Publications

JabRef references

You may access here the publications of all of the group members. For most of them you will be able to download the abstract, the bibtex reference, along with a courtesy copy of the manuscript for your personal use. The search form can use regular expressions.

Matching entries: 0
settings...
AuthorTitleYearJournal/ProceedingsReftypeLink
Perez-Serrano, A.; Javaloyes, J. & Balle, S. Wavelength multistability in ring and fabry-Perot lasers: The effect of spatial hole burning 2011 Lasers and Electro-Optics Europe (CLEO EUROPE/EQEC), 2011 Conference on and 12th European Quantum Electronics Conference, pp. 1  inproceedings DOI  
Abstract: In this contribution, we investigate theoretically the multistability by means of a travelling wave model (TWM) for a homogeneously broadened medium with the appropriate boundary conditions, that allow us to model RLs and FP lasers. We take into account that the presence of counter-propagating fields creates a spatial modulation or grating of the population inversion (D2). We compute the monochromatic steady state solutions of the system via a shooting method and we numerically perform their linear stability analysis by diagonalising the jacobian obtained from the evolution operator of the discretized system.
BibTeX:

@inproceedings{5942552,

  author = {Perez-Serrano, A. and Javaloyes, J. and Balle, S.},

  title = {Wavelength multistability in ring and fabry-Perot lasers: The effect of spatial hole burning},

  booktitle = {Lasers and Electro-Optics Europe (CLEO EUROPE/EQEC), 2011 Conference on and 12th European Quantum Electronics Conference},

  year = {2011},

  pages = {1},

  doi = {http://dx.doi.org/10.1109/CLEOE.2011.5942552}

}

Prrez-Serrano, A.; Javaloyes, J. & Balle, S. Bichromatic emission and coexisting multimode dynamics in Ring Lasers 2011 Lasers and Electro-Optics Europe (CLEO EUROPE/EQEC), 2011 Conference on and 12th European Quantum Electronics Conference, pp. 1  inproceedings DOI  
Abstract: In this contribution, a novel dynamical regimes where the emission in each direction is almost single-mode, but each direction lases at a different wavelength. This regime might have practical relevance in the development of gyroscopes, since the two directions are not phase-locked. This emission state may coexist with states of mode-locked unidirectional emission for large gain bandwidth and relatively small detuning . These mode-locked states arise via a Risken Nummedal instability without the need of intracavity saturable absorbers.
BibTeX:

@inproceedings{5942555,

  author = {Prrez-Serrano, A. and Javaloyes, J. and Balle, S.},

  title = {Bichromatic emission and coexisting multimode dynamics in Ring Lasers},

  booktitle = {Lasers and Electro-Optics Europe (CLEO EUROPE/EQEC), 2011 Conference on and 12th European Quantum Electronics Conference},

  year = {2011},

  pages = {1},

  doi = {http://dx.doi.org/10.1109/CLEOE.2011.5942555}

}

Marconi, M.; Giudici, M.; Barland, S.; Javaloyes, J. & Balle, S. Polarization dynamics of VCSELs with optical feedback and XPR 2011 Lasers and Electro-Optics Europe (CLEO EUROPE/EQEC), 2011 Conference on and 12th European Quantum Electronics Conference, pp. 1  inproceedings DOI  
Abstract: Vertical Cavity Surface-Emitting Laser (VCSEL) may exhibit bistability between two orthogonal polarization emissions (Balle et al., 1999). Hysteresis has been reported in a narrow range of pumping current (Giacomelli et al., 1998). In this contribution we consider a VCSEL with negligible dichroism, where bistability is extended to the whole range of biasing current, from threshold to absolute maximum biasing rate.
BibTeX:

@inproceedings{5942567,

  author = {Marconi, M. and Giudici, M. and Barland, S. and Javaloyes, J. and Balle, S.},

  title = {Polarization dynamics of VCSELs with optical feedback and XPR},

  booktitle = {Lasers and Electro-Optics Europe (CLEO EUROPE/EQEC), 2011 Conference on and 12th European Quantum Electronics Conference},

  year = {2011},

  pages = {1},

  doi = {http://dx.doi.org/10.1109/CLEOE.2011.5942567}

}

Javaloyes, J.; Stolarz, P.; Hou, L.; Sorel, M.; Bryce, A.C. & Balle, S. Passive mode-locking in quantum well Fabry-Perot lasers 2011 Lasers and Electro-Optics Europe (CLEO EUROPE/EQEC), 2011 Conference on and 12th European Quantum Electronics Conference, pp. 1  inproceedings DOI  
Abstract: We develop a detailed theoretical description of passively mode-locked semiconductor lasers based on saturable absorber and compare it with experimental results. Our approach is based on a coarse grained Traveling Wave Model approach and a recently developed analytical time-domain susceptibility of semiconductor quantum wells, Under the approximation of intraband quasi-equilibrium, our model accounts for the dispersion of gain, absorption and refractive index and self-phase modulation. This description is to our knowledge the first time domain model of semiconductor media that does not rely upon the integration of semiconductor Bloch equations.
BibTeX:

@inproceedings{5942605,

  author = {Javaloyes, J. and Stolarz, P. and Hou, L. and Sorel, M. and Bryce, A.C. and Balle, S.},

  title = {Passive mode-locking in quantum well Fabry-Perot lasers},

  booktitle = {Lasers and Electro-Optics Europe (CLEO EUROPE/EQEC), 2011 Conference on and 12th European Quantum Electronics Conference},

  year = {2011},

  pages = {1},

  doi = {http://dx.doi.org/10.1109/CLEOE.2011.5942605}

}

Romeira, B.; Seunarine, K.; Ironside, C.N.; Javaloyes, J.; Kelly, A.E. & Figueiredo, J.M.L. A Liénard optoelectronic oscillator with time-delayed feedback 2011 Lasers and Electro-Optics Europe (CLEO EUROPE/EQEC), 2011 Conference on and 12th European Quantum Electronics Conference, pp. 1  inproceedings DOI  
Abstract: Optoelectronic oscillators (OEO) combine electronic and photonic components to generate spectrally pure microwave signals in both optical and electrical domains. Since the first OEO was reported, several low-cost configurations have been proposed, Here we present a novel OEO configuration based on the integration of a resonant tunneling diode (RTD) photo-detector oscillator and a laser diode. We also show the OEO dynamics is well described as a Lienard oscillator. RTD-based devices work as voltage controlled oscillators taking advantage of RTD negative differential resistance (NDR) current-voltage (I-V) curve. The NDR extends over a wide bandwidth providing gain to the circuit allowing the implementation of compact high speed OEOs with improved performance and useful for optical communication and interconnection applications.
BibTeX:

@inproceedings{5942988,

  author = {Romeira, B. and Seunarine, K. and Ironside, C.N. and Javaloyes, J. and Kelly, A.E. and Figueiredo, J.M.L.},

  title = {A Liénard optoelectronic oscillator with time-delayed feedback},

  booktitle = {Lasers and Electro-Optics Europe (CLEO EUROPE/EQEC), 2011 Conference on and 12th European Quantum Electronics Conference},

  year = {2011},

  pages = {1},

  doi = {http://dx.doi.org/10.1109/CLEOE.2011.5942988}

}

Romeira, B.; Figueiredo, J.M.L.; Ironside, C.N.; Seunarine, K. & Javaloyes, J. Nonlinear dynamics of a Liénard delayed-feedback optoelectronic oscillator 2011 Nonlinear Dynamics and Synchronization (INDS) 16th Int'l Symposium on Theoretical Electrical Engineering (ISTET), 2011 Joint 3rd Int'l Workshop on, pp. 1 -5  inproceedings DOI  
Abstract: We present an optoelectronic oscillator (OEO) that is capable of generating complex and rich dynamics including stable periodic oscillations and broadband chaos. The OEO under analysis here is based on a resonant tunneling diode (RTD) oscillator driving a laser diode and a time-delayed feedback loop. The RTD based OEO is well described as a a Lienard oscillator with delayed-feedback. When subjected to external perturbation, the RTD-OEO generates periodic and chaotic states that are controlled by the delayed-feedback loop characteristics. The implemented numerical Lienard optoelectronic oscillator provides a simple way to study time-delayed dynamical systems containing negative resistance oscillators.
BibTeX:

@inproceedings{6024825,

  author = {Romeira, B. and Figueiredo, J.M.L. and Ironside, C.N. and Seunarine, K. and Javaloyes, J.},

  title = {Nonlinear dynamics of a Liénard delayed-feedback optoelectronic oscillator},

  booktitle = {Nonlinear Dynamics and Synchronization (INDS) 16th Int'l Symposium on Theoretical Electrical Engineering (ISTET), 2011 Joint 3rd Int'l Workshop on},

  year = {2011},

  pages = {1 -5},

  doi = {http://dx.doi.org/10.1109/INDS.2011.6024825}

}

Javaloyes, J.; Perez-Serrano, A. & Balle, S. Bifurcation analysis of traveling wave models 2011 Numerical Simulation of Optoelectronic Devices (NUSOD), 2011 11th International Conference on, pp. 145 -146  inproceedings DOI  
Abstract: We present a general method allowing to perform a direct bifurcation diagram and to determine the stability of the solutions of a Traveling wave model. We exemplify the cases of the two level atom and the semiconductor quantum well lasers.
BibTeX:

@inproceedings{6041184,

  author = {Javaloyes, J. and Perez-Serrano, A. and Balle, S.},

  title = {Bifurcation analysis of traveling wave models},

  booktitle = {Numerical Simulation of Optoelectronic Devices (NUSOD), 2011 11th International Conference on},

  year = {2011},

  pages = {145 -146},

  doi = {http://dx.doi.org/10.1109/NUSOD.2011.6041184}

}

Pérez-Serrano, A.; Javaloyes, J & Balle, S Longitudinal mode multistability in Ring and Fabry-Perot lasers: The effect of spatial hole burning 2011 Optics Express
Vol. 19(4), pp. 3284-3289 
article URL 
Abstract:

We theoretically discuss the impact of the cavity configuration
on the possible longitudinal mode multistability in homogeneously broadened lasers. Our analysis is based on the most general form of a Travelling-Wave Model for which we present a method that allows us to evaluate the monochromatic solutions as well as their eigenvalue spectrum. We find that multistability is more easily reached in Ring cavities as compared to Fabry-Pérot cavities, in agreement with recent experimental reports, which we explain by the different amounts of Spatial-Hole Burning in each configuration.

BibTeX:

@article{IMEDEA_intranet:10301,

  author = {Pérez-Serrano, A. and Javaloyes, J and Balle, S},

  title = {Longitudinal mode multistability in Ring and Fabry-Perot lasers: The effect of spatial hole burning},

  journal = {Optics Express},

  year = {2011},

  volume = {19},

  number = {4},

  pages = {3284--3289},

  url = {http://www.imedea.uib.es/pub_download.php?id=10301}

}

M., Palmer; Balle, S.; March, D.; Alós, J. & Linde, M. Estimating the size of circular home range from fish Mark-Release-(single)-Recapture data: the case of a small labrid targeted by recreational fishing 2011 Marine Ecology - Progress Series
Vol. 430, pp. 87-97 
article DOI URL 
Abstract:

 

Contrary to common belief, empirical evidence shows that a number of marine littoral fish species tend to remain in a small geographic area. Despite the growing awareness about the consequences of reduced mobility (ex., design of marine protected areas), an accurate description of fish movement is technically difficult; thus, it is usually not considered. Mark-Release-(single)-Recapture (MRsR) data obtained from externally tagged fish that are returned by fishermen or recreational fishers are potentially useful for describing fish movement. This study is a methodological contribution aimed at demonstrating a simple analytic strategy for estimating the size of the circular home range (i.e., the area where a fish spends most of the time) from MRsR data. This analytic strategy is not adequate for pelagic or large predators moving at the oceanic scale but could be suitable for some reef and littoral fish. The estimates obtained by this method are robust even if (i) the number of recaptured fish is small, (ii) fishing effort or habitat suitability displays some spatial variability and (iii) fish display some intra-specific variability. Based on only 32 recaptures, our data demonstrate that Coris julis (a small labrid targeted by recreational fishers) is more sedentary than previously assumed; this fish spends 95% of its time within an area 227 m in radius (Bayesian 95% credibility interval: 192 to 275 m). 

 

BibTeX:

@article{IMEDEA_intranet:10341,

  author = {Palmer M. and Balle, S. and March, D. and Alós, J. and Linde, M.},

  title = {Estimating the size of circular home range from fish Mark-Release-(single)-Recapture data: the case of a small labrid targeted by recreational fishing},

  journal = {Marine Ecology - Progress Series},

  year = {2011},

  volume = {430},

  pages = {87--97},

  url = {http://www.imedea.uib.es/pub_download.php?id=10341},

  doi = {http://dx.doi.org/10.3354/meps09109}

}

Javaloyes, J & Balle, S All-Optical Directional Switching of Bistable Semiconductor Ring Lasers 2011 IEEE Journal of Quantum Electronics
Vol. 47(8), pp. 1078-1085 
article DOI URL 
Abstract:

All-optical directional switching of bistable semiconductor
ring lasers is studied by numerical simulations of a
traveling-wave model. We discuss how the reversal depends on
the bias current applied to the laser as well as on the energy,
duration, and wavelength of the trigger pulses. For pulse durations
longer than the cavity roundtrip time, the reversal occurs
smoothly with a transient that exhibits relaxation oscillations,
otherwise, the transient is composed of large long-lived spikes
that reveal its multimode character. In the former case, the
switching speed can be defined like in electronics systems, but
not in the latter, which requires an operational definition of
the maximum speed based on, e.g., bit-error rate measurements.
Our model includes the light extraction sections present in real
devices, which allows us to discuss the experimental problems
posed by the differences existing between intracavity fields and
output fields.

BibTeX:

@article{IMEDEA_intranet:10460,

  author = {Javaloyes, J and Balle, S},

  title = {All-Optical Directional Switching of Bistable Semiconductor Ring Lasers},

  journal = {IEEE Journal of Quantum Electronics},

  year = {2011},

  volume = {47},

  number = {8},

  pages = {1078--1085},

  url = {http://www.imedea.uib.es/pub_download.php?id=10460},

  doi = {http://dx.doi.org/10.1109/JQE.2011.2152368}

}

Stolarz, P. M.; Javaloyes, J.; Mezösi, G.; Hou, L.; Ironside, C. N.; Sorel, M.; Bryce, A. C. & Balle, S. Spectral Dynamical Behavior in Passively Mode-Locked Semiconductor Lasers 2011 IEEE Photonics Journal
Vol. 3(6), pp. 1067-1082 
article URL 
Abstract:

In this paper, we present an experimental and theoretical study of passive modelocking in semiconductor Fabry–Pérot, quantum-well, lasers operating at around 1550 nm and producing picosecond pulses at a repetition frequency of 40 GHz. The different regimes that occur as the reverse bias voltage applied to the saturable absorber (SA) section or the
bias current injected into the amplifier section are characterized both in the time and frequency/wavelength domains. Our results reveal that the lasers display spectral competition between the gain of the amplifier section and the absorption of the SA, with variations of the lasing wavelength up to 25 nm as the bias conditions are changed. These wavelength variations result from the thermal drift of the SA band-edge due to Joule heating by the generated photocurrent and from the competition between two possible lasing regions placed either at the amplifier gain peak or near the band-edge of the SA. The experimental observations are satisfactorily reproduced and explained in the framework of a Traveling Wave Model complemented by a time-domain description of the semiconductor susceptibility.

BibTeX:

@article{IMEDEA_intranet:10498,

  author = {P. M. Stolarz and J. Javaloyes and G. Mezösi and L. Hou and C. N. Ironside and M. Sorel and A. C. Bryce and S. Balle},

  title = {Spectral Dynamical Behavior in Passively Mode-Locked Semiconductor Lasers},

  journal = {IEEE Photonics Journal},

  year = {2011},

  volume = {3},

  number = {6},

  pages = {1067--1082},

  url = {http://www.imedea.uib.es/pub_download.php?id=10498}

}

Serrano, Antonio Pérez Modeling semiconductor ring lasers 2011 School: Universitat Illes Balears  phdthesis URL 
BibTeX:

@phdthesis{IMEDEA_intranet:10499,

  author = {Antonio Pérez Serrano},

  title = {Modeling semiconductor ring lasers},

  school = {Universitat Illes Balears},

  year = {2011},

  url = {http://www.imedea.uib.es/pub_download.php?id=10499}

}

Javaloyes, J & Balle, S Anticolliding design for monolithic passively mode-locked semiconductor lasers 2011 Optics Letters
Vol. 36(22), pp. 4407-4409 
article DOI URL 
Abstract:

The performance of two-section, passively mode-locked semiconductor lasers is theoretically analyzed for different cavity designs. Placing the saturable absorber section close to an antireflection-coated facet leads to a substantial increase in output power and a reduction in amplitude and timing jitter. Moreover, it broadens the bias current region of stable passive mode-locking operation.

BibTeX:

@article{IMEDEA_intranet:10500,

  author = {Javaloyes, J and Balle, S},

  title = {Anticolliding design for monolithic passively mode-locked semiconductor lasers},

  journal = {Optics Letters},

  year = {2011},

  volume = {36},

  number = {22},

  pages = {4407--4409},

  url = {http://www.imedea.uib.es/pub_download.php?id=10500},

  doi = {http://dx.doi.org/10.1364/OL.36.004407}

}

Orfila, A; Balle, S & Simarro, G Constructive interferences as a seiche generation mechanism 2011 Scientia Marina
Vol. 75(3), pp. 595-603 
article DOI URL 
Abstract:

Constructive interferences as a seiche generation mechanism

BibTeX:

@article{IMEDEA_intranet:10578,

  author = {Orfila, A and Balle, S and Simarro, G},

  title = {Constructive interferences as a seiche generation mechanism},

  journal = {Scientia Marina},

  year = {2011},

  volume = {75},

  number = {3},

  pages = {595--603},

  url = {http://www.imedea.uib.es/pub_download.php?id=10578},

  doi = {http://dx.doi.org/10.3989/scimar.2011.75n3595}

}

Hou, Lianping; Stolarz, P.; Dylewicz, R.; Haji, M.; Javaloyes, J.; Qiu, B. & Bryce, A.C. 160-GHz Passively Mode-Locked AlGaInAs 1.55- mu m Strained Quantum-Well Compound Cavity Laser 2010 Photonics Technology Letters, IEEE
Vol. 22(10), pp. 727 -729 
article DOI  
Abstract: The first demonstration of harmonic mode-locked operation from a monolithic semiconductor laser comprising a compound cavity formed by twin deeply etched intracavity reflectors based on 1.55- mu m AlGaInAs strained quantum-well material is presented. Nearly transform-limited Gaussian pulses are generated at 160-GHz repetition rate with a 1.67-ps pulse duration.
BibTeX:

@article{5432958,

  author = {Lianping Hou and Stolarz, P. and Dylewicz, R. and Haji, M. and Javaloyes, J. and Qiu, B. and Bryce, A.C.},

  title = {160-GHz Passively Mode-Locked AlGaInAs 1.55- mu m Strained Quantum-Well Compound Cavity Laser},

  journal = {Photonics Technology Letters, IEEE},

  year = {2010},

  volume = {22},

  number = {10},

  pages = {727 -729},

  doi = {http://dx.doi.org/10.1109/LPT.2010.2045228}

}

Javaloyes, J. & Balle, S. Mode-Locking in Semiconductor Fabry-Perot Lasers 2010 Quantum Electronics, IEEE Journal of
Vol. 46(7), pp. 1023 -1030 
article DOI  
Abstract: We theoretically study the dynamics and the mode-locking properties of semiconductor Fabry-Perot lasers with intracavity saturable absorber by using a travelling-wave model and a time-domain description of the optical response of the semiconductor materials. Our description enables us to incorporate important features as for instance the abrupt spectral variations of the absorption in the saturable absorber. We analyze the influence of several key parameters that affect the stability of the mode-locking regime and show that this modelling approach can be used, upon proper fitting of the material parameters, for optimization of the design of semiconductor mode-locked lasers.
BibTeX:

@article{5440029,

  author = {Javaloyes, J. and Balle, S.},

  title = {Mode-Locking in Semiconductor Fabry-Perot Lasers},

  journal = {Quantum Electronics, IEEE Journal of},

  year = {2010},

  volume = {46},

  number = {7},

  pages = {1023 -1030},

  doi = {http://dx.doi.org/10.1109/JQE.2010.2042792}

}

Javaloyes, J.; Stolarz, P.; Hou, L.; Sorel, M.; Bryce, A.C. & Balle, S. Passive Mode-Locking in AlGaInAs 1.55-mu m strained quantum well lasers: Modeling and experiment 2010 Optical Communication (ECOC), 2010 36th European Conference and Exhibition on, pp. 1 -3  inproceedings DOI  
Abstract: We study the Mode-Locking dynamics of 40-GHz semiconductor Fabry-Perot lasers with intracavity saturable absorber by using a Traveling-Wave-Model and a time-domain response of the semiconductor material. We analyze the influence of key parameters and compare our predictions with experimental results.
BibTeX:

@inproceedings{5621528,

  author = {Javaloyes, J. and Stolarz, P. and Hou, L. and Sorel, M. and Bryce, A.C. and Balle, S.},

  title = {Passive Mode-Locking in AlGaInAs 1.55-mu m strained quantum well lasers: Modeling and experiment},

  booktitle = {Optical Communication (ECOC), 2010 36th European Conference and Exhibition on},

  year = {2010},

  pages = {1 -3},

  doi = {http://dx.doi.org/10.1109/ECOC.2010.5621528}

}

Haji, M.; Hou, L.; Kelly, A.E.; Green, R.; Mezosi, G.; Javaloyes, J.; Bryce, A.C. & Arnold, J.M. Sub-picosecond pulse generation using fast saturable absorption in AlGaInAs/InP quantum wells 2010 IEEE Photonics Society, 2010 23rd Annual Meeting of the, pp. 299 -300  inproceedings DOI  
Abstract: Fast saturable absorber recovery times have been obtained in AlGaInAs/InP multiple quantum wells using the cross absorption modulation method for wavelength conversion. We report sub-picosecond pulse generation using a 40 GHz passively mode locked laser.
BibTeX:

@inproceedings{5698878,

  author = {Haji, M. and Hou, L. and Kelly, A.E. and Green, R. and Mezosi, G. and Javaloyes, J. and Bryce, A.C. and Arnold, J.M.},

  title = {Sub-picosecond pulse generation using fast saturable absorption in AlGaInAs/InP quantum wells},

  booktitle = {IEEE Photonics Society, 2010 23rd Annual Meeting of the},

  year = {2010},

  pages = {299 -300},

  doi = {http://dx.doi.org/10.1109/PHOTONICS.2010.5698878}

}

Javaloyes, J. & Balle, S. Quasiequilibrium time-domain susceptibility of semiconductor quantum wells 2010 Physical Review A - Atomic, Molecular, and Optical Physics
Vol. 81, pp. 062505 
article DOI URL 
Abstract:

We analyze the time-domain optical response of quantum well (QW) media in the quasiequilibrium
approximation. The resulting macroscopic polarization can be expressed as a convolution integral that
permits a simple and efficient numerical implementation for its use in dynamical modeling. As a practical
example, the resulting polarization is used in conjunction with a travelling-wave model (TWM) for analyzing
saturable absorption as a pulse propagates in a waveguide that incorporates an unpumped QW in its core.
Frequency-selective saturable absorption and pulse distortion are observed.

BibTeX:

@article{IMEDEA_intranet:10019,

  author = {J. Javaloyes and S. Balle},

  title = {Quasiequilibrium time-domain susceptibility of semiconductor quantum wells},

  journal = {Physical Review A - Atomic, Molecular, and Optical Physics},

  year = {2010},

  volume = {81},

  pages = {062505},

  url = {http://www.imedea.uib.es/pub_download.php?id=10019},

  doi = {http://dx.doi.org/10.1103/PhysRevA.81.062505}

}

Consoli, A.; Esquivias, I.; Hernández, F. J. López; Mulet, J. & Balle, S. Characterization of Gain-Switched Pulses From 1.55-um VCSEL 2010 IEEE Photonics Technology Letters
Vol. 22, pp. 772-774 
article URL 
Abstract:

We report on short optical pulse generation by
gain-switching (GS) a low-cost commercial vertical-cavity surface-emitting laser emitting at 1.55 m. The dependence of pulse characteristics on GS parameters is investigated and analyzed. Pulses with duration of 55 ps and time-bandwidth product between 0.91 and 2.2 are obtained at repetition rates between 1 and 3 GHz.

BibTeX:

@article{IMEDEA_intranet:10381,

  author = {A. Consoli and I. Esquivias and F. J. López Hernández and J. Mulet and S. Balle},

  title = {Characterization of Gain-Switched Pulses From 1.55-um VCSEL},

  journal = {IEEE Photonics Technology Letters},

  year = {2010},

  volume = {22},

  pages = {772--774},

  url = {http://www.imedea.uib.es/pub_download.php?id=10381}

}

Alós, J.; Palmer, M.; Balle, S.; Grau, A. & Morales-Nin, B. Individual growth pattern and variability in Serranus scriba (Linnaeus, 1758): a Bayesian analysis. 2010 ICES Journal of Marine Science
Vol. 67, pp. 502-512 
article URL 
Abstract:

Variability in growth patterns at an individual level in Serranus scriba is described using a Bayesian approach for a generalized von
Bertalanffy growth model that accommodates one change in growth rate at a specific point during the lifespan. The approach
enables individual growth curves to be inferred, even in a species with a relatively short lifespan and no commercial value, i.e.
limited sample sizes available, but potentially endangered by recreational fishing. The change in growth rate may be the result of differ-
ing allocation of energy between reproductive and somatic activities at different ages. Overall, the approach presented provides ade-
quate input for future implementation of population dynamics models that take into account individual variability, e.g. individual-
based models, even for species for which limited data are available.

BibTeX:

@article{IMEDEA_intranet:2516,

  author = {Alós, J. and Palmer, M. and Balle, S. and Grau, A. and Morales-Nin, B.},

  title = {Individual growth pattern and variability in Serranus scriba (Linnaeus, 1758): a Bayesian analysis.},

  journal = {ICES Journal of Marine Science},

  year = {2010},

  volume = {67},

  pages = {502--512},

  url = {http://www.imedea.uib.es/pub_download.php?id=2516}

}

Ca nellas, B.; Balle, S.; Orfila, A. & Tintoré, J Wave height prediction in the Western Mediterranean using Genetic Algorithms 2010 Ocean Engineering
Vol. 37, pp. 742-748 
article DOI URL 
Abstract:

This study explores the suitability of a soft computing technique to predict (forecast and hindcast) significant wave heights in some areas of the Mediterranean Sea. Using a 44-year database of meteorological and oceanographic records we train a genetic algorithm, to reconstruct a 44-year time series of significant wave height at different coastal points of the Balearic Islands (Western Mediterranean). The correlation obtained between the numerical model data and the algorithm output is 0.80≤r2≤0.97. The equations obtained by the genetic algorithm are then used to predict significant wave heights measured at several buoys. We make use of the equation from the node closest to the buoy using as input wind data from the meteorological station at each buoy. We obtained that SWH at each buoy can be predicted with a 1-h ahead forecast time using only wind data from the previous 12 h with a correlation of 0.87≤r2≤0.91.

BibTeX:

@article{IMEDEA_intranet:2558,

  author = {Cañellas, B. and Balle, S. and Orfila, A. and Tintoré, J},

  title = {Wave height prediction in the Western Mediterranean using Genetic Algorithms},

  journal = {Ocean Engineering},

  year = {2010},

  volume = {37},

  pages = {742--748},

  url = {http://www.imedea.uib.es/pub_download.php?id=2558},

  doi = {http://dx.doi.org/10.1016/j.oceaneng.2010.02.006}

}

Nieto, M. A.; Garau, B.; Balle, S.; Simarro, G.; A., Zarruk G.; Ortiz, A.; Tintoré, J.; Álvarez-Ellacuría, A.; Gómez-Pujol, L. & Orfila, A An Open Source, Low Cost Video-Based Coastal Monitoring System 2010 Earth Surface Processes and Landforms
Vol. 35, pp. 1712-1719 
article DOI URL 
Abstract:

A low cost, automated, remote monitoring video system built on standard commercial off-the-shelf (COTS) components
and implemented with open source software is presented. The system has been implemented in a coastal area to perform
image acquisition and processing, generating statistical products and transferring the information from the fi eld to a central node
where post-processing and data visualization are made available to the general public. The open structure of the software allows
the user to implement new routines and modules appropriate to fi t specifi c needs as well as to adapt the system to study other
dynamical processes where continuous observation is required. The software and image data base can be obtained as freeware.
Copyright © 2010 John Wiley & Sons, Ltd.

BibTeX:

@article{IMEDEA_intranet:2559,

  author = {Nieto, M. A. and Garau, B. and Balle, S. and Simarro, G. and Zarruk G. A. and Ortiz, A. and Tintoré, J. and Álvarez-Ellacuría, A. and Gómez-Pujol, L. and Orfila, A},

  title = {An Open Source, Low Cost Video-Based Coastal Monitoring System},

  journal = {Earth Surface Processes and Landforms},

  year = {2010},

  volume = {35},

  pages = {1712--1719},

  url = {http://www.imedea.uib.es/pub_download.php?id=2559},

  doi = {http://dx.doi.org/10.1002/esp.2025}

}

Strain, M. J.; Mezösi, G.; Javaloyes, J.; Sorel, M.; Pérez-Serrano, A.; Sicrè, A. & Balle, S. Semiconductor Snail Lasers 2010 Applied Physics Letters
Vol. 96, pp. 121105 
article URL 
Abstract:

A modified ring laser geometry is presented to promote stable unidirectional lasing. The effects of
directional coupling and facet reflectivities are investigated with respect to quantum efficiency,
directionality, and side-mode suppression ratio of the lasing spectra. Simulation and experimental
results are presented showing single mode > 20 dB side-mode suppression ratio, unidirectional
lasing on an InP based multiple quantum well material.

BibTeX:

@article{IMEDEA_intranet:2560,

  author = {Strain, M. J. and Mezösi, G. and Javaloyes, J. and Sorel, M. and Pérez-Serrano, A. and Sicrè, A. and Balle, S.},

  title = {Semiconductor Snail Lasers},

  journal = {Applied Physics Letters},

  year = {2010},

  volume = {96},

  pages = {121105},

  url = {http://www.imedea.uib.es/pub_download.php?id=2560}

}

Pérez-Serrano, A.; Javaloyes, J. & Balle, S. Bi-chromatic emission and multi-mode dynamics in bidirectional Ring Lasers 2010 Physical Review A - Atomic, Molecular, and Optical Physics
Vol. 81, pp. 043817 
article URL 
Abstract:

The multimode dynamics of a two-level ring laser is explored numerically using a bidirectional traveling wave
model retaining the spatial effects due to the presence of counter-propagating electric fields in the population
inversion. Dynamical regimes where the emission in each direction occurs at different wavelengths are studied.
Mode-locked unidirectional emission for large gain bandwidth and relatively small detuning is reported.

BibTeX:

@article{IMEDEA_intranet:2561,

  author = {Pérez-Serrano, A. and Javaloyes, J. and Balle, S.},

  title = {Bi-chromatic emission and multi-mode dynamics in bidirectional Ring Lasers},

  journal = {Physical Review A - Atomic, Molecular, and Optical Physics},

  year = {2010},

  volume = {81},

  pages = {043817},

  url = {http://www.imedea.uib.es/pub_download.php?id=2561}

}

Pérez-Serrano, Antonio; Javaloyes, Julien & Balle, Salvador Erratum: Bichromatic emission and multimode dynamics in bidirectional ring lasers [Phys. Rev. A 81, 043817 (2010)] 2010 Phys. Rev. A
Vol. 82, pp. 019904 
article DOI URL 
BibTeX:

@article{PhysRevA.82.019904,

  author = {Pérez-Serrano, Antonio and Javaloyes, Julien and Balle, Salvador},

  title = {Erratum: Bichromatic emission and multimode dynamics in bidirectional ring lasers [Phys. Rev. A 81, 043817 (2010)]},

  journal = {Phys. Rev. A},

  publisher = {American Physical Society},

  year = {2010},

  volume = {82},

  pages = {019904},

  url = {http://link.aps.org/doi/10.1103/PhysRevA.82.019904},

  doi = {http://dx.doi.org/10.1103/PhysRevA.82.019904}

}

Javaloyes, J.; Trita, A.; Mezosi, G.; Bragheri, F.; Cristiani, I.; Giuliani, G.; Sorel, M.; Scire, A. & Balle, S. Ultrafast all-optical switching of bistable Semiconductor Ring Lasers 2009 Lasers and Electro-Optics 2009 and the European Quantum Electronics Conference. CLEO Europe - EQEC 2009. European Conference on, pp. 1  inproceedings DOI  
Abstract: Semiconductor ring lasers (SRLs) usually exhibit regimes of unidirectional operation, which offers a great potential for applications such as all-optical memories, switching and gating. In this paper, bistable semiconductor ring lasers of cavity lengths ranging from 1200 �¿m up to 1900 �¿m is fabricated. The devices were fabricated on a multiple quantum well AlGalnAs/InP wafer using a shallow etched technology. To study all-optical flip-flop operation of the device, 5 ps FWHM optical trigger pulses produced by an OPO is injected. In order to evaluate the limits of switching speed that can be achieved, numerical simulations of the SRL using a recently developed traveling-wave model is performed. The model includes coupling of the CW and CCW waves arising from both spectral- and spatial-hole burning in the carrier density. The numerical results are in excellent agreement with the experimental observations.
BibTeX:

@inproceedings{5191742,

  author = {Javaloyes, J. and Trita, A. and Mezosi, G. and Bragheri, F. and Cristiani, I. and Giuliani, G. and Sorel, M. and Scire, A. and Balle, S.},

  title = {Ultrafast all-optical switching of bistable Semiconductor Ring Lasers},

  booktitle = {Lasers and Electro-Optics 2009 and the European Quantum Electronics Conference. CLEO Europe - EQEC 2009. European Conference on},

  year = {2009},

  pages = {1},

  doi = {http://dx.doi.org/10.1109/CLEOE-EQEC.2009.5191742}

}

Perez-Serrano, A.; Furst, S.; Scire, A.; Javaloyes, J.; Sorel, M. & Balle, S. Modal structure of integrated Semiconductor Ring Lasers with output waveguides 2009 Lasers and Electro-Optics 2009 and the European Quantum Electronics Conference. CLEO Europe - EQEC 2009. European Conference on, pp. 1  inproceedings DOI  
Abstract: In recent years semiconductor ring lasers (SRLs) have attracted interest for their diverse potential application, e.g. their fast directional bistability recently opened up a new scenario for the development of all- optical memories and signal processing. Besides, SRLs show unexpected dynamical behaviors, such as hysteresis in the lasing direction, and peculiar lasing mode selection rules. In this contribution, we present an experimental and theoretical investigation concerning the modal structure and selection rules of a SRL with output waveguides.
BibTeX:

@inproceedings{5191792,

  author = {Perez-Serrano, A. and Furst, S. and Scire, A. and Javaloyes, J. and Sorel, M. and Balle, S.},

  title = {Modal structure of integrated Semiconductor Ring Lasers with output waveguides},

  booktitle = {Lasers and Electro-Optics 2009 and the European Quantum Electronics Conference. CLEO Europe - EQEC 2009. European Conference on},

  year = {2009},

  pages = {1},

  doi = {http://dx.doi.org/10.1109/CLEOE-EQEC.2009.5191792}

}

Javaloyes, J.; Mezosi, G.; Sorel, M. & Balle, S. Emission directionality of Semiconductor Ring Lasers 2009 Lasers and Electro-Optics 2009 and the European Quantum Electronics Conference. CLEO Europe - EQEC 2009. European Conference on, pp. 1  inproceedings DOI  
Abstract: Semiconductor ring lasers (SRL) are interesting devices from the technological point of view because they do not require cleaved facets or gratings in order to achieve the necessary optical feedback for lasing. In SRL, light extraction is accomplished via evanescent coupling from the waveguide into several output waveguides.
BibTeX:

@inproceedings{5194825,

  author = {Javaloyes, J. and Mezosi, G. and Sorel, M. and Balle, S.},

  title = {Emission directionality of Semiconductor Ring Lasers},

  booktitle = {Lasers and Electro-Optics 2009 and the European Quantum Electronics Conference. CLEO Europe - EQEC 2009. European Conference on},

  year = {2009},

  pages = {1},

  doi = {http://dx.doi.org/10.1109/CLEOE-EQEC.2009.5194825}

}

Javaloyes, J.; Hou, L.; Stolarz, P.; Green, R.P.; Ironside, C.N.; Sorel, M.; Arnold, J.M.; Bryce, A.C. & Balle, S. Wide range 40-GHz Passive Mode-Locking operation of an AlGaInAs 1.55-mu m Strained Quantum Well laser 2009 Lasers and Electro-Optics 2009 and the European Quantum Electronics Conference. CLEO Europe - EQEC 2009. European Conference on, pp. 1  inproceedings DOI  
Abstract: We develop a comprehensive theoretical description of passive mode-locked semiconductor lasers based on a coarse grained time-domain approach. Under the approximation of intraband quasi equilibrium, our model accounts for the dispersion of gain, absorption and refractive index, nonlinear gain saturation from ultrafast processes, self-phase modulation, and spontaneous emission noise. We compare the predictions of our model with the perforamances of a quasi-40-GHz passively mode-locked AlGalnAs 1.55-m Strained Quantum Well laser.
BibTeX:

@inproceedings{5196429,

  author = {Javaloyes, J. and Hou, L. and Stolarz, P. and Green, R.P. and Ironside, C.N. and Sorel, M. and Arnold, J.M. and Bryce, A.C. and Balle, S.},

  title = {Wide range 40-GHz Passive Mode-Locking operation of an AlGaInAs 1.55-mu m Strained Quantum Well laser},

  booktitle = {Lasers and Electro-Optics 2009 and the European Quantum Electronics Conference. CLEO Europe - EQEC 2009. European Conference on},

  year = {2009},

  pages = {1},

  doi = {http://dx.doi.org/10.1109/CLEOE-EQEC.2009.5196429}

}

Hou, Lianping; Stolarz, P.; Javaloyes, J.; Green, R.P.; Ironside, C.N.; Sorel, M. & Bryce, A.C. Subpicosecond Pulse Generation at Quasi-40-GHz Using a Passively Mode-Locked AlGaInAs-InP 1.55- hbox m Strained Quantum-Well Laser 2009 Photonics Technology Letters, IEEE
Vol. 21(23), pp. 1731 -1733 
article DOI  
Abstract: We report on subpicosecond pulse generation using passively mode-locked laser diodes based on AlGaInAs 1.55-mum strained multiquantum-wells. Without any external pulse compression, the nearly transform-limited Gaussian pulses are generated at the quasi-40-GHz repetition rate with the 700-fs pulse duration.
BibTeX:

@article{5233855,

  author = {Lianping Hou and Stolarz, P. and Javaloyes, J. and Green, R.P. and Ironside, C.N. and Sorel, M. and Bryce, A.C.},

  title = {Subpicosecond Pulse Generation at Quasi-40-GHz Using a Passively Mode-Locked AlGaInAs-InP 1.55- hbox m Strained Quantum-Well Laser},

  journal = {Photonics Technology Letters, IEEE},

  year = {2009},

  volume = {21},

  number = {23},

  pages = {1731 -1733},

  doi = {http://dx.doi.org/10.1109/LPT.2009.2031088}

}

Trita, A.; Latorre Vidal, M.J.; Zanola, M.; Mezosi, G.; Javaloyes, J.; Sorel, M.; Bragheri, F.; Cristiani, I.; Scire, A.; Balle, S. & Giuliani, G. All-optical Set-Reset Flip-Flop based on semiconductor ring laser: Ultrafast response and error-free Bit-Error-Rate operation 2009 Photonics in Switching, 2009. PS '09. International Conference on, pp. 1 -2  inproceedings DOI  
Abstract: A monolithic semiconductor ring laser (SRL) operates as all-optical Flip-Flop. We report on ps-scale temporal response and Bit-Error-Rate experiments.
BibTeX:

@inproceedings{5307798,

  author = {Trita, A. and Latorre Vidal, M.J. and Zanola, M. and Mezosi, G. and Javaloyes, J. and Sorel, M. and Bragheri, F. and Cristiani, I. and Scire, A. and Balle, S. and Giuliani, G.},

  title = {All-optical Set-Reset Flip-Flop based on semiconductor ring laser: Ultrafast response and error-free Bit-Error-Rate operation},

  booktitle = {Photonics in Switching, 2009. PS '09. International Conference on},

  year = {2009},

  pages = {1 -2},

  doi = {http://dx.doi.org/10.1109/PS.2009.5307798}

}

Bryce, A.C.; Stolarz, P.; Javaloyes, J.; Hou, L.; Sorel, M. & Balle, S. Passive mode-locking of AlGaInAs quantum well laser, modelling and experiment 2009 LEOS Annual Meeting Conference Proceedings, 2009. LEOS '09. IEEE, pp. 515 -516  inproceedings DOI  
Abstract: We have developed a comprehensive theoretical description of passive mode-locked semiconductor lasers based on a coarse-grained time-domain approach. The results are compared with the performance of a passively mode-locked AlGaInAs strained quantum well lasers.
BibTeX:

@inproceedings{5343169,

  author = {Bryce, A.C. and Stolarz, P. and Javaloyes, J. and Hou, L. and Sorel, M. and Balle, S.},

  title = {Passive mode-locking of AlGaInAs quantum well laser, modelling and experiment},

  booktitle = {LEOS Annual Meeting Conference Proceedings, 2009. LEOS '09. IEEE},

  year = {2009},

  pages = {515 -516},

  doi = {http://dx.doi.org/10.1109/LEOS.2009.5343169}

}

Javaloyes, Julien & Balle, Salvador Emission Directionality of Semiconductor Ring Lasers: A Traveling-Wave Description 2009 IEEE Journal of Quantum Electronics
Vol. 45, pp. 431-438 
article URL 
Abstract:

We use a traveling-wave model for explaining the experimentally observed changes in the directionality of the emission of semiconductor ring lasers and its different behavior when current is increased or decreased. The modulation of the cavity losses imposed by the light extraction sections together with the thermal shift of the gain spectrum and spatial hole burning in the carrier density play a crucial role in the directionality of the emission and its changes with operation current. The differences as the current is increased or decreased correspond to the different role played by spatial hole burning.

BibTeX:

@article{IMEDEA_intranet:2328,

  author = {Javaloyes,Julien and Balle,Salvador},

  title = {Emission Directionality of Semiconductor Ring Lasers: A Traveling-Wave Description},

  journal = {IEEE Journal of Quantum Electronics},

  year = {2009},

  volume = {45},

  pages = {431--438},

  url = {http://www.imedea.uib.es/pub_download.php?id=2328}

}

Perez-Serrano, A.; Furst, S.; Scire, A.; Javaloyes, J.; Balle, S. & Sorel, M. Modal structure of integrated semiconductor ring lasers with output waveguides 2008 Semiconductor Laser Conference, 2008. ISLC 2008. IEEE 21st International, pp. 129 -130  inproceedings DOI  
Abstract: We have experimentally and theoretically analyzed the modal properties of semiconductor ring lasers and the wavelength jumps that occur in connection with directional switching above threshold.
BibTeX:

@inproceedings{4636043,

  author = {Perez-Serrano, A. and Furst, S. and Scire, A. and Javaloyes, J. and Balle, S. and Sorel, M.},

  title = {Modal structure of integrated semiconductor ring lasers with output waveguides},

  booktitle = {Semiconductor Laser Conference, 2008. ISLC 2008. IEEE 21st International},

  year = {2008},

  pages = {129 -130},

  doi = {http://dx.doi.org/10.1109/ISLC.2008.4636043}

}

Sanchez-Naves, J.; Furfaro, L.; Piro, O. & Balle, S. Impact and permanence of LASIK-induced structural changes in the cornea on pneumotonometric measurements: contributions of flap cutting and stromal ablation 2008 Journal of Glaucoma
Vol. 19, pp. 611-618 
article URL 
Abstract:

PURPOSE: to determine the factors that lead to changes in intraocular pressure (IOP) measurements after LASIK and their long-term stability. PATIENTS AND METHODS: 522 myopic eyes and 296 hyperopic eyes were enrolled in the study. Pneumotonometry was used to measure IOP once in the preoperative stage, and twice in the postoperative stage: one month after the operation, and one year later. Ultrasonic pachymetry was used to determine pre- and intraoperative corneal thicknesses and axial length of the eye, while optical pachymetry was utilized in the pre-operative stage and one month after surgery. Corneal topography was used to determine the pre- and postoperative mean curvature of the anterior surface of the cornea over 3 and 5 mm diameter regions. Comparative statistical analysis of the retrospective data series was performed. RESULTS: a highly significant reduction of IOP readings is found after LASIK for both myopic and hyperopic eyes. The reduction is stable one year after LASIK. In the case of myopic eyes, the reduction has a highly significant linear correlation with the amount of tissue ablated in the central region of the cornea. CONCLUSIONS: pneumotonometric IOP readings after LASIK are reduced, without recovering preoperative values even one year after surgery, due to flap cutting and tissue removal in the central region of the cornea. The contribution of flap cutting is estimated to be (1.6 +/- 0.8) mm Hg, while ablation contributes an additional (0.029 +/- 0.003) mm Hg per um of removed tissue. This effect should be considered when evaluating the accuracy of IOP measurements in LASIK patients who are at risk for developing glaucoma.

BibTeX:

@article{IMEDEA_intranet:2300,

  author = {J. Sanchez-Naves and L. Furfaro and O. Piro and S. Balle},

  title = {Impact and permanence of LASIK-induced structural changes in the cornea on pneumotonometric measurements: contributions of flap cutting and stromal ablation},

  journal = {Journal of Glaucoma},

  year = {2008},

  volume = {19},

  pages = {611--618},

  url = {http://www.imedea.uib.es/pub_download.php?id=2300}

}

Fürst, S.; Perez-Serrano, A.; Scirè, A.; Sorel, M. & Balle, S. Modal Structure, Directional and Wavelength Jumps of Integrated Semiconductor Ring Lasers:: Experiment and Theory 2008 Applied Physics Letters
Vol. 93, pp. 251109 
article URL 
Abstract:

We have experimentally and theoretically analyzed the modal properties of semiconductor ring
lasers and the wavelength jumps that occur in connection with directional switching above the
threshold.

BibTeX:

@article{IMEDEA_intranet:2301,

  author = {S. Fürst and A. Perez-Serrano and A. Scirè and M. Sorel and S. Balle},

  title = {Modal Structure, Directional and Wavelength Jumps of Integrated Semiconductor Ring Lasers:: Experiment and Theory},

  journal = {Applied Physics Letters},

  year = {2008},

  volume = {93},

  pages = {251109},

  url = {http://www.imedea.uib.es/pub_download.php?id=2301}

}

Mulet, J.; Balle, S.; Arias, J.; Martín-Hériz, V. & Esquivias, I. Current self-distribution effects in oxide confined vertical-cavity surface-emitting lasers 2008 Optical and Quantum Electronics
Vol. 40, pp. 1199-1204 
article URL 
Abstract:

We develop a self-consistent electro-optical model for oxide-confined Vertical-
Cavity Surface-Emitting Lasers, including optical polarization and spin-flip dynamics. When
subject to large signal modulation, current self-distribution effects reduce the amount of
spatial-hole burning in the device, leading to a reduced overshoot during transients and an
increased damping of the relaxation oscillations.

BibTeX:

@article{IMEDEA_intranet:2564,

  author = {Mulet, J. and Balle, S. and Arias, J. and Martín-Hériz, V. and Esquivias, I.},

  title = {Current self-distribution effects in oxide confined vertical-cavity surface-emitting lasers},

  journal = {Optical and Quantum Electronics},

  year = {2008},

  volume = {40},

  pages = {1199--1204},

  url = {http://www.imedea.uib.es/pub_download.php?id=2564}

}

Javaloyes, J.; Perrin, M. & Politi, A Collective atomic recoil laser as a synchronization transition 2008 Phys. Rev. E
Vol. 78, pp. 011108 
article DOI URL 
BibTeX:

@article{PhysRevE.78.011108,

  author = {Javaloyes, J. and Perrin, M. and Politi, A},

  title = {Collective atomic recoil laser as a synchronization transition},

  journal = {Phys. Rev. E},

  publisher = {American Physical Society},

  year = {2008},

  volume = {78},

  pages = {011108},

  url = {http://link.aps.org/doi/10.1103/PhysRevE.78.011108},

  doi = {http://dx.doi.org/10.1103/PhysRevE.78.011108}

}

S., Antonio Pérez; Fürst, Sandor; Scirè, Alessandro; Javaloyes, Julien; Balle, Salvador & Sorel, Marc Modelling strategies for semiconductor ring lasers 2008 Semiconductor Lasers and Laser Dynamics III
Vol. 6997(1), pp. 69971N 
conference DOI URL 
BibTeX:

@conference{s.:69971N,

  author = {Antonio Pérez S. and Sandor Fürst and Alessandro Scirè and Julien Javaloyes and Salvador Balle and Marc Sorel},

  title = {Modelling strategies for semiconductor ring lasers},

  journal = {Semiconductor Lasers and Laser Dynamics III},

  publisher = {SPIE},

  year = {2008},

  volume = {6997},

  number = {1},

  pages = {69971N},

  url = {http://link.aip.org/link/?PSI/6997/69971N/1},

  doi = {http://dx.doi.org/10.1117/12.780847}

}

Javaloyes, J. & Balle, S. Influence of Thermal Effects on Cross-Gain Modulation Characteristics in VCSOA 2007 Quantum Electronics, IEEE Journal of
Vol. 43(1), pp. 65 -71 
article DOI  
Abstract: We study theoretically and numerically the influence of thermal effects on the cross-gain modulation (XGM) characteristics of vertical-cavity semiconductor-optical amplifiers. We show that heating of the device may lead to noticeable modifications of the XGM efficiency spectrum, leading even to negative XGM efficiency, in good agreement with recent experimental results
BibTeX:

@article{4049857,

  author = {Javaloyes, J. and Balle, S.},

  title = {Influence of Thermal Effects on Cross-Gain Modulation Characteristics in VCSOA},

  journal = {Quantum Electronics, IEEE Journal of},

  year = {2007},

  volume = {43},

  number = {1},

  pages = {65 -71},

  doi = {http://dx.doi.org/10.1109/JQE.2006.885207}

}

Javaloyes, J.; Mulet, J.; Giudici, M. & Balle, S. Passive mode-locking of lasers by crossed-polarization gain modulation 2007 Lasers and Electro-Optics, 2007 and the International Quantum Electronics Conference. CLEOE-IQEC 2007. European Conference on, pp. 1  inproceedings DOI  
Abstract: Passive mode-locking (PML) of VCSEL by crossed-polarisation gain modulation is studied. PML at repetition rates in the GHz range and pulsewidths of few tens of picoseconds were found using a two-mode rate equation mode where feedback and reinjection are included as delayed terms. Preliminary experimental results relating a recent realization of this scheme to the case of small area proton implanted VCSEL at 850 nm is also presented.
BibTeX:

@inproceedings{4386024,

  author = {Javaloyes, J. and Mulet, J. and Giudici, M. and Balle, S.},

  title = {Passive mode-locking of lasers by crossed-polarization gain modulation},

  booktitle = {Lasers and Electro-Optics, 2007 and the International Quantum Electronics Conference. CLEOE-IQEC 2007. European Conference on},

  year = {2007},

  pages = {1},

  doi = {http://dx.doi.org/10.1109/CLEOE-IQEC.2007.4386024}

}

Giudici, M.; Mulet, J.; Javaloyes, J. & Balle, S. Square-wave switching by crossed-polarization reinjection in VCSELs 2007 Lasers and Electro-Optics, 2007 and the International Quantum Electronics Conference. CLEOE-IQEC 2007. European Conference on, pp. 1  inproceedings DOI  
Abstract: We take a VCSEL that emits stably in a linearly polarized state (X) and we make it experience crossed-polarization reinjection (XPR) of the lasing into the non-lasing linear polarization. The lasing threshold is not modified by the level of XPR. For currents close to the laser threshold the output is quite irregular, but square-wave switching develops when the current is increased however, a degradation of the square-wave switching is observed when current is further increased. Degradation of the square-wave switching is linked to the finite value of the spin-flip rate and the residual dichroism, and it occurs when the current approaches the boundaries of polarization bistability for the solitary VCSEL.
BibTeX:

@inproceedings{4386994,

  author = {Giudici, M. and Mulet, J. and Javaloyes, J. and Balle, S.},

  title = {Square-wave switching by crossed-polarization reinjection in VCSELs},

  booktitle = {Lasers and Electro-Optics, 2007 and the International Quantum Electronics Conference. CLEOE-IQEC 2007. European Conference on},

  year = {2007},

  pages = {1},

  doi = {http://dx.doi.org/10.1109/CLEOE-IQEC.2007.4386994}

}

Mulet, Josep; Javaloyes, Julien & Balle, Salvador Mode-Locking of VECSELs by Crossed-Polarization Gain Modulation 2007 IEEE Journal of Quantum Electronics
Vol. 43(9), pp. 786-793 
article URL 
Abstract:

We analyze in detail an approach for inducing passive
mode-locking (ML) in vertical-external-cavity surface-emitting lasers (VECSELs) without using any saturable absorber but directly exploiting the lightwave polarization degree of freedom. Part of the VECSEL output, which is forced to be linearly polarized, is reinjected into the optical amplifier after a delay time and rotating its polarization state by 90º. In the active medium, both polarizations interact via cross-gain modulation. A comprehensive time-domain model including polarization and carrier spin dynamics is derived from fundamental principles. The model is used to evaluate the feasibility and robustness of the ML scheme. We obtain mode-locked pulses of ~10-ps duration at repetition
rates up to 20 GHz. The reinjection delay time defines resonance conditions where the maximum power and shortest pulsewidth are obtained. Stable fundamentalMLis surrounded by regimes of harmonic and incomplete ML.Atransition leading from self-pulsation to ML is obtained for sufficiently long reinjection delay times.

BibTeX:

@article{IMEDEA_intranet:10127,

  author = {Josep Mulet and Julien Javaloyes and Salvador Balle},

  title = {Mode-Locking of VECSELs by Crossed-Polarization Gain Modulation},

  journal = {IEEE Journal of Quantum Electronics},

  year = {2007},

  volume = {43},

  number = {9},

  pages = {786--793},

  url = {http://www.imedea.uib.es/pub_download.php?id=10127}

}

Tessone, Claudio Juan; Scirè, Alessandro; Toral, Raul & Colet, Pere Theory of collective firing induced by noise or diversity in excitable media 2007 Physical Review E - Statistical, Nonlinear, and Soft Matter Physics
Vol. 75, pp. 016203 (1-5) 
article URL 
Abstract: Large variety of physical, chemical, and biological systems show excitable behavior, characterized by a nonlinear response under external perturbations: only perturbations exceeding a threshold induce a full system response (firing). It has been reported that in coupled excitable identical systems noise may induce the simultaneous firing of a macroscopic fraction of units. However, a comprehensive understanding of the role of noise and that of natural diversity present in realistic systems is still lacking. Here we develop a theory for the emergence of collective firings in nonidentical excitable systems subject to noise. Three different dynamical regimes arise: subthreshold motion, where all elements remain confined near the fixed point; coherent pulsations, where a macroscopic fraction fire simultaneously; and incoherent pulsations, where units fire in a disordered fashion. We also show that the mechanism for collective firing is generic: it arises from degradation of entrainment originated either by noise or by diversity.
BibTeX:

@article{IMEDEA_intranet:1449,

  author = {Tessone, Claudio Juan and Scirè, Alessandro and Toral, Raul and Colet, Pere},

  title = {Theory of collective firing induced by noise or diversity in excitable media},

  journal = {Physical Review E - Statistical, Nonlinear, and Soft Matter Physics},

  year = {2007},

  volume = {75},

  pages = {016203 (1--5)},

  url = {http://www.imedea.uib.es/pub_download.php?id=1449}

}

Marino, Francesco; Marin, Francesco; Balle, Salvador & Piro, Oreste Chaotically spiking canards in an excitable system with 2D inertial fast manifolds 2007 Physical Review Letters
Vol. 98, pp. 074104 
article URL 
Abstract:

We introduce a new class of excitable systems with two-dimensional fast dynamics that includes inertia. A novel transition from excitability to relaxation oscillations is discovered where the usual Hopf bifurcation is followed by a cascade of period doubled and chaotic small excitable attractors and, as they grow, by a new type of canard explosion where a small chaotic background erratically but deterministically triggers excitable spikes. This scenario is also found in a model for a nonlinear Fabry-Perot cavity with one pendular mirror.

BibTeX:

@article{IMEDEA_intranet:1821,

  author = {Marino, Francesco and Marin, Francesco and Balle, Salvador and Piro, Oreste},

  title = {Chaotically spiking canards in an excitable system with 2D inertial fast manifolds},

  journal = {Physical Review Letters},

  year = {2007},

  volume = {98},

  pages = {074104},

  url = {http://www.imedea.uib.es/pub_download.php?id=1821}

}

Mulet, J.; Giudici, M.; Javaloyes, J. & Balle, S. Square-wave switching by crossed-polarization gain modulation in vertical-cavity semiconductor lasers 2007 Phys. Rev. A
Vol. 76, pp. 043801 
article DOI URL 
BibTeX:

@article{PhysRevA.76.043801,

  author = {Mulet, J. and Giudici, M. and Javaloyes, J. and Balle, S.},

  title = {Square-wave switching by crossed-polarization gain modulation in vertical-cavity semiconductor lasers},

  journal = {Phys. Rev. A},

  publisher = {American Physical Society},

  year = {2007},

  volume = {76},

  pages = {043801},

  url = {http://link.aps.org/doi/10.1103/PhysRevA.76.043801},

  doi = {http://dx.doi.org/10.1103/PhysRevA.76.043801}

}

Mulet, J. & Balle, S. Modeling and optimization of vertical-external-cavity surface-emitting diode lasers for passive mode-locking 2006 Proceedings of the SPIE
Vol. 6184(6184), pp. 61841B 
inproceedings DOI URL 
Abstract:

We present a comprehensive description of electrically-driven vertical-external-cavity surface-emitting diode lasers (VECSELs) at 980nm, mode-locked by saturable absorber mirrors. A novel partially-integrated time-domain model combines accuracy and flexibility, allowing for a semi-analytical stability analysis of the compoundcavity modes, tracking the mode-locking onset and an optimization analysis. The linear stability analysis of the compound-cavity modes indicates that single mode solutions exist and are stable only in a limited current range around threshold. Increasing the current above this current level leads to a multimode solution through a Hopf bifurcation. This bifurcation point is followed by a continuous transition leading from harmonic oscillations to fully-developed pulses that correspond to the mode-locked solution. We obtain stable, fully-developed modelocked pulses of few tens of picoseconds at 15 GHz repetition rate in good agreement with reported experimental results. We discuss the dependence of the mode-locking regimes on the reflectivity of the distributed Bragg reflectors, spot area of the spatial mode, and number of quantum wells in the emitter and absorber cavities. The optimization analysis reveals that, in order to favor the mode-locking onset, the effective coupling between the emitter and saturable absorber cavities has to be optimized through the standing wave pattern in the composite cavity and spot-area of the spatial modes.

BibTeX:

@inproceedings{IMEDEA_intranet:1696,

  author = {Mulet, J. and Balle, S.},

  title = {Modeling and optimization of vertical-external-cavity surface-emitting diode lasers for passive mode-locking},

  journal = {Proceedings of the SPIE},

  year = {2006},

  volume = {6184},

  number = {6184},

  pages = {61841B},

  url = {http://www.imedea.uib.es/pub_download.php?id=1696},

  doi = {http://link.aip.org/link/doi/10.1117/12.661774}

}

Scirè, A; Sorel, M; Giuliani, G; Colet, P; Pérez, Toni & Mirasso, C.R. All-optical two-mode switching in semiconductor ring lasers 2006 invalid journal  inproceedings URL 
Abstract: We have theoretically investigated the bifurcation scenario that leads to the emergence of a bistable regime in a two-mode model for a Semiconductor Ring Laser. The bistability takes place between two quasi-unidirectional solutions for the electric field, which are selected as stable solutions via gain-crossaturation, for well-above threshold operating conditions. Furthermore, we analyzed the switching properties of a single Semiconductor Ring Laser (SRL) operating in the bistable regime, under coherent optical pulse injection, in view of the possible implementation of a single SRL an optically adressable memory element. The result is that the response time and the minimum switching energy respectively attain values the order of a few tenth of ps, and 1 fJ. Those values are espected to scale down with the device radius, due to the consequent decreasing of the cavity flight time. We have observed that the fast switching dynamic is due to an energy redistribution process between the two counterpropagating modes, that does not involve the (slow) carrier density through field-medium energy exchange processes. This allows to attain time scales much faster than the typical limit represented by the inverse of relaxation oscillation frequency.
BibTeX:

@inproceedings{IMEDEA_intranet:1697,

  author = {Scirè, A and Sorel, M and Giuliani, G and Colet, P and Pérez, Toni and Mirasso, C.R.},

  title = {All-optical two-mode switching in semiconductor ring lasers},

  journal = {invalid journal},

  year = {2006},

  url = {http://www.imedea.uib.es/pub_download.php?id=1697}

}

Scirè, A; Sorel, M; Colet, P; Tessone, C.J.; Mirasso, C.R & San Miguel, M Two-mode dynamics in different semiconductor laser structures 2006 invalid journal  inproceedings URL 
Abstract: We review three two-mode models for different semiconductor laser structures: Vertical-Cavity Surface-Emitting Lasers (VCSELs), Twin-Stripe Semiconductor-Lasers (TSSL), and Semiconductor Ring Lasers (SRL). The VCSELs model and TSSL model display rich dynamic behavior when a saturable absorber is embedded in the cavity. VCSELs with saturable absorber showed polarization chaos, which found applications in encoded communications; TSSLs with saturable absorber show coherent locked states as well as chaotic behavior; and SRLs show a complex two-mode dynamics giving rise to bidirectional operation, alternate oscillations and spontaneous symmetry breaking toward quasi-unidirectional bistable solutions, with potential applications to all-optical switching.
BibTeX:

@inproceedings{IMEDEA_intranet:1698,

  author = {Scirè, A and Sorel,M and Colet,P and Tessone,C.J. and Mirasso, C.R and San Miguel,M},

  title = {Two-mode dynamics in different semiconductor laser structures},

  journal = {invalid journal},

  year = {2006},

  url = {http://www.imedea.uib.es/pub_download.php?id=1698}

}

Giuliani, G; Scirè, A; Sorel, M & Donati, S Linewidth of monolithic semiconductor ring lasers 2006 invalid journal  inproceedings URL 
Abstract: In this work we numerically calculate the linewidth of a single-mode monolithic Semiconductor Ring Laser (SRL) operating in the unidirectional regime. A new expression for the SRL linewidth is derived from the conventional Henrys formula, and the importance of different physical parameters is discussed. In particular, the linewidth is mainly determined by the SRL diameter, because the waveguide bending loss have a very strong dependence on the diameter. We show that circular SRLs with diameter smaller than 180 μm are unlikely to be operated CW. As a general rule, the linewidth decreases for increasing SRL diameter, and it varies from 15 MHz for 200 μm diameter down to 1 MHz for 2000 μm diameter.
BibTeX:

@inproceedings{IMEDEA_intranet:1699,

  author = {Giuliani,G and Scirè, A and Sorel,M and Donati,S},

  title = {Linewidth of monolithic semiconductor ring lasers},

  journal = {invalid journal},

  year = {2006},

  url = {http://www.imedea.uib.es/pub_download.php?id=1699}

}

Furst, A; Sorel, M; Scirè, A; Giuliani, G & Yu, S Technological challenges for CW operation of small-radius semiconductor ring lasers 2006 invalid journal  inproceedings URL 
Abstract: Theoretical investigation and device measurements are reported to demonstrate the strict fabrication requirements of small diameter shallow etched semiconductor ring lasers. A very accurate control over the dry etching depth is crucial to both minimise the bending losses and achieve very precise control of the coupling ratio in directional couplers. A reactive ion etching process was developed on Aluminium-quaternary wafer structures, showing selectivity greater than 30 between the AlInAs core layer and the InP upper cladding. The process proved very effective in providing a complete and controllable etching of directional couplers with 500nm wide gaps. Assessment on the effect of the bending losses and on the minimum ring radius was performed through characterisation of half ring lasers. A minimum current threshold of 34mA is reported on 150μm ring radius devices emitting at 1300nm.
BibTeX:

@inproceedings{IMEDEA_intranet:1700,

  author = {Furst,A and Sorel,M and Scirè,A and Giuliani,G and Yu,S},

  title = {Technological challenges for CW operation of small-radius semiconductor ring lasers},

  journal = {invalid journal},

  year = {2006},

  url = {http://www.imedea.uib.es/pub_download.php?id=1700}

}

Pedaci, Francesco; Lepri, Stefano; Balle, Salvador; Giacomelli, Giovanni; Giudici, Massimo & Tredicce, Jorge R. Multiplicative noise in the longitudinal mode dynamics of a bulk semiconductor laser 2006 Physical Review E - Statistical, Nonlinear, and Soft Matter Physics
Vol. 73, pp. 041101 
article URL 
Abstract:

We analyze theoretically and experimentally the influence of current noise on the longitudinal mode hopping dynamics of a bulk semiconductor laser. It is shown that the mean residence times on each mode have different sensitivity to external noise added to the bias current. In particular, an increase of the noise level enhances the residence time on the longitudinal mode that dominates at low current, evidencing the multiplicative nature of the stochastic process. A two-mode rate equation model for a semiconductor laser is able to reproduce the experimental findings. Under a suitable separation of the involved time scales, the model can be reduced to a one-dimensional bistable potential system with a multiplicative stochastic term related to the current noise strength. The reduced model clarifies the influence of the different noise sources on the hopping dynamics.

BibTeX:

@article{IMEDEA_intranet:1723,

  author = {Pedaci, Francesco and Lepri, Stefano and Balle, Salvador and Giacomelli, Giovanni and Giudici, Massimo and Tredicce, Jorge R.},

  title = {Multiplicative noise in the longitudinal mode dynamics of a bulk semiconductor laser},

  journal = {Physical Review E - Statistical, Nonlinear, and Soft Matter Physics},

  year = {2006},

  volume = {73},

  pages = {041101},

  url = {http://www.imedea.uib.es/pub_download.php?id=1723}

}

Van der Sande, Guy; Peeters, Michael; Veretennicoff, Irina; Danckaert, Jan; Verschaffelt, Guy & Balle, Salvador The effects of Stress, Temperatue and Spin Flips on Polarization Switching in VCSELS 2006 IEEE Journal of Quantum Electronics
Vol. 42, pp. 896-904 
article URL 
Abstract:

We discuss the effect of uniaxial planar stress on polarization switching in vertical-cavity surface-emitting lasers (VCSELs). The approach is based on an explicit form of a frequency-dependent complex susceptibility of the uniaxially stressed quantum-well semiconductor material. In this mesoscopic framework, we have taken cavity anisotropies, spin carrier dynamics, and thermal shift of the gain curve into account. In this way, we present a model that provides a global overview of the polarization switching phenomenon. The results are compared with experiments on an air-post VCSEL operating at 980 nm.

BibTeX:

@article{IMEDEA_intranet:1770,

  author = {Van der Sande, Guy and Peeters, Michael and Veretennicoff, Irina and Danckaert, Jan and Verschaffelt, Guy and Balle, Salvador},

  title = {The effects of Stress, Temperatue and Spin Flips on Polarization Switching in VCSELS},

  journal = {IEEE Journal of Quantum Electronics},

  year = {2006},

  volume = {42},

  pages = {896--904},

  url = {http://www.imedea.uib.es/pub_download.php?id=1770}

}

Javaloyes, Julien; Mulet, Josep & Balle, Salvador Passive Mode Locking of Lasers by Crossed-Polarization Gain Modulation 2006 Physical Review Letters
Vol. 97, pp. 163902 
article URL 
Abstract:

We report on a novel approach for inducing passive mode locking of lasers without using any saturable absorber but exploiting the polarization degree of freedom of light. In our scheme, passive mode locking is achieved by crossed-polarization gain modulation caused by the reinjection of a polarization-rotated replica of the laser output after a time delay. The reinjection time delay defines resonance tongues that correspond to mode-locking operation. Numerical continuation reveals that the cw solution is destabilized through a Hopf bifurcation that defines the onset of multimode operation which evolves sharply into a mode-locked solution. Our approach can be applied to a large variety of laser systems. For vertical-cavity surface-emitting lasers, we demonstrate stable mode-locked pulses at repetition rates in the GHz range and pulse widths of few tens of picoseconds.

BibTeX:

@article{IMEDEA_intranet:1791,

  author = {Javaloyes, Julien and Mulet, Josep and Balle, Salvador},

  title = {Passive Mode Locking of Lasers by Crossed-Polarization Gain Modulation},

  journal = {Physical Review Letters},

  year = {2006},

  volume = {97},

  pages = {163902},

  url = {http://www.imedea.uib.es/pub_download.php?id=1791}

}

Gattobigio, G. L.; Michaud, F.; Javaloyes, J.; Tabosa, J. W. R. & Kaiser, R. Bunching-induced asymmetry in degenerate four-wave mixing with cold atoms 2006 Phys. Rev. A
Vol. 74, pp. 043407 
article DOI URL 
BibTeX:

@article{PhysRevA.74.043407,

  author = {Gattobigio, G. L. and Michaud, F. and Javaloyes, J. and Tabosa, J. W. R. and Kaiser, R.},

  title = {Bunching-induced asymmetry in degenerate four-wave mixing with cold atoms},

  journal = {Phys. Rev. A},

  publisher = {American Physical Society},

  year = {2006},

  volume = {74},

  pages = {043407},

  url = {http://link.aps.org/doi/10.1103/PhysRevA.74.043407},

  doi = {http://dx.doi.org/10.1103/PhysRevA.74.043407}

}

Javaloyes, J.; Perrin, M.; Lippi, G.L. & Politi, A. Coherent light emission by self-induced spatial longitudinal patterns in a Rb85 molasses 2005 Quantum Electronics Conference, 2005. EQEC '05. European, pp. 110  inproceedings DOI  
Abstract: This experiment investigates coherent light emission by self-induced spatial longitudinal patterns in an optically cooled Rb85 molasses. This work adapts the CARL model to include a ring cavity while taking into account the specific nature of the interaction with the Doppler beams (noise included). Taking advantage of the very different natural time scales present in the experiment, the dimensionality of the problem has been reduced. The resulting, strongly reduced model, consists of a Fokker-Planck equation for the probability distribution of atomic positions and momenta, coupled to two ordinary differential equations describing the evolution of the counter propagating fields in the resonator.
BibTeX:

@inproceedings{1567281,

  author = {Javaloyes, J. and Perrin, M. and Lippi, G.L. and Politi, A.},

  title = {Coherent light emission by self-induced spatial longitudinal patterns in a Rb85 molasses},

  booktitle = {Quantum Electronics Conference, 2005. EQEC '05. European},

  year = {2005},

  pages = { 110},

  doi = {http://dx.doi.org/10.1109/EQEC.2005.1567281}

}

Hachair, X.; Furfaro, L.; Javaloyes, J.; Guidici, M.; Balle, S.; Tredicce, J.; Tissoni, G.; Lugiato, L.A.; Brambilla, M. & Maggipinto, T. Cavity soliton switching in semiconductor microresonators 2005 Quantum Electronics Conference, 2005. EQEC '05. European, pp. 128  inproceedings DOI  
Abstract: This work experimentally and numerically investigates the cavity solitons switch-on process in semiconductor microresonators. This is a highly relevant feature to applications since its duration determines the maximum speed at which the device can be addressed. Numerical simulations show a very good agreement with the experimental findings, both from the qualitative and quantitative viewpoints.
BibTeX:

@inproceedings{1567299,

  author = {Hachair, X. and Furfaro, L. and Javaloyes, J. and Guidici, M. and Balle, S. and Tredicce, J. and Tissoni, G. and Lugiato, L.A. and Brambilla, M. and Maggipinto, T.},

  title = {Cavity soliton switching in semiconductor microresonators},

  booktitle = {Quantum Electronics Conference, 2005. EQEC '05. European},

  year = {2005},

  pages = { 128},

  doi = {http://dx.doi.org/10.1109/EQEC.2005.1567299}

}

F., Marino; L., Furfaro & S., Balle Cross gain modulation in broad area vertical cavity semiconductor amplifier 2005 Applied Physics Letters
Vol. 86, pp. 151116 
article URL 
Abstract:

We demonstrate that broad-area vertical-cavity semiconductor optical amplifiers allow for wavelength conversion at 2.5 Gb/ s via cross-gain modulation sXGMd. XGM is reached with a saturation beam of only 1.5 mW over an optical bandwidth of 0.7 nm s215 GHzd. Depending on the wavelengths of the injected fields, inverted or noninverted output can be obtained.

BibTeX:

@article{IMEDEA_intranet:1186,

  author = {Marino F. and Furfaro L. and Balle S.},

  title = {Cross gain modulation in broad area vertical cavity semiconductor amplifier},

  journal = {Applied Physics Letters},

  year = {2005},

  volume = {86},

  pages = {151116},

  url = {http://www.imedea.uib.es/pub_download.php?id=1186}

}

Scirè, Alessandro; Tessone, Claudio J. & Colet, Pere Dynamics of Coupled Self-Pulsating Semiconductor Lasers 2005 IEEE Journal of Quantum Electronics
Vol. 41, pp. 272-279 
article URL 
Abstract: We introduce and analyze a model for the dynamics of two coupled self-pulsating semiconductor lasers. We investigate the role of the complex coupling coefficient in the static and dynamic properties of the device. We find conditions for the emergence of coherent laser pulses, in which the two lasers display synchronous coherent self-pulsations (self-pulsating super-modes). Non-linear dynamics and two different routes to chaos are also individuated and discussed.
BibTeX:

@article{IMEDEA_intranet:1199,

  author = {Scirè, Alessandro and Tessone, Claudio J. and Colet, Pere},

  title = {Dynamics of Coupled Self-Pulsating Semiconductor Lasers},

  journal = {IEEE Journal of Quantum Electronics},

  year = {2005},

  volume = {41},

  pages = {272--279},

  url = {http://www.imedea.uib.es/pub_download.php?id=1199}

}

Giuliani, G; Miglierina, R; Sorel, M & Scirè, A Self- and Cross-Correlation Measurements of Counterpropagating Modes in GaAs/AlGaAs Semiconductor Ring Laser 2005 invalid journal
Vol. 11, pp. 1187-1192 
article URL 
BibTeX:

@article{IMEDEA_intranet:1263,

  author = {Giuliani,G and Miglierina,R and Sorel,M and Scirè,A},

  title = {Self- and Cross-Correlation Measurements of Counterpropagating Modes in GaAs/AlGaAs Semiconductor Ring Laser},

  journal = {invalid journal},

  year = {2005},

  volume = {11},

  pages = {1187--1192},

  url = {http://www.imedea.uib.es/pub_download.php?id=1263}

}

F., Marino & S., Balle Excitable optical waves in semiconductor microcavities 2005 Physical Review Letters
Vol. 94, pp. 094101 
article URL 
Abstract:

We demonstrate experimentally and theoretically the existence of excitable optical waves in semiconductor microcavities. Although similar to those observed in biological and chemical systems, these excitable optical waves are self-confined. This is due to a new dynamical scenario, where a stationary Turing pattern controls the propagation of waves in an excitable medium, thus bringing together the two paradigms of dynamical behavior (waves and patterns) in active media.

BibTeX:

@article{IMEDEA_intranet:1396,

  author = {Marino F. and Balle S.},

  title = {Excitable optical waves in semiconductor microcavities},

  journal = {Physical Review Letters},

  year = {2005},

  volume = {94},

  pages = {094101},

  url = {http://www.imedea.uib.es/pub_download.php?id=1396}

}

Furfaro, L; Pedaci, F; Javaloyes, J; Hachair, X; Giudici, M; Balle, S; Tredicce & J. Modal Switching in Quantum-Well Semiconductor Lasers With Weak Optical Feedback 2005 IEEE Journal of Quantum Electronics
Vol. 41, pp. 609-618 
article URL 
Abstract:

We analyze theoretically and experimentally how the
modal dynamics of quantum-well semiconductor lasers is affected
by weak optical feedback. Without feedback, these lasers exhibit
a regular switching among several longitudinal modes, following
a well determined modal sequence and leaving the total intensity
output constant. Using a multimode theoretical model we have
identified the four wave mixing as the dominant mechanism at
the origin of these intriguing dynamics, while the asymmetry of
the susceptibility function of semiconductor materials allows to
explain the modal sequence. In this manuscript we show that
these dynamics, which is almost insensitive to current noise or
modulation, is instead extremely sensitive to optical feedback. The
experimental results are satisfactorily compared with the numerical
predictions of the model, properly adapted for including weak
optical feedback.

BibTeX:

@article{IMEDEA_intranet:1438,

  author = {Furfaro, L and Pedaci, F and Javaloyes, J and Hachair, X and Giudici, M and Balle,S and Tredicce and J.},

  title = {Modal Switching in Quantum-Well Semiconductor Lasers With Weak Optical Feedback},

  journal = {IEEE Journal of Quantum Electronics},

  year = {2005},

  volume = {41},

  pages = {609--618},

  url = {http://www.imedea.uib.es/pub_download.php?id=1438}

}

Mulet, Josep & Balle, Salvador Mode-locking dynamics in electrically-driven vertical-external-cavity surface-emitting lasers 2005 IEEE Journal of Quantum Electronics
Vol. 41, pp. 1148-1156 
article URL 
Abstract:

We develop a novel description of electrically-driven vertical-external-cavity surface-emitting semiconductor lasers (VECSELs) mode-locked by saturable absorber mirrors. Our approach is based on an analytical solution of the bidirectional traveling-wave equations for fundamental transverse mode operation. The resulting time-domain equations describe the evolution of the electric fields and carrier-densities at the quantum well layers of the emitter and absorber structures which are coupled through delayed boundary conditions. For the design considered, we obtain stable mode-locked pulses of few tens of picoseconds at 15 GHz repetition rate in agreement with recently reported experimental results.

BibTeX:

@article{IMEDEA_intranet:1443,

  author = {Mulet, Josep and Balle, Salvador},

  title = {Mode-locking dynamics in electrically-driven vertical-external-cavity surface-emitting lasers},

  journal = {IEEE Journal of Quantum Electronics},

  year = {2005},

  volume = {41},

  pages = {1148--1156},

  url = {http://www.imedea.uib.es/pub_download.php?id=1443}

}

Barland, S.; Hachair, X.; Giudici, M.; Balle, S.; Tredicce, J.R. Tissoni, G.; Spinelli, L.; Lugiato, L. & Brambilla, M. Spatial decorrelation in broad-area edge-emitting semiconductor amplifiers 2005 European Physical Journal D
Vol. 32, pp. 75-82 
article URL 
Abstract:

We analyze experimentally the spatio-temporal dynamics of the transverse structures appearing in broad area edge-emitting semiconductor amplifiers under CW optical injection. We demonstrate that, in certain conditions, the light reflected by the system exhibits a multipeaked structure whose dependence on the parameters suggests an interpretation in terms of cavity solitons. These structures can exhibit self-pulsations with periods of the order of few milliseconds, which we explain in terms of regenerative thermal oscillations. In a particular device, we generate two single-peak structures which are spatially uncorrelated, as required for cavity solitons. A microscopic model shows good agreement with the main body of the experimental results.

BibTeX:

@article{IMEDEA_intranet:1458,

  author = {Barland, S. and Hachair, X. and Giudici, M. and Balle, S. and Tredicce, J.R. Tissoni, G. and Spinelli, L. and Lugiato, L. and Brambilla, M.},

  title = {Spatial decorrelation in broad-area edge-emitting semiconductor amplifiers},

  journal = {European Physical Journal D},

  year = {2005},

  volume = {32},

  pages = {75--82},

  url = {http://www.imedea.uib.es/pub_download.php?id=1458}

}

van der Sande, G.; Danckaert, J.; Veretennicoff, I.; Panajotov, K. & Balle, S. Analytical approximation for the quantum-well gain and refractive-index spectra of vertical-cavity surface-emitting lasers including the effect of uniaxial planar stress 2005 Physical Review A - Atomic, Molecular, and Optical Physics
Vol. 71, pp. 063801 
article URL 
Abstract:

Starting from a microscopic model in the free-carrier approximation, we derive an analytical approximation for the optical susceptibility of uniaxially stressed quantum-well lasers at low temperatures by neglecting second-order contributions of the band-mixing phenomenon. The resulting polarization-dependent peak gains, differential peak gains, transparency carrier densities, and linewidth enhancement factors as induced by the uniaxial planar stress are discussed.

BibTeX:

@article{IMEDEA_intranet:1566,

  author = {van der Sande, G. and Danckaert, J. and Veretennicoff, I. and Panajotov, K. and Balle, S.},

  title = {Analytical approximation for the quantum-well gain and refractive-index spectra of vertical-cavity surface-emitting lasers including the effect of uniaxial planar stress},

  journal = {Physical Review A - Atomic, Molecular, and Optical Physics},

  year = {2005},

  volume = {71},

  pages = {063801},

  url = {http://www.imedea.uib.es/pub_download.php?id=1566}

}

Kinast, Joseph; Turlapov, Andrey; Thomas, John E.; Javaloyes, Julien; Courteille, Philippe W.; Perrin, Mathias; Lippi, Gian Luca & Politi, Antonio Cooling and Trapping 2005 Optics & Photonics News
Vol. 16(12), pp. 21-22 
article DOI URL 
BibTeX:

@article{kinast:21,

  author = {Joseph Kinast and Andrey Turlapov and John E. Thomas and Julien Javaloyes and Philippe W. Courteille and Mathias Perrin and Gian Luca Lippi and Antonio Politi},

  title = {Cooling and Trapping},

  journal = {Optics & Photonics News},

  publisher = {OSA},

  year = {2005},

  volume = {16},

  number = {12},

  pages = {21-22},

  url = {http://www.opticsinfobase.org/abstract.cfm?URI=OPN-16-12-21},

  doi = {http://dx.doi.org/10.1364/OPN.16.12.000021}

}

Hachair, X.; Furfaro, L.; Javaloyes, J.; Giudici, M.; Balle, S.; Tredicce, J.; Tissoni, G.; Lugiato, L. A.; Brambilla, M. & Maggipinto, T. Cavity-solitons switching in semiconductor microcavities 2005 Phys. Rev. A
Vol. 72, pp. 013815 
article DOI URL 
BibTeX:

@article{PhysRevA.72.013815,

  author = {Hachair, X. and Furfaro, L. and Javaloyes, J. and Giudici, M. and Balle, S. and Tredicce, J. and Tissoni, G. and Lugiato, L. A. and Brambilla, M. and Maggipinto, T.},

  title = {Cavity-solitons switching in semiconductor microcavities},

  journal = {Phys. Rev. A},

  publisher = {American Physical Society},

  year = {2005},

  volume = {72},

  pages = {013815},

  url = {http://link.aps.org/doi/10.1103/PhysRevA.72.013815},

  doi = {http://dx.doi.org/10.1103/PhysRevA.72.013815}

}

Furfaro, Luca; Yacomotti, Alejandro; Pedaci, Francesco; Hachair, Xavier; Javaloyes, Julien; Giudici, Massimo; Tredicce, Jorge R.; Balle, Salvador; Mandel, Paul & Viktorov, Evgeny Multimode dynamics of semiconductor lasers 2004 Semiconductor Lasers and Laser Dynamics
Vol. 5452(1), pp. 411-421 
conference DOI URL 
BibTeX:

@conference{furfaro:411,

  author = {Luca Furfaro and Alejandro Yacomotti and Francesco Pedaci and Xavier Hachair and Julien Javaloyes and Massimo Giudici and Jorge R. Tredicce and Salvador Balle and Paul Mandel and Evgeny Viktorov},

  title = {Multimode dynamics of semiconductor lasers},

  journal = {Semiconductor Lasers and Laser Dynamics},

  publisher = {SPIE},

  year = {2004},

  volume = {5452},

  number = {1},

  pages = {411-421},

  url = {http://link.aip.org/link/?PSI/5452/411/1},

  doi = {http://dx.doi.org/10.1117/12.545514}

}

Marzena, Ciszak; Francesco, Marino; Raúl, Toral & Salvador, Balle Dynamical mechanism of anticipating synchronization in excitable systems 2004 Physical Review Letters
Vol. 93, pp. 114102 
article URL 
Abstract:

We analyze the phenomenon of anticipating synchronization of two excitable systems with unidirectional
delayed coupling which are subject to the same external forcing. We demonstrate for different
paradigms of excitable system that, due to the coupling, the excitability threshold for the slave system is
always lower than that for the master. As a consequence the two systems respond to a common external
forcing with different response times. This allows us to explain in a simple way the mechanism behind
the phenomenon of anticipating synchronization in excitable systems.

BibTeX:

@article{IMEDEA_intranet:1000,

  author = {Ciszak Marzena and Marino Francesco and Toral Raúl and Balle Salvador},

  title = {Dynamical mechanism of anticipating synchronization in excitable systems},

  journal = {Physical Review Letters},

  year = {2004},

  volume = {93},

  pages = {114102},

  url = {http://www.imedea.uib.es/pub_download.php?id=1000}

}

F., Marino & S., Balle Experimental study of a broad area vertical-cavity semiconductor optical amplifier 2004 Optics Communications
Vol. 231, pp. 325-330 
article URL 
Abstract:

An experimental study of a broad-area vertical-cavity semiconductor optical amplifier in the 980 nm wavelength
range is reported. We show that the gain and the saturation power in such a device increase as the transverse dimension
of the injected beam is increased. A gain of 16.3 dB with 0.8 nm optical bandwidth and saturation power of 1.4 mW has
been obtained. The polarization sensitivity of the device is also studied. We show that birefringence in the cavity affects
the polarization insensitivity expected in ideal devices as a consequence of the circular symmetry of the cavity. A brief
study of the wavelength dependence of the output transverse profile is also reported.

BibTeX:

@article{IMEDEA_intranet:1005,

  author = {Marino F. and Balle S.},

  title = {Experimental study of a broad area vertical-cavity semiconductor optical amplifier},

  journal = {Optics Communications},

  year = {2004},

  volume = {231},

  pages = {325--330},

  url = {http://www.imedea.uib.es/pub_download.php?id=1005}

}

F., Marino; G., Catalan; P., Sanchez; S., Balle & O., Piro Thermo-optical canard-orbits and excitable limit cycles 2004 Physical Review Letters
Vol. 92, pp. 073901 
article URL 
Abstract:

We demonstrate experimentally and theoretically the existence of canard orbits and excitable
quasiharmonic limit cycles in the thermo-optical dynamics of semiconductor optical amplifiers. We
also observe the phase locking of the noise-induced spikes to the small-amplitude Hopf quasiharmonic
oscillations, recently predicted by Makarov, Nekorkin, and Velarde [Phys. Rev. Lett. 86, 3431 (2001)].

BibTeX:

@article{IMEDEA_intranet:1006,

  author = {Marino F. and Catalan G. and Sanchez P. and Balle S. and Piro O.},

  title = {Thermo-optical canard-orbits and excitable limit cycles},

  journal = {Physical Review Letters},

  year = {2004},

  volume = {92},

  pages = {073901},

  url = {http://www.imedea.uib.es/pub_download.php?id=1006}

}

A.Scirè, P.Colet, M. San Miguel Phase Synchronization and Polarization Ordering of Globally Coupled Oscillators 2004 Physical Review E - Statistical, Nonlinear, and Soft Matter Physics
Vol. 70, pp. 035201(R) (1-4) 
article URL 
Abstract: We introduce a prototype model for globally-coupled oscillators in which each element is given an oscillation frequency and a preferential oscillation direction (polarization), both randomly distributed. We found two collective transitions: to phase synchronization and to polarization ordering. Introducing a global-phase and a polarization order parameters, we show that the transition to global-phase synchrony is found when the coupling overcomes a critical value and that polarization order enhancement can not take place before global-phase synchrony. We develop a self-consistent theory to determine both order parameters in good agreement with numerical results.
BibTeX:

@article{IMEDEA_intranet:1064,

  author = {A.Scirè, P.Colet,M. San Miguel},

  title = {Phase Synchronization and Polarization Ordering of Globally Coupled Oscillators},

  journal = {Physical Review E - Statistical, Nonlinear, and Soft Matter Physics},

  year = {2004},

  volume = {70},

  pages = {035201(R) (1--4)},

  url = {http://www.imedea.uib.es/pub_download.php?id=1064}

}

Scirè, A.; Mulet, J.; Mirasso, C.R. & San Miguel, M. Modeling of Vertical-Cavity Surface Emitting Lasers: State of The Art and New Results 2004 invalid journal
Vol. 15, pp. 21-26 
article URL 
BibTeX:

@article{IMEDEA_intranet:1065,

  author = {Scirè, A. and Mulet, J. and Mirasso, C.R. and San Miguel, M.},

  title = {Modeling of Vertical-Cavity Surface Emitting Lasers: State of The Art and New Results},

  journal = {invalid journal},

  year = {2004},

  volume = {15},

  pages = {21--26},

  url = {http://www.imedea.uib.es/pub_download.php?id=1065}

}

Sondermann, Markus; Ackemann, Thorsten; Balle, Salvador; Mulet, Josep & Panajotov, Krassimir Experimental and theoretical investigations on elliptically polarized dynamical transition states in the polarization switching of vertical-cavity surface-emitting lasers 2004 Optics Communications
Vol. 235, pp. 421-434 
article URL 
Abstract:

The existence region of elliptically polarized dynamical states in the polarization dynamics of vertical-cavity surface emitting lasers is investigated experimentally and theoretically. These states can occur in the vicinity of a polarization switching from the fundamental transverse mode with lower emission frequency to the mode with higher frequency. It is demonstrated experimentally that these states may occur in a single as well as in a double switching scenario. The existence of the dynamical states is shown to be independent from the ellipticity of the state of polarization at the lasing threshold. Furthermore, the in uence of the detuning between the band gap and the cavity resonance on the occurrence of the dynamical states is investigated.

BibTeX:

@article{IMEDEA_intranet:1066,

  author = {Sondermann, Markus and Ackemann, Thorsten and Balle, Salvador and Mulet, Josep and Panajotov, Krassimir},

  title = {Experimental and theoretical investigations on elliptically polarized dynamical transition states in the polarization switching of vertical-cavity surface-emitting lasers},

  journal = {Optics Communications},

  year = {2004},

  volume = {235},

  pages = {421--434},

  url = {http://www.imedea.uib.es/pub_download.php?id=1066}

}

Hachair, X.; Barland, S.; Furfaro, L..; Balle, S.; Tredicce, J.R.; Brambilla, M.; Maggipinto, T.; Perrini, I.M.; Tissoni, G. & Lugiato, L.A. Cavity solitons in broad-area vertical-cavity surface-emitting lasers below threshold 2004 Physical Review A - Atomic, Molecular, and Optical Physics
Vol. 69, pp. 043817 
article URL 
Abstract:

Cavity solitons are stationary self-organized bright intensity peaks which form over a homogeneous back-ground in the section of broad area radiation beams. They are generated by shining a writing/erasing laser pulse into a nonlinear optical cavity, driven by a holding beam. The ability to control their location and their motion by introducing phase or amplitude gradients in the holding beam makes them interesting as mobile pixels for all-optical processing units. We show the generation of a number of cavity solitons in broad-area vertical cavity semiconductor microresonators electrically pumped above transparency but slightly below threshold. We ana-lyze the switching process in details. The observed spots can be written, erased, and manipulated as indepen-dent objects, as predicted by the theoretical model. An especially tailored one is used to simulate the studied phenomena and to compare our simulations to the experimental findings with good agreement.

BibTeX:

@article{IMEDEA_intranet:1387,

  author = {Hachair, X. and Barland, S. and Furfaro, L.. and Balle, S. and Tredicce, J.R. and Brambilla, M. and Maggipinto, T. and Perrini, I.M. and Tissoni, G. and Lugiato, L.A.},

  title = {Cavity solitons in broad-area vertical-cavity surface-emitting lasers below threshold},

  journal = {Physical Review A - Atomic, Molecular, and Optical Physics},

  year = {2004},

  volume = {69},

  pages = {043817},

  url = {http://www.imedea.uib.es/pub_download.php?id=1387}

}

Yacomotti, A.; Furfaro, L.; Hachair, X.; Pedaci, F.; Giudici, M.; Tredicce, J.; Javaloyes, J.; Balle, S.; Viktorov, E.A. & Mandel, P. Dynamics of Multimode Semiconductor Lasers 2004 Physical Review A - Atomic, Molecular, and Optical Physics
Vol. 69, pp. 053816 
article URL 
Abstract:

We analyze multi-longitudinal-mode semiconductor lasers experimentally. We show that the intensity of each mode displays large amplitude oscillations but obeys a highly organized antiphase dynamics leading to an almost constant total intensity output. For each mode, regular switching is observed in the megahertz range, while the optical frequency as a function of time follows a well defined sequence from blue to red. Using a multimode theoretical model, we identify that four-wave mixing is the dominant mechanism at the origin of the observed dynamics. The asymmetry of the susceptibility function of semiconductor materials allows us to explain the optical frequency sequence.

BibTeX:

@article{IMEDEA_intranet:1388,

  author = {Yacomotti, A. and Furfaro, L. and Hachair, X. and Pedaci, F. and Giudici, M. and Tredicce, J. and Javaloyes, J. and Balle, S. and Viktorov, E.A. and Mandel, P.},

  title = {Dynamics of Multimode Semiconductor Lasers},

  journal = {Physical Review A - Atomic, Molecular, and Optical Physics},

  year = {2004},

  volume = {69},

  pages = {053816},

  url = {http://www.imedea.uib.es/pub_download.php?id=1388}

}

Furfaro, L; Pedaci, F; Giudici, M; Hachair, X; Tredicce, J & Balle, S. Mode-Switching in Semiconductor Lasers 2004 IEEE Journal of Quantum Electronics
Vol. 40, pp. 1365-1376 
article URL 
Abstract:

In this paper, we experimentally analyze the modal
dynamics of quantum-well semiconductor lasers. Modal switching
is the dominant feature for semiconductor lasers that exhibit two
or several active longitudinal modes in their time-averaged optical
spectrum. In quantum-well lasers, these dynamics involve a periodic
switching among several longitudinal modes, which follows a
well-determined sequence from the bluest to the reddest mode in
the optical spectrum. This feature is radically different from the
well-known noise-driven mode-hopping occurring in bulk lasers
which involves only two main modes. We analyze the differences
in modal dynamics for these two kinds of laser by comparing the
modal switching statistics and by studying the effects of noise and
modulation in the pumping current.

BibTeX:

@article{IMEDEA_intranet:1439,

  author = {Furfaro, L and Pedaci, F and Giudici, M and Hachair, X and Tredicce, J and Balle, S.},

  title = {Mode-Switching in Semiconductor Lasers},

  journal = {IEEE Journal of Quantum Electronics},

  year = {2004},

  volume = {40},

  pages = {1365--1376},

  url = {http://www.imedea.uib.es/pub_download.php?id=1439}

}

Eguiluz, Victor M.; Hernandez-Garcia, Emilio & Piro, Oreste Boundary-forced spatial chaos 2004 , pp. 205-212  inbook URL 
Abstract: We show that the presence of undulated boundaries
can induce the formation of spatially
chaotic, stationary, and stable structures in models as simple
as the Fisher-Kolmogorov equation, which does not display any
kind of chaos under common boundaries.

The files can be found
HERE.
BibTeX:

@inbook{IMEDEA_intranet:313,

  author = {Eguiluz, Victor M. and Hernandez-Garcia, Emilio and Piro, Oreste},

  title = {Boundary-forced spatial chaos},

  publisher = {Kluwer academic publishers, Dordrecht},

  year = {2004},

  pages = {205--212},

  url = {http://www.imedea.uib.es/pub_download.php?id=313}

}

Javaloyes, J.; Perrin, M.; Lippi, G. L. & Politi, A. Self-generated cooperative light emission induced by atomic recoil 2004 Phys. Rev. A
Vol. 70, pp. 023405 
article DOI URL 
BibTeX:

@article{PhysRevA.70.023405,

  author = {Javaloyes, J. and Perrin, M. and Lippi, G. L. and Politi, A.},

  title = {Self-generated cooperative light emission induced by atomic recoil},

  journal = {Phys. Rev. A},

  publisher = {American Physical Society},

  year = {2004},

  volume = {70},

  pages = {023405},

  url = {http://link.aps.org/doi/10.1103/PhysRevA.70.023405},

  doi = {http://dx.doi.org/10.1103/PhysRevA.70.023405}

}

Perrin, M.; Javaloyes, J.; Lippi, G.L. & Politi, A. Spontaneous generation of a density grating in atomic vapours interacting with a strong electromagnetic field 2003 Quantum Electronics Conference, 2003. EQEC '03. European, pp. 50  inproceedings DOI  
Abstract: This study shows that, for appropriate parameter values, a stable density grating can spontaneously emerge and be sustained over arbitrarily long times in a generalized model. The onset of a non-zero bunching is accompanied by a nonzero value of the coherence parameter. This regime, occurring at sufficiently low temperatures, is therefore characterized by both coherence and bunching-values different from zero. In order to shed some light on the role played by the two order parameters, the authors have reconstructed a detailed phase diagram by exploring their dependence on the pump intensity and on the temperature.
BibTeX:

@inproceedings{1313907,

  author = {Perrin, M. and Javaloyes, J. and Lippi, G.L. and Politi, A.},

  title = {Spontaneous generation of a density grating in atomic vapours interacting with a strong electromagnetic field},

  booktitle = {Quantum Electronics Conference, 2003. EQEC '03. European},

  year = {2003},

  pages = { 50},

  doi = {http://dx.doi.org/10.1109/EQEC.2003.1313907}

}

Barland, S.; Piro, O.; Giudici, M.; Tredicce, J.R. & Balle, S. Experimental evidence of van der Pol-Fitzhugh-Nagumo dynamics in semiconductor optical amplifiers 2003 Physical Review E - Statistical, Nonlinear, and Soft Matter Physics
Vol. 68, pp. 036209 
article URL 
Abstract:

Thermo-optical pulsing in semiconductor amplifiers is experimentally shown to correspond to a very com-mon excitable scenario ~the van der Pol Fitzhugh Nagumo system!. Self-sustained oscillations appear in the sequence predicted by this simple dynamical model as we change either the injection level or the bias current. Periodic modulation of these parameters leads to the characteristic phase-locking structure. Furthermore, co-herence resonance is observed when external noise is added to the system.

BibTeX:

@article{IMEDEA_intranet:1017,

  author = {Barland, S. and Piro, O. and Giudici, M. and Tredicce, J.R. and Balle, S.},

  title = {Experimental evidence of van der Pol-Fitzhugh-Nagumo dynamics in semiconductor optical amplifiers},

  journal = {Physical Review E - Statistical, Nonlinear, and Soft Matter Physics},

  year = {2003},

  volume = {68},

  pages = {036209},

  url = {http://www.imedea.uib.es/pub_download.php?id=1017}

}

Marino, Francesco; Barland, Stephan & Balle, Salvador Single-mode operation and transverse-mode control in VCSELs induced by frequency-selective feedback 2003 IEEE Photonics Technology Letters
Vol. 15, pp. 789-791 
article URL 
Abstract:

An experimental study of a vertical-cavity surfaceemitting
laser with frequency-selective feedback is reported. We
show that we can force the laser to emit in its fundamental transverse
mode or in a higher order transverse mode and that we can
also control the polarization emitted in the fundamental one. We
obtain single fundamental-mode operation within a large range of
injection current values (almost ~2.5 I_th) and a maximum optical
power of 2.7 mW. In this current range, the output is found to be
stable.

BibTeX:

@article{IMEDEA_intranet:1189,

  author = {Marino, Francesco and Barland, Stephan and Balle, Salvador},

  title = {Single-mode operation and transverse-mode control in VCSELs induced by frequency-selective feedback},

  journal = {IEEE Photonics Technology Letters},

  year = {2003},

  volume = {15},

  pages = {789--791},

  url = {http://www.imedea.uib.es/pub_download.php?id=1189}

}

Sorel, M; Giuliani, G; Scire, A; Miglierina, M; Laybourn, P & Donati, S Operating Regimes of GaAs-AlGaAs Semiconductor Ring Lasers: Experiment and Model 2003 IEEE Journal of Quantum Electronics
Vol. 39, pp. 1187-1195 
article URL 
Abstract: Operating Regimes of GaAs-AlGaAs Semiconductor Ring Lasers: Experiment and Model
BibTeX:

@article{IMEDEA_intranet:547,

  author = {Sorel,M and Giuliani,G and Scire,A and Miglierina,M and Laybourn,P and Donati,S},

  title = {Operating Regimes of GaAs-AlGaAs Semiconductor Ring Lasers: Experiment and Model},

  journal = {IEEE Journal of Quantum Electronics},

  year = {2003},

  volume = {39},

  pages = {1187--1195},

  url = {http://www.imedea.uib.es/pub_download.php?id=547}

}

A. Scire, J. Mulet, C.R.Mirasso J. Danckaert & Miguel, M. San Vectorial chaos synchronization and polarization message encoding in VCSELs 2003 Physical Review Letters
Vol. 90, pp. 113901 (1-4) 
article URL 
BibTeX:

@article{IMEDEA_intranet:552,

  author = {A. Scire, J. Mulet, C.R.Mirasso, J. Danckaert and M. San Miguel},

  title = {Vectorial chaos synchronization and polarization message encoding in VCSELs},

  journal = {Physical Review Letters},

  year = {2003},

  volume = {90},

  pages = {113901 (1--4)},

  url = {http://www.imedea.uib.es/pub_download.php?id=552}

}

Eguíluz, Víctor M.; Hernández-García, Emilio; Piro, Oreste & Klemm, Konstantin Effective dimensions and percolation in hierarchicaly structured scale-free networks 2003 Physical Review E - Statistical, Nonlinear, and Soft Matter Physics
Vol. 68, pp. 055102 (1-4) 
article URL 
Abstract: We introduce appropriate definitions of dimensions in order to characterize the fractal properties of complex networks. We compute these dimensions in a hierarchically structured network of particular interest. In spite of the nontrivial character of this network that displays scale-free connectivity among other features, it turns out to be approximately one-dimensional. The dimensional characterization is in agreement with the results on statistics of site percolation and other dynamical processes implemented on such a network.
BibTeX:

@article{IMEDEA_intranet:593,

  author = {Eguíluz, Víctor M. and Hernández-García, Emilio and Piro, Oreste and Klemm, Konstantin},

  title = {Effective dimensions and percolation in hierarchicaly structured scale-free networks},

  journal = {Physical Review E - Statistical, Nonlinear, and Soft Matter Physics},

  year = {2003},

  volume = {68},

  pages = {055102 (1--4)},

  url = {http://www.imedea.uib.es/pub_download.php?id=593}

}

Barland, S.; Marino, F.; Giudici, M.; Tredicce, J. & S., Balle In situ measurements of the cavity length variation across the transverse section of broad area VCSELs 2003 Applied Physics Letters
Vol. 83, pp. 2303-2305 
article URL 
Abstract:

We present a method to measure the cavity length variations of a broad-area vertical-cavity
surface-emitting laser. The method is based on the observation of an inhomogeneous nonlinear
response of the system under coherent optical injection. Due to the presence of a cavity resonance
frequency gradient in the system, the boundary of a modulational instability manifests itself as a
separation of the device in two distinct spatial regions. The observation of the position of this
boundary depending on parameters reveals the degree of homogeneity of the sample and allows a
direct measurement of the spatial variations of the cavity resonance frequency.

BibTeX:

@article{IMEDEA_intranet:596,

  author = {Barland, S. and Marino, F. and Giudici, M. and Tredicce, J. and Balle S.},

  title = {In situ measurements of the cavity length variation across the transverse section of broad area VCSELs},

  journal = {Applied Physics Letters},

  year = {2003},

  volume = {83},

  pages = {2303--2305},

  url = {http://www.imedea.uib.es/pub_download.php?id=596}

}

Scirè, A.; Colet, P. & San Miguel, M. Phase and polarization synchronization in vectorial oscillators 2003 invalid journal  article URL 
BibTeX:

@article{IMEDEA_intranet:597,

  author = {Scirè, A. and Colet, P. and San Miguel, M.},

  title = {Phase and polarization synchronization in vectorial oscillators},

  journal = {invalid journal},

  year = {2003},

  url = {http://www.imedea.uib.es/pub_download.php?id=597}

}

Barland, Stéphane; Giudici, Massimo; Tredicce, Jorge R. & Balle, Salvador Procesado óptico de información. Solitones de cavidad 2003 Investigación y Ciencia
Vol. 322 (Julio 2003, pp. 38-40 
article URL 
Abstract:

Cavity solitons are localized intensity peaks that can form in a
homogeneous background of radiation. They are generated by
shining laser pulses into optical cavities that contain a nonlinear
medium driven by a coherent field (holding beam). The ability to
switch cavity solitons on and off and to control their location
and motion by applying laser pulses makes them interesting as
potential ‘pixels’ for reconfigurable arrays or all-optical processing
units. Theoretical work on cavity solitons has stimulated a
variety of experiments in macroscopic cavities and in systems with optical feedback. But for practical devices, it is desirable
to generate cavity solitons in semiconductor structures, which
would allow fast response and miniaturization. The existence of
cavity solitons in semiconductor microcavities has been predicted
theoretically, and precursors of cavity solitons have
been observed, but clear experimental realization has been
hindered by boundary-dependence of the resulting optical patterns —cavity solitons should be self-confined. Here we
demonstrate the generation of cavity solitons in vertical cavity
semiconductor microresonators that are electrically pumped
above transparency but slightly below lasing threshold. We
show that the generated optical spots can be written, erased
and manipulated as objects independent of each other and of the
boundary. Numerical simulations allow for a clearer interpretation
of experimental results.

BibTeX:

@article{IMEDEA_intranet:602,

  author = {Stéphane Barland and Massimo Giudici and Jorge R. Tredicce and Salvador Balle},

  title = {Procesado óptico de información. Solitones de cavidad},

  journal = {Investigación y Ciencia},

  year = {2003},

  volume = {322 (Julio 2003},

  pages = {38--40},

  url = {http://www.imedea.uib.es/pub_download.php?id=602}

}

Sondermann, M.; Weinkath, M.; Ackemann, T.; Mulet, J. & Balle, S. Two-frequency emission and polarization dynamics at lasing threshold in vertical-cavity surface-emitting lasers 2003 Physical Review A - Atomic, Molecular, and Optical Physics
Vol. 68, pp. 033822 
article URL 
Abstract:

We investigate experimentally and theoretically the polarization dynamics in vertical-cavity surface-emitting lasers in the vicinity of the lasing threshold. If the net gain anisotropy between the two orthogonally polarized modes is close to zero, the laser operates in a partially polarized state. This state occurs at and slightly above the lasing threshold. It is characterized by anticorrelated dynamics of the two modes which result from completely anticorrelated dynamics at low frequencies and correlated dynamics on the time scale of the relaxation oscillations. If the net anisotropy is changed by a change of the detuning between the cavity resonance and the gain maximum, one of the two linear polarization states is selected depending on the sign of the net gain. For one sign the well-known phenomenon of polarization switching is recovered at higher currents. The experimental results show very good agreement with simulations based on a model that takes into account nonlinear spin dynamics and linear temperature-dependent detuning effects.

BibTeX:

@article{IMEDEA_intranet:603,

  author = {M. Sondermann and M. Weinkath and T. Ackemann and J. Mulet and S. Balle},

  title = {Two-frequency emission and polarization dynamics at lasing threshold in vertical-cavity surface-emitting lasers},

  journal = {Physical Review A - Atomic, Molecular, and Optical Physics},

  year = {2003},

  volume = {68},

  pages = {033822},

  url = {http://www.imedea.uib.es/pub_download.php?id=603}

}

Cara, M.; Balle, S. & Occhi, L. Modeling and measurement of the wavelength dependent output properties of quantum-well optical amplifiers 2003 IEEE Journal of Selected Topics in Quantum Electronics
Vol. 9, pp. 783-787 
article URL 
Abstract:

We present a model for quantum-well (QW) semiconductor
optical amplifiers (SOAs) that considers bidirectional field
propagation and the carrier densities in the barrier and QW regions.
Carrier capture from the barriers into the QWs and carrier
escape from the QWs to the barriers are included by means
of effective capture and escape times. The model incorporates the
wavelength dependence of the optical response of the active region
and the effects of spectral hole burning via an analytical approximation
to the susceptibility of the active material, which allows
one to very effectively include the wavelength dependence of the
output properties of the SOA. The model is used to analyze the
experimental results obtained for a multiquantum-well SOA. The
simulations results show a good agreement with the experimental
data when a carrier-density dependent escape time from the QW
to the barrier regions is considered.

BibTeX:

@article{IMEDEA_intranet:604,

  author = {M. Cara and S. Balle and L. Occhi},

  title = {Modeling and measurement of the wavelength dependent output properties of quantum-well optical amplifiers},

  journal = {IEEE Journal of Selected Topics in Quantum Electronics},

  year = {2003},

  volume = {9},

  pages = {783--787},

  url = {http://www.imedea.uib.es/pub_download.php?id=604}

}

Javaloyes, J.; Lippi, G. L. & Politi, A. Reduced model for the description of radiation-matter interaction including atomic recoil 2003 Phys. Rev. A
Vol. 68, pp. 033405 
article DOI URL 
BibTeX:

@article{PhysRevA.68.033405,

  author = {Javaloyes, J. and Lippi, G. L. and Politi, A.},

  title = {Reduced model for the description of radiation-matter interaction including atomic recoil},

  journal = {Phys. Rev. A},

  publisher = {American Physical Society},

  year = {2003},

  volume = {68},

  pages = {033405},

  url = {http://link.aps.org/doi/10.1103/PhysRevA.68.033405},

  doi = {http://dx.doi.org/10.1103/PhysRevA.68.033405}

}

Javaloyes, J.; Mandel, Paul & Pieroux, D. Dynamical properties of lasers coupled face to face 2003 Phys. Rev. E
Vol. 67, pp. 036201 
article DOI URL 
BibTeX:

@article{PhysRevE.67.036201,

  author = {Javaloyes, J. and Mandel, Paul and Pieroux, D.},

  title = {Dynamical properties of lasers coupled face to face},

  journal = {Phys. Rev. E},

  publisher = {American Physical Society},

  year = {2003},

  volume = {67},

  pages = {036201},

  url = {http://link.aps.org/doi/10.1103/PhysRevE.67.036201},

  doi = {http://dx.doi.org/10.1103/PhysRevE.67.036201}

}

Balle, S. Analytical description of spectral hole-burning effects in active semiconductors 2002 Optics Letters
Vol. 27(21), pp. 1923-1925 
article DOI URL 
Abstract:

An analytical approximation of the effects of spectral hole burning on the optical properties of active semiconductor materials was developed. Four-wave mixing effects and nonlinear gain compression were also discussed. It was found that the approximation presented provided a numerically efficient way of describing gain saturation and four-wave mixing in the optical response of a medium.

BibTeX:

@article{IMEDEA_intranet:10591,

  author = {Balle, S.},

  title = {Analytical description of spectral hole-burning effects in active semiconductors},

  journal = {Optics Letters},

  year = {2002},

  volume = {27},

  number = {21},

  pages = {1923--1925},

  url = {http://www.imedea.uib.es/pub_download.php?id=10591},

  doi = {http://dx.doi.org/10.1364/OL.27.001923}

}

Cartwright, Julyan H. E.; González, Diego L.; Piro, Oreste & Stanzial, Domenico. Aesthetics, dynamics, and muscial scales: A golden connection. 2002 Journal of New Music Research
Vol. 31, pp. 51-58 
article URL 
Abstract:

Pick a preprint HERE.

BibTeX:

@article{IMEDEA_intranet:414,

  author = {Cartwright, Julyan H. E. and González, Diego L. and Piro, Oreste and Stanzial, Domenico.},

  title = {Aesthetics, dynamics, and muscial scales: A golden connection.},

  journal = {Journal of New Music Research},

  year = {2002},

  volume = {31},

  pages = {51--58},

  url = {http://www.imedea.uib.es/pub_download.php?id=414}

}

Chialvo, Dante R.; Calvo, Oscar; Gonzalez, Diego L.; Piro, Oreste & Savino, Guillermo V. Subharmonic stochastic synchronization and resonance in neuronal systems. 2002 invalid journal
Vol. 65, pp. 050902(R)(1-4) 
article URL 
Abstract:

Pick a preprint HERE.

BibTeX:

@article{IMEDEA_intranet:424,

  author = {Chialvo, Dante R. and Calvo, Oscar and Gonzalez, Diego L. and Piro, Oreste and Savino, Guillermo V.},

  title = {Subharmonic stochastic synchronization and resonance in neuronal systems.},

  journal = {invalid journal},

  year = {2002},

  volume = {65},

  pages = {050902(R)(1--4)},

  url = {http://www.imedea.uib.es/pub_download.php?id=424}

}

Alessandro Scire, Josep Mulet, Claudio R. Mirasso & Miguel, Maxi San Intensity and Polarization Self-Pulsations in VCSELs 2002 Optics Letters
Vol. 27, pp. 391-393 
article URL 
Abstract: We implement a dynamical model that describes the polarization behavior in VCSELs containing an absorbing region surrounding the active zone. We find four regions of qualitative different behaviors: stable linearly-polarized operation, intensity pulsations of a linearly-polarized component, pulsations of both total intensity and polarization components, and polarization self-pulsations with constant total intensity. We characterize the four regions by computing the polarization resolved optical and power spectra. The predicted scenario agrees with recent experimental results.
BibTeX:

@article{IMEDEA_intranet:430,

  author = {Alessandro Scire, Josep Mulet, Claudio R. Mirasso and Maxi San Miguel},

  title = {Intensity and Polarization Self-Pulsations in VCSELs},

  journal = {Optics Letters},

  year = {2002},

  volume = {27},

  pages = {391--393},

  url = {http://www.imedea.uib.es/pub_download.php?id=430}

}

Mulet, Josep & Balle, Salvador Spatio-Temporal Modeling of the Optical Properties of VCSELs in Presence of Polarization Effects 2002 IEEE Journal of Quantum Electronics
Vol. 38, pp. 291-305 
article URL 
Abstract:

In this paper, we develop an optical dynamical model for vertical-cavity surface-emitting lasers (VCSELs) which describes, in an unified way, polarization and spatial effects. The model is based on equations for the lateral dependence of the slowly-varying amplitudes of the optical field in both circular polarizations, and equations for the carrier density in both spin orientations. This provides a natural generalization of the Spin Flip Model for the description of polarization properties of VCSELs extensively used in the literature. In its present form, the model assumes given functional dependence of the guiding mechanisms (built-in refractive index and thermal lensing) as well as the spatial dependence of the current density. We investigate the transverse mode behavior of gain-guided, bottom and top-emitter VCSELs by implementing the model with an analytical approximation to the susceptibility of quantum-well semiconductors. We demonstrate that the stronger the thermal lens, the stronger the tendency towards multimode operation, which indicates that high lateral uniformity of the temperature is required in order to maintain single mode operation in gain-guided VCSELs. We perform analytical calculations of the threshold curves in both types of VCSELs. Also, close-to-threshold numerical simulations show that, depending on the current shape, thermal lensing strength and relative detuning, different transverse modes can be selected.

BibTeX:

@article{IMEDEA_intranet:431,

  author = {Mulet, Josep and Balle, Salvador},

  title = {Spatio-Temporal Modeling of the Optical Properties of VCSELs in Presence of Polarization Effects},

  journal = {IEEE Journal of Quantum Electronics},

  year = {2002},

  volume = {38},

  pages = {291--305},

  url = {http://www.imedea.uib.es/pub_download.php?id=431}

}

Cartwright, Julyan H. E.; Magnasco, Marcelo & Piro, Oreste Noise and Inertia-Induced Inhomogeneity in the Distribution of Small Particles in Fluid Flows 2002 Chaos
Vol. 12, pp. 489-495 
article URL 
Abstract: The dynamics of small spherical neutrally buoyant particulate impurities immersed in a two-dimensional fluid flow are known to lead to particle accumulation in the regions of the flow in which rotation dominates over shear, provided that the Stokes number of the particles is sufficiently small. If the flow is viewed as a Hamiltonian dynamical system, it can be seen that the accumulations occur in the nonchaotic parts of the phase space: the Kolmogorov--Arnold--Moser tori. This has suggested a generalization of these dynamics to Hamiltonian maps, dubbed a bailout embedding. In this paper we use a bailout embedding of the standard map to mimic the dynamics of impurities subject not only to drag but also to fluctuating forces modelled as white noise. We find that the generation of inhomogeneities associated with the separation of particle from fluid trajectories is enhanced by the presence of noise, so that they appear in much broader ranges of the Stokes number than those allowing spontaneous separation.
BibTeX:

@article{IMEDEA_intranet:443,

  author = {Cartwright, Julyan H. E. and Magnasco, Marcelo and Piro, Oreste},

  title = {Noise and Inertia-Induced Inhomogeneity in the Distribution of Small Particles in Fluid Flows},

  journal = {Chaos},

  year = {2002},

  volume = {12},

  pages = {489--495},

  url = {http://www.imedea.uib.es/pub_download.php?id=443}

}

Cartwright, Julyan H. E.; Magnasco, Marcelo & Piro, Oreste Bailout Embeddings, Targeting of KAM Orbits,and the Control of Hamiltonian Chaos 2002 invalid journal
Vol. 65, pp. 045203(R)-045207(R) 
article URL 
Abstract: We present a novel technique, which we term bailout embedding, that can be used to target orbits having particular properties out of all orbits in a flow or map. We explicitly construct a bailout embedding for Hamiltonian systems so as to target KAM orbits. We show how the bailout dynamics is able to lock onto extremely small KAM islands in an ergodic sea.
BibTeX:

@article{IMEDEA_intranet:444,

  author = {Cartwright, Julyan H. E. and Magnasco, Marcelo and Piro, Oreste},

  title = {Bailout Embeddings, Targeting of KAM Orbits,and the Control of Hamiltonian Chaos},

  journal = {invalid journal},

  year = {2002},

  volume = {65},

  pages = {045203(R)--045207(R)},

  url = {http://www.imedea.uib.es/pub_download.php?id=444}

}

Valle, Angel; Mulet, Josep; Pesquera, Luis & Balle, Salvador Diffusive turn-off transients in current modulated multitransverse mode VCSELs 2002 Proceedings of the SPIE(4649), pp. 50-62  inproceedings URL 
Abstract:

Secondary pulsations are an example of diffusive turn-off transients that can limit the performance of VCSELs in optical communication systems. Secondary pulsations are firstly analysed by using a model where a modal expansion of the electric field is performed. The maximum power of the secondary pulsations and the time at which they appear fluctuate when the spontaneous emission noise is present. A linear relation between the two previous quantities for each individual turn-off event is found. In the single-mode regime, the averaged maximum power during turn-off transients increases when increasing the injection current. However, in the multi-mode regime, the strength of secondary pulsations decreases when increasing the current. Secondary pulsations are also analysed by using a spatio-temporal description of the VCSEL dynamics, where the modal profiles are determined from the distribution of injected carriers and the thermal lens. This model also incorporates polarization effects and a frequency-dependent susceptibility. In this model, the carrier-induced refractive index changes increase the strength of secondary pulsations as compared to that obtained with the modal expansion. It is also shown that the use of ring-shaped electrical contact enhances the strength of secondary pulsations, while it decreases when multi-transverse mode operation is present.

BibTeX:

@inproceedings{IMEDEA_intranet:482,

  author = {Valle, Angel and Mulet, Josep and Pesquera, Luis and Balle, Salvador},

  title = {Diffusive turn-off transients in current modulated multitransverse mode VCSELs},

  journal = {Proceedings of the SPIE},

  year = {2002},

  number = {4649},

  pages = {50--62},

  url = {http://www.imedea.uib.es/pub_download.php?id=482}

}

Scirè, Alessandro; Mulet, Josep; Mirasso, Claudio & San Miguel, Maxi Intensity and Polarization Self-Pulsations in VCSELs 2002 invalid journal  article URL 
BibTeX:

@article{IMEDEA_intranet:487,

  author = {Scirè, Alessandro and Mulet, Josep and Mirasso, Claudio and San Miguel, Maxi},

  title = {Intensity and Polarization Self-Pulsations in VCSELs},

  journal = {invalid journal},

  year = {2002},

  url = {http://www.imedea.uib.es/pub_download.php?id=487}

}

Scirè, Alessandro; Mulet, Josep; Mirasso, Claudio R.; Danckaert, Jan & San Miguel, Maxi Vectorial Chaos Synchronization and Polarization Encoding in Self-Pulsating VCSELs 2002 invalid journal  article URL 
BibTeX:

@article{IMEDEA_intranet:488,

  author = {Scirè, Alessandro and Mulet, Josep and Mirasso, Claudio R. and Danckaert, Jan and San Miguel, Maxi},

  title = {Vectorial Chaos Synchronization and Polarization Encoding in Self-Pulsating VCSELs},

  journal = {invalid journal},

  year = {2002},

  url = {http://www.imedea.uib.es/pub_download.php?id=488}

}

F., Marino; M., Giudici; S., Barland & S., Balle Experimental Evidence of Stochastic Resonance in an Excitable Optical System 2002 Physical Review Letters
Vol. 88, pp. 040601 
article URL 
Abstract:

Experimental evidence of stochastic resonance in an excitable optical system is reported. We apply
a sinusoidal forcing to the system and, for a finite external noise level, we find a frequency for which
the excitable pulsing occurs periodically at the frequency imposed by the modulation. This resonant
frequency matches the inverse of the average escape time of the stochastically driven system (i.e., without
forcing). The same resonance is found by varying the noise level for fixed forcing frequencies. We
discuss different indicators in order to describe quantitatively the degree of resonance.

BibTeX:

@article{IMEDEA_intranet:516,

  author = {Marino F. and Giudici M. and Barland S. and Balle S.},

  title = {Experimental Evidence of Stochastic Resonance in an Excitable Optical System},

  journal = {Physical Review Letters},

  year = {2002},

  volume = {88},

  pages = {040601},

  url = {http://www.imedea.uib.es/pub_download.php?id=516}

}

Mulet, Josep & Balle, Salvador Transverse mode dynamics in VCSELs: Spatiotemporal versus modal expansion descriptions 2002 Physical Review A - Atomic, Molecular, and Optical Physics
Vol. 66, pp. 053802 
article URL 
Abstract:

We discuss the range of validity of a modal description for the spatiotemporal dynamics of the optical field in vertical-cavity surface-emitting lasers (VCSELs). We focus on the secondary pulsations that appear during the turn-off transients when the injection current is modulated by a square-wave signal. We compare the results obtained with both a full spatiotemporal model and a modal expansion derived from this model. We find that the results obtained from the two descriptions agree for strong lateral guiding. However, for weak lateral guiding we find differences because the optical field profile changes significantly due to spatial changes in refractive index induced by the carrier density. The reason is that in the full spatiotemporal model a shrinkage of the mode profile occurs which leads to an enhancement of the secondary pulsations. This effect is not included in the modal expansion, and it determines the limits of validity of such an approach for gain-guided devices.

BibTeX:

@article{IMEDEA_intranet:528,

  author = {Mulet, Josep and Balle, Salvador},

  title = {Transverse mode dynamics in VCSELs: Spatiotemporal versus modal expansion descriptions},

  journal = {Physical Review A - Atomic, Molecular, and Optical Physics},

  year = {2002},

  volume = {66},

  pages = {053802},

  url = {http://www.imedea.uib.es/pub_download.php?id=528}

}

Sorel, M; Scire, A; Giuliani, G; Miglierina, R; Balle, S; Laybourn, P & Donati, S Alternate Oscillations in Semiconductor Ring Lasers 2002 Optics Letters
Vol. 27, pp. 1992-1994 
article URL 
Abstract:

We report on fabrication and characterization of single-longitudinal- and transverse-mode semiconductor ring
lasers. A bifurcation from bidirectional stable operation to a regime with alternate oscillations of the counterpropagating
modes was observed experimentally and is theoretically explained through a two-mode model.
Analytical expressions for the onset and the frequency of the oscillations are derived, and L I curves numerically
evaluated. Good quantitative agreement between theory and measurements made over a large number
of tested devices is obtained.

BibTeX:

@article{IMEDEA_intranet:545,

  author = {Sorel, M and Scire, A and Giuliani, G and Miglierina, R and Balle, S and Laybourn, P and Donati, S},

  title = {Alternate Oscillations in Semiconductor Ring Lasers},

  journal = {Optics Letters},

  year = {2002},

  volume = {27},

  pages = {1992--1994},

  url = {http://www.imedea.uib.es/pub_download.php?id=545}

}

V. Annovazzi-Lodi, S.Merlo, M. Norgia & Scire, A. Characterization of Chaotic Telecommunication Lasers for Different Fiber Cavity Lengths 2002 IEEE Journal of Quantum Electronics
Vol. 38, pp. 1171-1177 
article URL 
BibTeX:

@article{IMEDEA_intranet:546,

  author = {V. Annovazzi-Lodi, S.Merlo, M. Norgia and A. Scire},

  title = {Characterization of Chaotic Telecommunication Lasers for Different Fiber Cavity Lengths},

  journal = {IEEE Journal of Quantum Electronics},

  year = {2002},

  volume = {38},

  pages = {1171--1177},

  url = {http://www.imedea.uib.es/pub_download.php?id=546}

}

Neufeld, Zoltan; Lopez, Cristobal; Hernandez-Garcia, Emilio & Piro, Oreste Excitable media in open and closed chaotic flows 2002 Physical Review E - Statistical, Nonlinear, and Soft Matter Physics
Vol. 66, pp. 066208(1-12) 
article URL 
Abstract: We investigate the response of an excitable medium to a localized perturbation in the presence of a two-dimensional smooth chaotic flow. Two distinct types of flows are numerically considered: open and closed. For both of them three distinct regimes are found, depending on the relative strengths of the stirring and the rate of the excitable reaction. In order to clarify and understand the role of the many competing mechanisms present, simplified models of the process are introduced. They are one-dimensional baker-map models for the flow and a one-dimensional approximation for the transverse profile of the filaments.

Also available as arXiv preprint nlin.CD/02090024.

BibTeX:

@article{IMEDEA_intranet:571,

  author = {Neufeld, Zoltan and Lopez, Cristobal and Hernandez-Garcia, Emilio and Piro, Oreste},

  title = {Excitable media in open and closed chaotic flows},

  journal = {Physical Review E - Statistical, Nonlinear, and Soft Matter Physics},

  year = {2002},

  volume = {66},

  pages = {066208(1--12)},

  url = {http://www.imedea.uib.es/pub_download.php?id=571}

}

Yacomotti, A.M.; Mindlin, G.B.; Giudici, M.; Balle, S.; Barland, S. & Tredicce, J. Coupled optical excitable cells 2002 Physical Review E - Statistical, Nonlinear, and Soft Matter Physics
Vol. 66, pp. 036227 
article URL 
Abstract:

In this work we investigate experimentally the dynamics of two coupled optical excitable cells, namely, two semiconductor lasers with optical feedback. We analyze the dynamics observed in terms of the statistical properties of the time series and in terms of the phase space reconstruction from the data. We build a model based on a simple set of deterministic equations (on a two torus) plus noise in order to capture the essential features of the dynamics observed. We discuss the validity of our theoretical results in terms of families of excitable systems and coupling terms

BibTeX:

@article{IMEDEA_intranet:575,

  author = {Yacomotti, A.M. and Mindlin, G.B. and Giudici, M. and Balle, S. and Barland, S. and Tredicce, J.},

  title = {Coupled optical excitable cells},

  journal = {Physical Review E - Statistical, Nonlinear, and Soft Matter Physics},

  year = {2002},

  volume = {66},

  pages = {036227},

  url = {http://www.imedea.uib.es/pub_download.php?id=575}

}

Julyan H. E. Cartwright, Oreste Piro, Ana I. Villacampa Pattern formation in solutal convection: vermiculated rolls and isolated cells. 2002 Physica A
Vol. 314, pp. 291-298 
article URL 
BibTeX:

@article{IMEDEA_intranet:584,

  author = {Julyan H. E. Cartwright, Oreste Piro, Ana I. Villacampa},

  title = {Pattern formation in solutal convection: vermiculated rolls and isolated cells.},

  journal = {Physica A},

  year = {2002},

  volume = {314},

  pages = {291--298},

  url = {http://www.imedea.uib.es/pub_download.php?id=584}

}

Barland, S.; Tredicce, J.R.; Brambilla, M.; Lugiato, L.A.; Balle, S.; Giudici, M.; Maggipinto, T.; Spinelli, L.; Tissoni, G.; Knoedl, T. & Miller, M. Cavity solitons as pixels in semiconductor microresonators 2002 Nature
Vol. 419, pp. 699-702 
article URL 
Abstract:

Cavity solitons are localized intensity peaks that can form in a
homogeneous background of radiation. They are generated by
shining laser pulses into optical cavities that contain a nonlinear
medium driven by a coherent field (holding beam). The ability to
switch cavity solitons on and off and to control their location
and motion by applying laser pulses makes them interesting as
potential ‘pixels’ for reconfigurable arrays or all-optical processing
units. Theoretical work on cavity solitons has stimulated a
variety of experiments in macroscopic cavities and in systems
with optical feedback. But for practical devices, it is desirable
to generate cavity solitons in semiconductor structures, which
would allow fast response and miniaturization. The existence of
cavity solitons in semiconductor microcavities has been predicted
theoretically, and precursors of cavity solitons have
been observed, but clear experimental realization has been
hindered by boundary-dependence of the resulting optical patterns —cavity solitons should be self-confined. Here we
demonstrate the generation of cavity solitons in vertical cavity
semiconductor microresonators that are electrically pumped
above transparency but slightly below lasing threshold. We
show that the generated optical spots can be written, erased
and manipulated as objects independent of each other and of the
boundary. Numerical simulations allow for a clearer interpretation
of experimental results.

BibTeX:

@article{IMEDEA_intranet:600,

  author = {S. Barland and J.R. Tredicce and M. Brambilla and L.A. Lugiato and S. Balle and M. Giudici and T. Maggipinto and L. Spinelli and G. Tissoni and T. Knoedl and M. Miller},

  title = {Cavity solitons as pixels in semiconductor microresonators},

  journal = {Nature},

  year = {2002},

  volume = {419},

  pages = {699--702},

  url = {http://www.imedea.uib.es/pub_download.php?id=600}

}

Lopez, Cristobal; Hernandez-Garcia, Emilio; Piro, Oreste; Vulpiani, Angelo & Zambianchi, Enrico Population dynamics advected by chaotic flows: a discrete-time map approach. 2001 Chaos
Vol. 11, pp. 397-403 
article URL 
Abstract: A discrete-time model of reacting evolving
fields, transported by a bidimensional chaotic fluid flow, is
studied. Our approach is based on the use of a Lagrangian scheme
where it fluid particles are advected by a 2d symplectic map
possibly yielding Lagrangian chaos. Each it fluid particle
carries concentrations of active substances which evolve according
to its own reaction dynamics. This evolution is also
modeled in terms of maps. Motivated by the question, of relevance
in marine ecology, of how a localized distribution of nutrients or
preys affects the spatial structure of predators transported by a
fluid flow, we study a specific model in
which the population dynamics is given by a logistic map with
space-dependent coefficient, and advection is given by the
standard map. Fractal and random patterns in the Eulerian spatial
concentration of predators are obtained under different
conditions. Exploiting the analogies of this coupled-map
(advection plus reaction) system with a random map, some features
of these patterns are discussed.

This directory contains the paper files.
BibTeX:

@article{IMEDEA_intranet:388,

  author = {Lopez, Cristobal and Hernandez-Garcia, Emilio and Piro, Oreste and Vulpiani, Angelo and Zambianchi, Enrico},

  title = {Population dynamics advected by chaotic flows: a discrete-time map approach.},

  journal = {Chaos},

  year = {2001},

  volume = {11},

  pages = {397--403},

  url = {http://www.imedea.uib.es/pub_download.php?id=388}

}

Sendi na-Nadal, Irene; Pérez-Mu nuzuri, Vicente; Eguíluz, Víctor M.; Hernández-García, Emilio & Oreste, Piro Quasiperiodic Patterns in Boundary-Modulated Excitable Waves 2001 Physical Review E - Statistical, Nonlinear, and Soft Matter Physics
Vol. 64, pp. 046208 (1-5) 
article URL 
Abstract: We investigate the impact of the domain shape on wave propagation in excitable media.
Channelled domains with sinusoidal boundaries are considered. Trains of fronts generated
periodically at an extreme of the channel are found to adopt a quasiperiodic spatial configuration
stroboscopically frozen in time. The phenomenon is studied in a model for the photo-sensitive
Belousov-Zabotinsky reaction, but we give a theoretical derivation of the spatial return maps
prescribing the height and position of the successive fronts that is valid for arbitrary excitable
reaction-diffusion systems.

The paper can be obtained LOCALLY
or from LANL preprint server as paper nlin.PS/0010047
BibTeX:

@article{IMEDEA_intranet:396,

  author = {Sendiña-Nadal, Irene and Pérez-Muñuzuri, Vicente and Eguíluz, Víctor M. and Hernández-García, Emilio and Oreste, Piro},

  title = {Quasiperiodic Patterns in Boundary-Modulated Excitable Waves},

  journal = {Physical Review E - Statistical, Nonlinear, and Soft Matter Physics},

  year = {2001},

  volume = {64},

  pages = {046208 (1--5)},

  url = {http://www.imedea.uib.es/pub_download.php?id=396}

}

Toral, Raúl; Mirasso, Claudio; Hernández-García, Emilio & Piro, Oreste Analytical and Numerical Studies of Noise-induced Synchronization of Chaotic Systems 2001 Chaos
Vol. 11, pp. 665-673 
article URL 
Abstract: We study the effect that the injection of a common source of noise
has on the trajectories of chaotic systems, addressing some
contradictory results present in the literature. We present
particular examples of 1-d maps and the Lorenz system, both in the
chaotic region, and give numerical evidence showing that the
addition of a common noise to different trajectories, which start
from different initial conditions, leads eventually to their
perfect synchronization. When synchronization occurs, the largest
Lyapunov exponent becomes negative. For a simple map we are able
to show this phenomenon analytically. Finally, we analyze the
structural stability of the phenomenon.

The files of the paper are here.

BibTeX:

@article{IMEDEA_intranet:399,

  author = {Toral, Raúl and Mirasso, Claudio and Hernández-García, Emilio and Piro, Oreste},

  title = {Analytical and Numerical Studies of Noise-induced Synchronization of Chaotic Systems},

  journal = {Chaos},

  year = {2001},

  volume = {11},

  pages = {665--673},

  url = {http://www.imedea.uib.es/pub_download.php?id=399}

}

Mulet, J.; Mirasso, C.R.; Balle, S. & San Miguel, M. Transverse and Polarization Mode Selection in VCSELs 2001 Proceedings of the SPIE
Vol. 4283(4283), pp. 139-149 
inproceedings URL 
Abstract:

We develop a mesoscopic model of semiconductor dynamics for
vertical-cavity surface-emitting lasers which allows us to
describe polarization and transverse mode dynamics simultaneously.
Within this model, we study the selection processes and the turn-on delay for the
switch-on of different transverse modes in gain-guided VCSELs. We consider
different active-region diameters, excitation conditions and current shapes.
Following the application of the current pulse, transverse modes become excited in
a quite definite sequence. After the turn-on, the VCSEL initially switches-on in
the fundamental transverse mode, but higher-order transverse modes
become excited later. In general, the results obtained are in
qualitative agreement with experiments reported recently. Finally, we discuss
the current shape dependence on the transverse mode selection at threshold.

BibTeX:

@inproceedings{IMEDEA_intranet:402,

  author = {Mulet, J. and Mirasso, C.R. and Balle, S. and San Miguel, M.},

  title = {Transverse and Polarization Mode Selection in VCSELs},

  journal = {Proceedings of the SPIE},

  year = {2001},

  volume = {4283},

  number = {4283},

  pages = {139--149},

  url = {http://www.imedea.uib.es/pub_download.php?id=402}

}

Eguiluz, Victor M.; Hernandez-Garcia, Emilio & Piro, Oreste Complex Ginzburg-Landau Equation in the Presence of Walls and Corners 2001 Physical Review E - Statistical, Nonlinear, and Soft Matter Physics
Vol. 64, pp. 036205 (1-10) 
article URL 
Abstract: We investigate the influence of walls and corners (with Dirichlet
and Neumann boundary conditions) in the evolution of
twodimensional autooscillating fields described by the Complex
Ginzburg-Landau equation. Analytical solutions are found, and
arguments provided, to show that Dirichlet walls introduce strong
selection mechanisms for the wave pattern. Corners between walls
provide additional synchronization mechanisms and associated
selection criteria. The numerical results fit well with the
theoretical predictions in the parameter range studied.

The files can be found HERE, and there are related MOVIES

BibTeX:

@article{IMEDEA_intranet:409,

  author = {Eguiluz, Victor M. and Hernandez-Garcia, Emilio and Piro, Oreste},

  title = {Complex Ginzburg-Landau Equation in the Presence of Walls and Corners},

  journal = {Physical Review E - Statistical, Nonlinear, and Soft Matter Physics},

  year = {2001},

  volume = {64},

  pages = {036205 (1--10)},

  url = {http://www.imedea.uib.es/pub_download.php?id=409}

}

Cartwright, Julyan H. E.; González, Diego L. & Piro, Oreste Pitch perception: A dynamical perspective. 2001 Proceedings of the National Academy of Sciences of the United States of America
Vol. 98, pp. 4855-4859 
article URL 
Abstract:

Pick a preprint HERE.

BibTeX:

@article{IMEDEA_intranet:413,

  author = {Cartwright, Julyan H. E. and González, Diego L. and Piro, Oreste},

  title = {Pitch perception: A dynamical perspective.},

  journal = {Proceedings of the National Academy of Sciences of the United States of America},

  year = {2001},

  volume = {98},

  pages = {4855--4859},

  url = {http://www.imedea.uib.es/pub_download.php?id=413}

}

Duarte, C.M. y O. Piro. Interdisciplinary Challenges and Bottlenecks in the Aquatic Sciences. 2001 invalid journal
Vol. 10, pp. 57-61 
article URL 
BibTeX:

@article{IMEDEA_intranet:569,

  author = {Duarte, C.M. y O. Piro.},

  title = {Interdisciplinary Challenges and Bottlenecks in the Aquatic Sciences.},

  journal = {invalid journal},

  year = {2001},

  volume = {10},

  pages = {57--61},

  url = {http://www.imedea.uib.es/pub_download.php?id=569}

}

Perrin, Mathias; Ye, Zongxiong; Javaloyes, Julien; Lippi, Gian Luca; Politi, Antonio & Narducci, Lorenzo M. Collective light-matter interaction in the presence of atomic recoil 2001 Optics & Photonics News
Vol. 12(12), pp. 60-60 
article URL 
BibTeX:

@article{perrin:60,

  author = {Mathias Perrin and Zongxiong Ye and Julien Javaloyes and Gian Luca Lippi and Antonio Politi and Lorenzo M. Narducci},

  title = {Collective light-matter interaction in the presence of atomic recoil},

  journal = {Optics & Photonics News},

  publisher = {OSA},

  year = {2001},

  volume = {12},

  number = {12},

  pages = {60-60},

  url = {http://www.opticsinfobase.org/abstract.cfm?URI=OPN-12-12-60}

}

Ackemann, T.; Barland, S; Cara, M; Balle, S; Tredicce, J.; Jäger, R; Grabherr, M.; Miller, M & Ebeling, K. J. Spatial mode structure of bottom-emitting broad-area vertical-cavity surface-emitting lasers 2000 Journal of Optics B-Quantum and Semiclassical Optics
Vol. 2, pp. 406-412 
article URL 
Abstract:

The spatial mode structure of circular broad-area bottom-emitting vertical-cavity
surface-emitting lasers is investigated close to threshold. The devices display very high-order
flower-like Laguerre modes as well as structures with a Cartesian symmetry in spite of the
original O(2) symmetry. In some cases the latter resemble tilted waves more than
Hermite–Gaussian modes. Spatial structures appear for both sides of the detuning between
the gain peak and the cavity resonance. The results indicate the necessity to refine the
theoretical models to include realistic boundary conditions and inhomogeneities.

BibTeX:

@article{IMEDEA_intranet:10590,

  author = {Ackemann, T. and Barland, S and Cara, M and Balle, S and Tredicce, J. and Jäger, R and Grabherr, M. and Miller, M and Ebeling, K. J.},

  title = {Spatial mode structure of bottom-emitting broad-area vertical-cavity surface-emitting lasers},

  journal = {Journal of Optics B-Quantum and Semiclassical Optics},

  year = {2000},

  volume = {2},

  pages = {406--412},

  url = {http://www.imedea.uib.es/pub_download.php?id=10590}

}

Raul Toral, Claudio R. Mirasso, E. Hernandez-Garcia & Piro, Oreste Synchronization of Chaotic Systems by Common Random Forcing 2000 invalid journal, pp. 255-262  article URL 
Abstract: Paper.ps.gz
BibTeX:

@article{IMEDEA_intranet:315,

  author = {Raul Toral, Claudio R. Mirasso,E. Hernandez-Garcia and Oreste Piro},

  title = {Synchronization of Chaotic Systems by Common Random Forcing},

  journal = {invalid journal},

  year = {2000},

  pages = {255--262},

  url = {http://www.imedea.uib.es/pub_download.php?id=315}

}

M. G. Zimmermann, R. Toral, O. Piro M. San Miguel Stochastic Spatiotemporal Intermittency and Noise-Induced Transition to an Absorbing Phase 2000 Physical Review Letters
Vol. 85, pp. 3612-3615 
article URL 
Abstract: We introduce a stochastic partial differential equation capable
of reproducing the main features of spatiotemporal
intermittency (STI). Additionally the model displays a noise
induced transition from laminarity to the STI regime. We show by
numerical simulations and a mean-field analysis that for high
noise intensities the system globally evolves to a uniform
absorbing phase, while for noise intensities below a critical
value spatiotemporal intermittence dominates. A quantitative
computation of the loci of this transition in the relevant
parameter space is presented.

BibTeX:

@article{IMEDEA_intranet:340,

  author = {M. G. Zimmermann, R. Toral, O. Piro, M. San Miguel},

  title = {Stochastic Spatiotemporal Intermittency and Noise-Induced Transition to an Absorbing Phase},

  journal = {Physical Review Letters},

  year = {2000},

  volume = {85},

  pages = {3612--3615},

  url = {http://www.imedea.uib.es/pub_download.php?id=340}

}

Eguiluz, Victor M.; Hernandez-Garcia, Emilio & Piro, Oreste Boundary effects in extended dynamical systems 2000 Physica A
Vol. 283, pp. 48-51 
article URL 
Abstract: This is a contribution submitted to the proceedigs of LAWNP99
(Physica A).
HERE you will find the ABSTRACT, the three postscript files,
the TeX file, and the
full paper including figures.
BibTeX:

@article{IMEDEA_intranet:353,

  author = {Eguiluz, Victor M. and Hernandez-Garcia, Emilio and Piro, Oreste},

  title = {Boundary effects in extended dynamical systems},

  journal = {Physica A},

  year = {2000},

  volume = {283},

  pages = {48--51},

  url = {http://www.imedea.uib.es/pub_download.php?id=353}

}

San Miguel, M.; Balle, S.; Mulet, J.; Mirasso, C.R.; Tolkachova, E. & Tredicce, J.R. Combined effects of semiconductor gain dynamics, spin dynamics and thermal shift in polarization selection in VCSELs 2000 Proceedings of the SPIE
Vol. 3944(3944), pp. 242-251 
inproceedings DOI URL 
Abstract:

Combined effects of semiconductor gain dynamics, spin dynamics and thermal shift in polarization selection in VCSELs

BibTeX:

@inproceedings{IMEDEA_intranet:356,

  author = {San Miguel, M. and Balle, S. and Mulet, J. and Mirasso, C.R. and Tolkachova, E. and Tredicce, J.R.},

  title = {Combined effects of semiconductor gain dynamics, spin dynamics and thermal shift in polarization selection in VCSELs},

  journal = {Proceedings of the SPIE},

  year = {2000},

  volume = {3944},

  number = {3944},

  pages = {242--251},

  url = {http://www.imedea.uib.es/pub_download.php?id=356},

  doi = {http://link.aip.org/link/doi/10.1117/12.391426}

}

Giacomelli, G.; Giudici, M.; Balle, S. & Tredicce, J. R. Experimental evidence of coherence resonance in an optical system 2000 Physical Review Letters
Vol. 84, pp. 3298-3301 
article URL 
Abstract:

Experimental evidence of it Coherence Resonance in an optical system is reported.
We show that the regularity of the excitable pulses in the intensity of a laser
diode with optical feedback increases when adding noise, up to an optimal value of
the noise strength. Both phase and amplitude fluctuations of the pulses play a
relevant role in the dynamics of the system. We introduce the joint entropy of the
two variables to generalize the indicator of coherence, and we put in evidence the
mechanism of destruction of the excitable orbit after the resonance.

ps file, 580 kB

BibTeX:

@article{IMEDEA_intranet:364,

  author = {Giacomelli, G. and Giudici, M. and Balle, S. and Tredicce, J. R.},

  title = {Experimental evidence of coherence resonance in an optical system},

  journal = {Physical Review Letters},

  year = {2000},

  volume = {84},

  pages = {3298--3301},

  url = {http://www.imedea.uib.es/pub_download.php?id=364}

}

Calvo, O.; Cartwright, J.H.E.; González, D.L.; Piro, O. & Sportolari, F. Three-Frequency Resonances in Coupled phase-Locked Loops 2000 invalid journal
Vol. 47, pp. 491-497 
article URL 
Abstract:

Pick a preprint HERE.

BibTeX:

@article{IMEDEA_intranet:369,

  author = {Calvo, O. and Cartwright, J.H.E. and González, D.L. and Piro, O. and Sportolari, F.},

  title = {Three-Frequency Resonances in Coupled phase-Locked Loops},

  journal = {invalid journal},

  year = {2000},

  volume = {47},

  pages = {491--497},

  url = {http://www.imedea.uib.es/pub_download.php?id=369}

}

Babiano, Armando; Cartwright, Julyan H. E.; Piro, Oreste & Provenzale, Antonello Dynamics of a Small Neutrally Buoyant Sphere in a Fluid and Targeting in Hamiltonian Systems 2000 Physical Review Letters
Vol. 84, pp. 5764-5767 
article URL 
Abstract: We show that, even in the most favorable case, the motion of a small spherical tracer suspended in
a fluid of the same density may differ from the corresponding motion of an ideal passive particle. We
demonstrate furthermore how its dynamics may be applied to target trajectories in Hamiltonian systems.
BibTeX:

@article{IMEDEA_intranet:382,

  author = {Babiano, Armando and Cartwright, Julyan H. E. and Piro, Oreste and Provenzale, Antonello},

  title = {Dynamics of a Small Neutrally Buoyant Sphere in a Fluid and Targeting in Hamiltonian Systems},

  journal = {Physical Review Letters},

  year = {2000},

  volume = {84},

  pages = {5764--5767},

  url = {http://www.imedea.uib.es/pub_download.php?id=382}

}

Ackemann, T.; Barland, S.; Tredicce, J. R.; Cara, M.; Balle, S. & Jager, R. Spatial structure of broad-area vertical-cavity regenerative amplifiers 2000 Optics Letters
Vol. 25, pp. 814-816 
article URL 
Abstract:

We investigate the spatial structure of broad-area vertical-cavity regenerative amplif iers injected with a
homogeneous beam. The emerging patterns have a predominantly sixfold rotational symmetry, verifying
the recent prediction of formation of hexagons. The length scale is controllable by means of detuning and
follows the prediction for tilted waves.

BibTeX:

@article{IMEDEA_intranet:407,

  author = {Ackemann, T. and Barland, S. and Tredicce, J. R. and Cara, M. and Balle, S. and Jager, R. },

  title = {Spatial structure of broad-area vertical-cavity regenerative amplifiers},

  journal = {Optics Letters},

  year = {2000},

  volume = {25},

  pages = {814--816},

  url = {http://www.imedea.uib.es/pub_download.php?id=407}

}

Ackemann, T.; Barland, S.; Giudici, M.; Tredicce, J.; Balle, S.; Jaeger, R.; Grabherr, M.; Miller, M. & Ebeling, K.J. Patterns in Broad-Area Microcavities 2000 Physica Status Solidi (B): Basic Research
Vol. 221, pp. 133-136 
article URL 
Abstract:

The emergence of spatial structures with an approximate hexagonal symmetry is observed in broad-area amplifying microcavities with injection of a homogeneous beam. The length scale is controllable via detuning. Optical bistability occurs close to the longitudinal resonance.

BibTeX:

@article{IMEDEA_intranet:539,

  author = {Ackemann, T. and Barland, S. and Giudici, M. and Tredicce, J. and Balle, S. and Jaeger, R. and Grabherr, M. and Miller, M. and Ebeling, K.J.},

  title = {Patterns in Broad-Area Microcavities},

  journal = {Physica Status Solidi (B): Basic Research},

  year = {2000},

  volume = {221},

  pages = {133--136},

  url = {http://www.imedea.uib.es/pub_download.php?id=539}

}

Cartwright, J. H. E.; Feingold, M. & Piro, O. An Introduction to Chaotic Advection 1999 invalid journal, pp. 307-342  article URL 
BibTeX:

@article{IMEDEA_intranet:254,

  author = {Cartwright, J. H. E. and Feingold, M. and Piro, O.},

  title = {An Introduction to Chaotic Advection},

  journal = {invalid journal},

  year = {1999},

  pages = {307--342},

  url = {http://www.imedea.uib.es/pub_download.php?id=254}

}

Gahl, A; Balle, S & San Miguel, M Polarization Dynamics of Optically Pumped VCSELs 1999 IEEE Journal of Quantum Electronics
Vol. 35, pp. 342-351 
article URL 
Abstract:

We consider the polarization dynamics of optically pumped vertical--cavity
surface--emitting lasers (VCSELs) with a pump light of arbitrary polarization
ellipticity. We also consider the effect of an applied transverse
magnetic field on the polarization properties of the output light. We first
test our theoretical description by analyzing the polarization state of the
photoluminescence light emitted by an optically pumped quantum well, and
discuss a variety of phenomena known to be originated by spin carrier dynamics
in these materials.
We discuss how these phenomena are modified when a VCSEL is operated
above threshold and we show that our model gives a good description of Larmor
oscillations observed in VCSELs excited with short optical pulses.
For VCSELs under continuous optical pump we find a number of accessible
experimental situations in which self-sustained polarization oscillations in
the emitted light are possible. We identify and analyze three different
mechanisms for these oscillations to occur. When no
magnetic field is applied we find polarization oscillations governed by
birefringence, and undamped polarization oscillations at the relaxation
oscillation frequency. With an applied magnetic field
we find self-sustained oscillations governed by the Larmor frequency. In
addition our study of optically pumped VCSELs makes apparent the effects of
spin carrier dynamics in the polarization properties of the emitted light.
ps file, 670 kB

BibTeX:

@article{IMEDEA_intranet:296,

  author = {Gahl, A and Balle, S and San Miguel, M},

  title = {Polarization Dynamics of Optically Pumped VCSELs},

  journal = {IEEE Journal of Quantum Electronics},

  year = {1999},

  volume = {35},

  pages = {342--351},

  url = {http://www.imedea.uib.es/pub_download.php?id=296}

}

Eguiluz, Victor M.; Alstrom, Preben; Hernandez-Garcia, Emilio & Piro, Oreste Average Patterns of Spatiotemporal Chaos: a Boundary Effect 1999 invalid journal
Vol. 59, pp. 2822-2825 
article URL 
Abstract: We consider time-averaged patterns obtained from the Kuramoto-Sivashinsky equation in a bounded domain. The average patterns recover global symmetries broken locally by the chaotic fluctuations. Their amplitude is strongest at the boundaries and decays with increasing distance to them. The law of decay is found and explained. The wavenumber selected by the average pattern is studied as a function of system size and the different behavior between the central and boundary regions is discussed. Most of these observations agree with experimental results in different systems, thus indicating a degree of universality in the behavior of average patterns.

More info
BibTeX:

@article{IMEDEA_intranet:298,

  author = {Eguiluz, Victor M. and Alstrom, Preben and Hernandez-Garcia, Emilio and Piro, Oreste},

  title = {Average Patterns of Spatiotemporal Chaos: a Boundary Effect},

  journal = {invalid journal},

  year = {1999},

  volume = {59},

  pages = {2822--2825},

  url = {http://www.imedea.uib.es/pub_download.php?id=298}

}

Eguiluz, Victor M.; Hernandez-Garcia, Emilio & Piro, Oreste Boundary Effects in The Complex Ginzburg-Landau Equation 1999 International Journal of Bifurcation and Chaos
Vol. 9, pp. 2209-2214 
article URL 
Abstract: The effect of a finite geometry in the two-dimensional complex Ginzburg-Landau equation is addressed. The presence of boundaries induces the formation of novel states. Target like-solutions appear as robust solutions under Dirichlet boundary conditions. Synchronization of plane waves emitted by boundaries, entrainement by corner emission, and
anchoring of defects by shock lines is also reported.

More info


Also available from LANL preprint server (arXiv.org) as
paper chao-dyn/9812010

The cover of the December 1999 issue of IJBC (Vol.9, #12), is a
spin-off of this article.
BibTeX:

@article{IMEDEA_intranet:306,

  author = {Eguiluz, Victor M. and Hernandez-Garcia, Emilio and Piro, Oreste},

  title = {Boundary Effects in The Complex Ginzburg-Landau Equation},

  journal = {International Journal of Bifurcation and Chaos},

  year = {1999},

  volume = {9},

  pages = {2209--2214},

  url = {http://www.imedea.uib.es/pub_download.php?id=306}

}

Gahl, A. & Balle, S. Influence of the Confinement Factor on the Wavelength-Dependent Output Properties of a Tapered Traveling Wave Semiconductor Amplifier 1999 IEEE Photonics Technology Letters
Vol. 11, pp. 1375-1377 
article URL 
Abstract:

We analyze the influence of the confinement factor on the
output properties of a tapered traveling wave semiconductor
amplifier as a function of the wavelength of the input
field and current injected into the amplifier. The
interaction of the optical field with the amplifying medium
is described by means of a susceptibility function taking
into account both the gain and the carrier-induced
anti-guiding effect, while the beam propagation method is
used to describe the evolution of the field along the
amplifier. We find that, for the same input power, devices
with lower optical confinement factors allow for the same
output optical power with better beam quality and higher
saturation power than devices with higher optical
confinement factor, in agreement with the available
experimental results.

ps file, 380 kB

BibTeX:

@article{IMEDEA_intranet:330,

  author = {A. Gahl and S. Balle},

  title = {Influence of the Confinement Factor on the Wavelength-Dependent Output Properties of a Tapered Traveling Wave Semiconductor Amplifier},

  journal = {IEEE Photonics Technology Letters},

  year = {1999},

  volume = {11},

  pages = {1375--1377},

  url = {http://www.imedea.uib.es/pub_download.php?id=330}

}

Balle, S.; Tolkachova, E.; Miguel, M. San; Tredicce, J. R.; Martín-Regalado, J. & Gahl, A. MECHANISMS OF POLARIZATION SWITCHING IN SINGLE-TRANSVERSE-MODE VCSELS: THERMAL SHIFT AND NONLINEAR SEMICONDUCTOR DYNAMICS 1999 Optics Letters
Vol. 24, pp. 1121-1124 
article URL 
Abstract:

We analyze polarization switching in Vertical Cavity Surface Emitting Lasers
taking into account a proper semiconductor frequency-dependent complex
susceptibility and spin-flip processes. Thermal effects are included as a
varying detuning, and gain differences arise from birefringence splitting. We
find that for large birefringence, gain differences between the two linearly
polarized modes are preponderant and switching occurs due to thermal shift. For
small birefringence, a polarization switching from the high-gain to the
low-gain mode occurs due to the combined effect of birefringence and
semiconductor phase-amplitude coupled dynamics for a finite value of the
carrier spin flip rate.
postscript (1.5Mb)

BibTeX:

@article{IMEDEA_intranet:331,

  author = {S. Balle and E. Tolkachova and M. San Miguel and J. R. Tredicce and J. Martín-Regalado and A. Gahl},

  title = {MECHANISMS OF POLARIZATION SWITCHING IN SINGLE-TRANSVERSE-MODE VCSELS: THERMAL SHIFT AND NONLINEAR SEMICONDUCTOR DYNAMICS},

  journal = {Optics Letters},

  year = {1999},

  volume = {24},

  pages = {1121--1124},

  url = {http://www.imedea.uib.es/pub_download.php?id=331}

}

Giudici, M.; Ackemann, T.; Barland, S.; Tredicce, J. R. & Balle, S. Polarization Dynamics in Vertical-Cavity Surface-Emitting Lasers with Optical Feedback: Experiment and Model 1999 Journal of the Optical Society of America B: Optical Physics
Vol. 16, pp. 2114-2123 
article URL 
Abstract:

We study the polarization resolved dynamics of a VCSEL with mode-matched and
unpolarized optical feedback. The total power can display Low-Frequency Fluctuations
which are associated with drops in power of the dominant linearly polarized mode and
bursts in the power of the depressed one. However, for most parameter values the
VCSEL output does not display Low-Frequency Fluctuations, although antiphase
dynamics among the two linear polarization components has been found. A theoretical
model that includes all reflections in the external cavity with a minimum
computational cost is developed.
postscript (6.5Mb)

BibTeX:

@article{IMEDEA_intranet:332,

  author = {M. Giudici and T. Ackemann and S. Barland and J. R. Tredicce and S. Balle},

  title = {Polarization Dynamics in Vertical-Cavity Surface-Emitting Lasers with Optical Feedback: Experiment and Model},

  journal = {Journal of the Optical Society of America B: Optical Physics},

  year = {1999},

  volume = {16},

  pages = {2114--2123},

  url = {http://www.imedea.uib.es/pub_download.php?id=332}

}

E., Cartwright J. H.; González, D. L. & Piro, O. Universality in Three-Frequency Resonances 1999 invalid journal
Vol. 59, pp. 2902-2906 
article URL 
Abstract: Available as postscript
or Gzip-compressed postscript.
BibTeX:

@article{IMEDEA_intranet:333,

  author = {Cartwright J. H. E. and González, D. L. and Piro, O.},

  title = {Universality in Three-Frequency Resonances},

  journal = {invalid journal},

  year = {1999},

  volume = {59},

  pages = {2902--2906},

  url = {http://www.imedea.uib.es/pub_download.php?id=333}

}

E., Cartwright J. H.; Eguíluz, Victor M.; Hernández-García, E. & Piro, O. Dynamics of Elastic Excitable Media 1999 invalid journal
Vol. 9, pp. 2197-2202 
article URL 
Abstract: The Burridge-Knopoff model of earthquake faults with viscous friction is equivalent to a van der Pol-FitzHugh-Nagumo model for excitable media with elastic coupling. The lubricated creep-slip friction law we use in the Burridge-Knopoff model describes the frictional sliding dynamics of a range of real materials. Low-dimensional structures including synchronized oscillations and propagating fronts are dominant, in agreement with the results of laboratory friction experiments. Here we explore the dynamics of fronts in elastic excitable media.

Available as postscript
or Gzip-compressed postscript.

Also available from LANL preprint server as paper chao-dyn/9905035
BibTeX:

@article{IMEDEA_intranet:338,

  author = {Cartwright J. H. E. and Eguíluz, Victor M. and Hernández-García, E. and Piro, O.},

  title = {Dynamics of Elastic Excitable Media},

  journal = {invalid journal},

  year = {1999},

  volume = {9},

  pages = {2197--2202},

  url = {http://www.imedea.uib.es/pub_download.php?id=338}

}

Calvo, O.; Cartwright, J. H. E.; González, D. L.; Piro, O. & Rosso, O. A. Three-Frequency Resonances in Dynamical Systems 1999 invalid journal
Vol. 9, pp. 2181-2188 
article URL 
Abstract: Available as postscript
or Gzip-compressed postscript.
BibTeX:

@article{IMEDEA_intranet:339,

  author = {Calvo, O. and Cartwright, J. H. E. and González, D. L. and Piro, O. and Rosso, O. A.},

  title = {Three-Frequency Resonances in Dynamical Systems},

  journal = {invalid journal},

  year = {1999},

  volume = {9},

  pages = {2181--2188},

  url = {http://www.imedea.uib.es/pub_download.php?id=339}

}

Eguiluz, Victor M.; Hernandez-Garcia, Emilio; Piro, Oreste & Balle, Salvador Frozen spatial chaos induced by boundaries 1999 Physical Review E - Statistical, Nonlinear, and Soft Matter Physics
Vol. 60, pp. 6571-6579 
article URL 
Abstract:

We show that rather simple but non-trivial boundary conditions could induce the appearance of spatial chaos (that is stationary, stable, but spatially disordered configurations) in extended dynamical systems with very simple dynamics. We exemplify the phenomenon with a nonlinear reaction-diffusion equation in a two-dimensional undulated domain. Concepts from the theory of dynamical systems, and a transverse-single-mode approximation are>used to describe the spatially chaotic structures.

Also available from LANL preprint server
(chao-dyn/9906014)

More info

BibTeX:

@article{IMEDEA_intranet:341,

  author = {Eguiluz, Victor M. and Hernandez-Garcia, Emilio and Piro, Oreste and Balle, Salvador},

  title = {Frozen spatial chaos induced by boundaries},

  journal = {Physical Review E - Statistical, Nonlinear, and Soft Matter Physics},

  year = {1999},

  volume = {60},

  pages = {6571--6579},

  url = {http://www.imedea.uib.es/pub_download.php?id=341}

}

E., Cartwright J. H.; González, D. L. & Piro, O. Nonlinear Dynamics of the Perceived Pitch of Complex Sounds 1999 Physical Review Letters
Vol. 82, pp. 5389-5392 
article URL 
Abstract: Nonlinear Dynamics of the Perceived Pitch of Complex Sounds
BibTeX:

@article{IMEDEA_intranet:343,

  author = {Cartwright J. H. E. and González, D. L. and Piro, O.},

  title = {Nonlinear Dynamics of the Perceived Pitch of Complex Sounds},

  journal = {Physical Review Letters},

  year = {1999},

  volume = {82},

  pages = {5389--5392},

  url = {http://www.imedea.uib.es/pub_download.php?id=343}

}

Balle, Salvador Simple Analytical Approximations for the Gain and Refractive Index Spectra in Quantum-Well Lasers 1998 Physical Review A - Atomic, Molecular, and Optical Physics
Vol. 57, pp. 1304-1312 
article URL 
Abstract:

An analytical expression for the low-temperature optical susceptibility of
Quantum-Well semiconductor lasers is presented based on a simple parabolic
band model. The optical susceptibility obtained keeps the nonlinear
dependence on the carrier density, providing both a broad gain spectrum and a
dispersion curve, so it can be used to analyze the dynamics of multimode
devices or devices with large carrier density variations. The resulting peak
gain, differential peak gain and linewidth enhancement factor are discussed.
CW operation of a single-mode laser is studied as a function of the frequency
of the cavity resonance.

(Postscript file, 28 pages)

BibTeX:

@article{IMEDEA_intranet:252,

  author = {Balle, Salvador},

  title = {Simple Analytical Approximations for the Gain and Refractive Index Spectra in Quantum-Well Lasers},

  journal = {Physical Review A - Atomic, Molecular, and Optical Physics},

  year = {1998},

  volume = {57},

  pages = {1304--1312},

  url = {http://www.imedea.uib.es/pub_download.php?id=252}

}

van der Lem, Han; Martin-Regalado, J.; Balle, S. & Mirasso, C. R. High Bit Rate Generation of Low Chirped Pulses from Vertical-Cavity Surface-Emitting Lasers via External Axial Magnetic Field 1998 IEEE Photonics Technology Letters
Vol. 10, pp. 21-23 
article URL 
Abstract:

The possibility of generating low chirped, fast optical pulses with
linear polarization in vertical-cavity surface-emitting lasers is
numerically explored. We show that, under the influence of an axial
magnetic field, polarization modulation at GHz rates can be achieved
with possible applications in optical clock generation/extraction and
optical communications.

[paper.ps]

BibTeX:

@article{IMEDEA_intranet:260,

  author = {van der Lem, Han and Martin-Regalado, J. and Balle, S. and Mirasso, C. R.},

  title = {High Bit Rate Generation of Low Chirped Pulses from Vertical-Cavity Surface-Emitting Lasers via External Axial Magnetic Field},

  journal = {IEEE Photonics Technology Letters},

  year = {1998},

  volume = {10},

  pages = {21--23},

  url = {http://www.imedea.uib.es/pub_download.php?id=260}

}

Gahl, A.; Balle, S. & San Miguel, M. Polarization Properties of Optically Pumped VCSELs in a Transverse Magnetic Field 1998 Quantum and Semiclassical Optics
Vol. 10, pp. L1-L5 
article URL 
Abstract:

It is shown that the polarization ellipticity of light
emitted by a VCSEL, which is optically pumped with
circularly polarized light, depends significantly on the
strength of a transverse magnetic field. This dependence
can be used for a precise determination of the electron
spin relaxation rate under lasing conditions at room
temperature.
300kB

BibTeX:

@article{IMEDEA_intranet:274,

  author = {Gahl, A. and Balle, S. and San Miguel, M. },

  title = {Polarization Properties of Optically Pumped VCSELs in a Transverse Magnetic Field},

  journal = {Quantum and Semiclassical Optics},

  year = {1998},

  volume = {10},

  pages = {L1--L5},

  url = {http://www.imedea.uib.es/pub_download.php?id=274}

}

Huyet, Guillaume; Balle, Salvador; Giudici, Massimo; Green, Charles K.; Giacomelli, Gianni & Tredicce, Jorge R. Low Frequency Fluctuations and Multimode Operation of a Semiconductor Laser with Optical Feedback 1998 Optics Communications
Vol. 149, pp. 341-347 
article URL 
Abstract:

We experimentally investigate low frequency fluctuations (LFF) in a Fabry-Perot semiconductor laser with optical
feedback from an external mirror. During LFF, the time resolved optical spectrum shows that many longitudinal
modes of the solitary laser enter into the transients. After each LFF event, the excited solitary-laser modes
recover similarly. However, the recovery for the power in each mode is much slower than the recovery of the
total power. The intermode exchange of energy during the recovery indicates that a single-longitudinal mode
description of such LFF behavior will not capture important underlying dynamics. The relevance of multimode
dynamics is confirmed in a feedback experiment where the external mirror is substituted by a diffraction
grating.

(Postscript file, 7 pages, 791 kb)

BibTeX:

@article{IMEDEA_intranet:278,

  author = {Huyet, Guillaume and Balle, Salvador and Giudici, Massimo and Green, Charles K. and Giacomelli, Gianni and Tredicce, Jorge R.},

  title = {Low Frequency Fluctuations and Multimode Operation of a Semiconductor Laser with Optical Feedback},

  journal = {Optics Communications},

  year = {1998},

  volume = {149},

  pages = {341--347},

  url = {http://www.imedea.uib.es/pub_download.php?id=278}

}

Valle, A.; Martin-Regalado, J.; Pesquera, L.; Balle, S. & San Miguel, M. Polarization dynamics of birefringent index-guided Vertical-Cavity Surface-Emitting Lasers 1998 Proceedings of the SPIE
Vol. 3283, pp. 280-291 
inproceedings URL 
Abstract:

We study the polarization behavior of birefringent multi--transverse
mode index--guided Vertical--Cavity Surface--Emitting Lasers (VCSELs)
during CW and modulation operation. The model we use incorporates the
linewidth enhancement factor, different carriers populations associated with
different magnetic sublevels of the conduction and heavy hole valence
bands in quantum well media, spin-flip relaxation processes and cavity
anisotropies. The effect of carrier diffusion and spatial hole
burning on the polarization behavior within the fundamental mode
regime is also considered. We find that spin-flip dynamics and the
linewidth enhancement factor are crucial for the selection of the polarization
state corresponding to a given injection current. We also analyze the
direct-current polarization modulation response for both the small and
large signal modulation regimes. In both cases the current is
modulated around the polarization switching (PS) current, but in the
large signal modulation regime the current goes from below threshold
to above the PS current. A frequency doubled polarized output is
obtained under large signal modulation for modulation frequencies
smaller than 10 MHz. At greater frequencies (around 100 MHz)
transient mode polarization partition noise becomes important. At the
greatest considered frequency (1 GHz) no PS is observed. Finally the
effect of multiple transverse mode operation is addressed by
considering the two lowest order modes: LP01 and LP11.

paper.ps

BibTeX:

@inproceedings{IMEDEA_intranet:283,

  author = {Valle, A. and Martin-Regalado, J. and Pesquera, L. and Balle, S. and San Miguel, M.},

  title = {Polarization dynamics of birefringent index-guided Vertical-Cavity Surface-Emitting Lasers},

  journal = {Proceedings of the SPIE},

  year = {1998},

  volume = {3283},

  pages = {280--291},

  url = {http://www.imedea.uib.es/pub_download.php?id=283}

}

Eguíluz, Víctor M.; Hernández-García, Emilio; Piro, Oreste & Balle, Salvador Boundary induced frozen chaos 1998 Anales de Física
Vol. 4, pp. 215-216 
article URL 
Abstract:

FISES97, Proceedings of the VIII Spanish
Meeting on Statistical Physics, Edited by J.A. Cuesta and A. Sánchez.
Anales de Física, Monografías RSEF, vol. 4, Editorial CIEMAT, Madrid,
215-216 (1998).

BibTeX:

@article{IMEDEA_intranet:300,

  author = {Eguíluz, Víctor M. and Hernández-García, Emilio and Piro, Oreste and Balle, Salvador},

  title = {Boundary induced frozen chaos},

  journal = {Anales de Física},

  year = {1998},

  volume = {4},

  pages = {215--216},

  url = {http://www.imedea.uib.es/pub_download.php?id=300}

}

Vashenko, G.; Giudici, M.; Rocca, J. J.; Menoni, C. S.; Tredicce, J. R. & Balle, S. Temporal Dynamics of Semiconductor Lasers with Optical Feedback 1998 Physical Review Letters
Vol. 81, pp. 5536-5539 
article URL 
Abstract:

We measure the temporal evolution of the intensity of an edge emitting
semiconductor laser with delayed optical feedback for time spans ranging from
4.5 to 65 ns with a time resolution from 16ps to 230ps respectively. Spectrally
resolved streak camera measurements show that the fast pulsing of the total
intensity is a consequence of the time delay and multimode operation of the
laser. We experimentally observe that the instabilities at low
frequency are generated by the interaction among different modes of the
laser.

(Postscript file, 13 pages, 900 kb)

BibTeX:

@article{IMEDEA_intranet:312,

  author = {Vashenko, G. and Giudici, M. and Rocca, J. J. and Menoni, C. S. and Tredicce, J. R. and Balle, S.},

  title = {Temporal Dynamics of Semiconductor Lasers with Optical Feedback},

  journal = {Physical Review Letters},

  year = {1998},

  volume = {81},

  pages = {5536--5539},

  url = {http://www.imedea.uib.es/pub_download.php?id=312}

}

E., Cartwright J. H.; González, D. L. & Piro, O. On a New Nonlinear Model for Pitch Perception 1998 invalid journal, pp. 193-194  article URL 
BibTeX:

@article{IMEDEA_intranet:334,

  author = {Cartwright J. H. E. and González, D. L. and Piro, O.},

  title = {On a New Nonlinear Model for Pitch Perception},

  journal = {invalid journal},

  year = {1998},

  pages = {193--194},

  url = {http://www.imedea.uib.es/pub_download.php?id=334}

}

Calvo, O.; E., Cartwright J. H.; González, D. L.; Piro, O. & Sportolari, F. Three-Frequency Dynamics of Coupled Phase-Locked Loops 1998 invalid journal, pp. 91-94  article URL 
BibTeX:

@article{IMEDEA_intranet:335,

  author = {Calvo, O. and Cartwright J. H. E. and González, D. L. and Piro, O. and Sportolari, F.},

  title = {Three-Frequency Dynamics of Coupled Phase-Locked Loops},

  journal = {invalid journal},

  year = {1998},

  pages = {91--94},

  url = {http://www.imedea.uib.es/pub_download.php?id=335}

}

E., Cartwright J. H.; González, D. L. & Piro, O. On Pitch Perception of Complex Sounds: Nonlinearity Revisited 1998 invalid journal, pp. 141-146  article URL 
BibTeX:

@article{IMEDEA_intranet:337,

  author = {Cartwright J. H. E. and González, D. L. and Piro, O.},

  title = {On Pitch Perception of Complex Sounds: Nonlinearity Revisited},

  journal = {invalid journal},

  year = {1998},

  pages = {141--146},

  url = {http://www.imedea.uib.es/pub_download.php?id=337}

}

Cartwright, J. H. E.; Hernández-García, E. & Piro, O. Burridge-Knopoff Models as Elastic Excitable Media 1997 Physical Review Letters
Vol. 79, pp. 527-530 
article URL 
Abstract: Burridge-Knopoff models as elastic excitable media

We construct a model of an excitable medium with elastic rather than the usual
diffusive coupling. We explore the dynamics of elastic excitable media, which
we find to be dominated by low dimensional structures, including global
oscillations, period-doubled pacemakers, and propagating fronts. We suggest
that examples of elastic excitable media are to be found in such diverse physical
systems as Burridge-Knopoff models of frictional sliding, electronic
transmission lines, and active optical waveguides.

Also available from Los Alamos CNLS server:
chao-dyn/9708008
BibTeX:

@article{IMEDEA_intranet:255,

  author = {Cartwright, J. H. E. and Hernández-García, E. and Piro, O.},

  title = {Burridge-Knopoff Models as Elastic Excitable Media},

  journal = {Physical Review Letters},

  year = {1997},

  volume = {79},

  pages = {527--530},

  url = {http://www.imedea.uib.es/pub_download.php?id=255}

}

Martín-Regalado, J.; Balle, S. & San Miguel, M. Polarization and transverse mode dynamics of gain-guided Vertical-Cavity Surface Emitting Lasers 1997 Optics Letters
Vol. 22, pp. 460-462 
article URL 
Abstract:

Transverse mode competition and polarization selection in gain-guided Vertical
Cavity Surface Emitting Lasers are studied using a transverse continuous model
which incorporates basic physical mechanisms of polarization dynamics.
Polarization stability and polarization switching within the fundamental
Gaussian mode are described. The first order transverse mode always starts
lasing orthogonally polarized to the fundamental one. At larger currents
polarization coexistence with several active transverse modes occur. These
results are shown to be sensitive to the carrier spin-flip relaxation rate.

transverse.ps

BibTeX:

@article{IMEDEA_intranet:257,

  author = {Martín-Regalado, J. and Balle, S. and San Miguel, M.},

  title = {Polarization and transverse mode dynamics of gain-guided Vertical-Cavity Surface Emitting Lasers},

  journal = {Optics Letters},

  year = {1997},

  volume = {22},

  pages = {460--462},

  url = {http://www.imedea.uib.es/pub_download.php?id=257}

}

Martin-Regalado, J.; Balle, S.; San Miguel, M.; Valle, A. & Pesquera, L. Polarization and transverse mode selection in quantum-well Vertical-Cavity Surface-Emitting Lasers: index- and gain-guided devices 1997 Journal of Optics B-Quantum and Semiclassical Optics
Vol. 9, pp. 713-736 
article URL 
Abstract:

We study polarization switching and transverse mode competition in
Vertical Cavity Surface Emitting Lasers in the absence of temperature
effects. We use a model that incorporates the vector nature of the
laser field, saturable dispersion, different carrier populations
associated with different magnetic sublevels of the conduction and
heavy hole valence bands in quantum well media, spin-flip relaxation
processes and cavity birefringence and dichroism. We consider both
index-guided and gain-guided VCSELs, and we find that spin-flip
dynamics and linewidth enhancement factor are crucial for the
selection of the polarization state corresponding to a given injection
current. For index-guided VCSELs the effect of spatial hole burning
on the polarization behavior within the fundamental mode regime is
discussed. For gain-guided VCSELs, transverse mode and polarization
selection is studied within a Maxwell-Bloch approximation which
includes field diffraction and carrier diffusion. Polarization
switching is found in the fundamental mode regime. The first order
transverse mode starts lasing orthogonally polarized to the
fundamental mode. At larger currents polarization coexistence with
several active transverse modes occurs.

text.ps
figures.ps


BibTeX:

@article{IMEDEA_intranet:261,

  author = {Martin-Regalado, J. and Balle, S. and San Miguel, M. and Valle, A. and Pesquera, L.},

  title = {Polarization and transverse mode selection in quantum-well Vertical-Cavity Surface-Emitting Lasers: index- and gain-guided devices},

  journal = {Journal of Optics B-Quantum and Semiclassical Optics},

  year = {1997},

  volume = {9},

  pages = {713--736},

  url = {http://www.imedea.uib.es/pub_download.php?id=261}

}

Martin-Regalado, J.; Balle, S. & Abraham, N. B. Spatio-temporal dynamics of gain-guided semiconductor laser arrays 1996 IEEE Journal of Quantum Electronics
Vol. 32(2), pp. 257-266 
article DOI URL 
Abstract:

A continuous model based on the coupled field-matter Maxwell-Bloch
equations for a two-level homogeneously broadened single mode laser
is developed. The model includes a Langevin formulation to model
thermal and spontaneous emission noises and accounts for carrier
diffusion, optical field diffraction and current spreading. Our
model is flexible enough to simulate any gain-guided longitudinally
uniform laser geometry and is applied to both a single-stripe and a
four-stripe gain-guided semiconductor lasers where the influence
of the injection current, the interstripe distance and carrier
diffusion is discussed within the context of the laser dynamics. We
show that an array operating with quasi-independent stripes may be
achieved at low pumps and larger interstripe distances. However as
injection current is increased or the interstripe distance is
decreased, the device passes through a variety of dynamical
instabilities which can be analyzed in the context of lateral cavity
modes. Moreover, we also show that the array dynamics is strongly
influenced by carrier diffusion which may also lead to different
thresholds for each element of the array.

[array.ps.gz]

BibTeX:

@article{IMEDEA_intranet:163,

  author = {Martin-Regalado, J. and Balle, S. and Abraham, N. B.},

  title = {Spatio-temporal dynamics of gain-guided semiconductor laser arrays},

  journal = {IEEE Journal of Quantum Electronics},

  year = {1996},

  volume = {32},

  number = {2},

  pages = {257--266},

  url = {http://www.imedea.uib.es/pub_download.php?id=163},

  doi = {http://dx.doi.org/10.1109/3.481873}

}

Martin-Regalado, J.; Balle, S. & Abraham, N. B. Spatio-temporal dynamics of gain-guided semiconductor laser arrays and broad area lasers 1996 Proceedings of the SPIE
Vol. 2693(2693), pp. 369 
inproceedings URL 
Abstract:

Spatio-Temporal dynamics of a gain-guided semiconductor lasers is modeled based
on the Maxwell-Bloch equations for a two-level homogeneously broadened single
mode laser. The influence of some carrier-sensitive mechanism, as carrier
diffusion or injection current, on the dynamics of these gain-guided devices is
studied.

[gain-g.ps.gz]

BibTeX:

@inproceedings{IMEDEA_intranet:164,

  author = {Martin-Regalado, J. and Balle, S. and Abraham, N. B.},

  title = {Spatio-temporal dynamics of gain-guided semiconductor laser arrays and broad area lasers},

  journal = {Proceedings of the SPIE},

  year = {1996},

  volume = {2693},

  number = {2693},

  pages = {369},

  url = {http://www.imedea.uib.es/pub_download.php?id=164}

}

Martin-Regalado, J.; van Tartwijk, G. H. M.; Balle, S. & San Miguel, M. Effects of external optical feedback in broad-area lasers 1996 Procedings
Vol. 6, pp. 205-208 
inproceedings URL 
Abstract:

External optical feedback is applied to broad-area lasers to permit
lateral mode selection and pattern stabilization of the output beam
which usually suffers from undesirable filamentation.

[IPR_96.ps]

BibTeX:

@inproceedings{IMEDEA_intranet:166,

  author = {Martin-Regalado, J. and van Tartwijk, G. H. M. and Balle, S. and San Miguel, M.},

  title = {Effects of external optical feedback in broad-area lasers},

  journal = {Procedings},

  year = {1996},

  volume = {6},

  pages = {205--208},

  url = {http://www.imedea.uib.es/pub_download.php?id=166}

}

Martin-Regalado, J.; van Tartwijk, G. H. M.; Balle, S. & San Miguel, M. Mode control and pattern stabilization in broad-area lasers by optical feedback 1996 Physical Review A - Atomic, Molecular, and Optical Physics
Vol. 54(6), pp. 5386-5393 
article DOI URL 
Abstract:

Broad-area lasers exhibit complex spatio-temporal behavior due to multilateral
mode operation, emitting filamented beams with low spatial coherence. Using
weak external optical feedback we demonstrate that some degree of lateral mode
selection and pattern stabilization of these lasers can be obtained under
appropriate feedback conditions.

[br_fed.ps]

BibTeX:

@article{IMEDEA_intranet:167,

  author = {Martin-Regalado, J. and van Tartwijk, G. H. M. and Balle, S. and San Miguel, M.},

  title = {Mode control and pattern stabilization in broad-area lasers by optical feedback},

  journal = {Physical Review A - Atomic, Molecular, and Optical Physics},

  year = {1996},

  volume = {54},

  number = {6},

  pages = {5386--5393},

  url = {http://www.imedea.uib.es/pub_download.php?id=167},

  doi = {http://dx.doi.org/10.1103/PhysRevA.54.5386}

}

Homar, M.; Balle, S. & San Miguel, M. Mode Competition in a Fabry Perot Semiconductor Laser:Travelling Wave Model with Asymmetric Dynamical Gain 1996 Optics Communications
Vol. 131, pp. 380-390 
article URL 
Abstract:

Mode Competition in a Fabry Perot Semiconductor Laser:Travelling Wave Model with Asymmetric Dynamical Gain

BibTeX:

@article{IMEDEA_intranet:49,

  author = {Homar, M. and Balle, S. and San Miguel, M.},

  title = {Mode Competition in a Fabry Perot Semiconductor Laser:Travelling Wave Model with Asymmetric Dynamical Gain},

  journal = {Optics Communications},

  year = {1996},

  volume = {131},

  pages = {380--390},

  url = {http://www.imedea.uib.es/pub_download.php?id=49}

}

Cartwright, J. H. E.; Feingold, M. & Piro, O. Chaotic Advection in Three-Dimensional Unsteady Incompressible Laminar Flow 1996 invalid journal
Vol. 316, pp. 259-284 
article URL 
Abstract: As postscript (5.5 Mb)
or Gzip-compressed postscript (1.4 Mb).
BibTeX:

@article{IMEDEA_intranet:80,

  author = {Cartwright, J. H. E. and Feingold, M. and Piro, O.},

  title = {Chaotic Advection in Three-Dimensional Unsteady Incompressible Laminar Flow},

  journal = {invalid journal},

  year = {1996},

  volume = {316},

  pages = {259--284},

  url = {http://www.imedea.uib.es/pub_download.php?id=80}

}

Balle, S.; Homar, M. & San Miguel, M. Statistical Properties of the Spectrum of Light Pulses in Fast Pseudorandom Word Modulation of a Single Mode Semiconductor laser 1995 IEEE Journal of Quantum Electronics
Vol. 31, pp. 1401-1408 
article DOI URL 
Abstract:

Statistical Properties of the Spectrum of Light Pulses in Fast Pseudorandom Word Modulation of a Single Mode Semiconductor laser

BibTeX:

@article{IMEDEA_intranet:19,

  author = {Balle, S. and Homar, M. and San Miguel, M.},

  title = {Statistical Properties of the Spectrum of Light Pulses in Fast Pseudorandom Word Modulation of a Single Mode Semiconductor laser},

  journal = {IEEE Journal of Quantum Electronics},

  year = {1995},

  volume = {31},

  pages = {1401--1408},

  url = {http://www.imedea.uib.es/pub_download.php?id=19},

  doi = {http://dx.doi.org/10.1109/3.400390}

}

E., Cartwright J. H.; González, D. L.; Morettini, L.; Piro, O.; Rosso, O. & Sportolari, F. Pitch Perception of Complex Sounds: Nonlinearity Revisited. 1995 invalid journal, pp. 319-328  article URL 
BibTeX:

@article{IMEDEA_intranet:32,

  author = {Cartwright J. H. E. and González, D. L. and Morettini, L. and Piro, O. and Rosso, O. and Sportolari, F.},

  title = {Pitch Perception of Complex Sounds: Nonlinearity Revisited.},

  journal = {invalid journal},

  year = {1995},

  pages = {319--328},

  url = {http://www.imedea.uib.es/pub_download.php?id=32}

}

Feingold, M. & Piro, O. Localized States in the Chaotic Ce Atom 1995 invalid journal
Vol. 51, pp. 4279 
article URL 
Abstract: Localized States in the Chaotic Ce Atom
BibTeX:

@article{IMEDEA_intranet:52,

  author = {Feingold, M. and Piro, O.},

  title = {Localized States in the Chaotic Ce Atom},

  journal = {invalid journal},

  year = {1995},

  volume = {51},

  pages = {4279},

  url = {http://www.imedea.uib.es/pub_download.php?id=52}

}

Cartwright, J. H. E.; Feingold, M. & Piro, O. Global Diffusion in a Realistic Three-Dimensional Time-Dependent Nonturbulent Fluid Flow 1995 Physical Review Letters
Vol. 75, pp. 3669-3672 
article URL 
Abstract: Global diffusion in a realistic three-dimensional time-dependent nonturbulent fluid flow

As postscript (1.4 Mb)
or Gzip-compressed postscript (0.4 Mb).
BibTeX:

@article{IMEDEA_intranet:58,

  author = {Cartwright, J. H. E. and Feingold, M. and Piro, O.},

  title = {Global Diffusion in a Realistic Three-Dimensional Time-Dependent Nonturbulent Fluid Flow},

  journal = {Physical Review Letters},

  year = {1995},

  volume = {75},

  pages = {3669--3672},

  url = {http://www.imedea.uib.es/pub_download.php?id=58}

}

Balle, S. Effective Two-Level-Model with Asymmetric Gain for Laser Diodes 1995 Optics Communications
Vol. 119, pp. 227-235 
article URL 
Abstract:

Effective Two-Level-Model with Asymmetric Gain for Laser Diodes

BibTeX:

@article{IMEDEA_intranet:66,

  author = {Balle, S.},

  title = {Effective Two-Level-Model with Asymmetric Gain for Laser Diodes},

  journal = {Optics Communications},

  year = {1995},

  volume = {119},

  pages = {227--235},

  url = {http://www.imedea.uib.es/pub_download.php?id=66}

}

Cartwright, J. H. E. & Piro, O. Chaos in Biology 1995 invalid journal, pp. 18-28  article URL 
BibTeX:

@article{IMEDEA_intranet:81,

  author = {Cartwright, J. H. E. and Piro, O.},

  title = {Chaos in Biology},

  journal = {invalid journal},

  year = {1995},

  pages = {18--28},

  url = {http://www.imedea.uib.es/pub_download.php?id=81}

}

Cartwright, J. H. E.; Feingold, M. & Piro, O. Passive Scalars and Three-Dimensional Liouvillian Maps 1994 Physica D
Vol. 76, pp. 22-33 
article URL 
Abstract: As postscript (3.3Mb)
or Gzip-compressed postscript (0.35 Mb).
BibTeX:

@article{IMEDEA_intranet:111,

  author = {Cartwright, J. H. E. and Feingold, M. and Piro, O.},

  title = {Passive Scalars and Three-Dimensional Liouvillian Maps},

  journal = {Physica D},

  year = {1994},

  volume = {76},

  pages = {22--33},

  url = {http://www.imedea.uib.es/pub_download.php?id=111}

}

Rutman, O.; Feingold, M.; Avishai, Y. & Piro, O. Localization in Quasi-1D systems: Perturbation Theory and Scaling 1994 invalid journal
Vol. 28, pp. 329 
article URL 
Abstract: Localization in Quasi-1D systems: Perturbation Theory and Scaling
BibTeX:

@article{IMEDEA_intranet:112,

  author = {Rutman, O. and Feingold, M. and Avishai, Y. and Piro, O.},

  title = {Localization in Quasi-1D systems: Perturbation Theory and Scaling},

  journal = {invalid journal},

  year = {1994},

  volume = {28},

  pages = {329},

  url = {http://www.imedea.uib.es/pub_download.php?id=112}

}

Chen, Z.; Abraham, N. B.; Balle, S.; DAngelo, E. & Tredicce, J. Space-Time Dynamics in the Transverse Patterns of a Laser from a Model Not Restricted a priori to a Few Modes 1994 Proceedings of the SPIE
Vol. 4(2099), pp. 2-9 
inproceedings URL 
Abstract:

Space-Time Dynamics in the Transverse Patterns of a Laser from a Model Not Restricted a priori to a Few Modes

BibTeX:

@inproceedings{IMEDEA_intranet:114,

  author = {Chen, Z. and Abraham, N. B. and Balle, S. and DAngelo, E. and Tredicce, J.},

  title = {Space-Time Dynamics in the Transverse Patterns of a Laser from a Model Not Restricted a priori to a Few Modes},

  journal = {Proceedings of the SPIE},

  year = {1994},

  volume = {4},

  number = {2099},

  pages = {2--9},

  url = {http://www.imedea.uib.es/pub_download.php?id=114}

}

Piro, O. The Object Oriented Programing Paradigm in Physics 1994 invalid journal  article URL 
BibTeX:

@article{IMEDEA_intranet:115,

  author = {Piro, O.},

  title = {The Object Oriented Programing Paradigm in Physics},

  journal = {invalid journal},

  year = {1994},

  url = {http://www.imedea.uib.es/pub_download.php?id=115}

}

Colet, P. & Balle, S. Spatial Hole Burning Effects in the Emission Characteristics of DFB Laser Diodes 1994 Procedings
Vol. 3, pp. 108-110 
inproceedings URL 
Abstract:

Spatial Hole Burning Effects in the Emission Characteristics of DFB Laser Diodes

BibTeX:

@inproceedings{IMEDEA_intranet:23,

  author = {Colet, P. and Balle, S.},

  title = {Spatial Hole Burning Effects in the Emission Characteristics of DFB Laser Diodes},

  journal = {Procedings},

  year = {1994},

  volume = {3},

  pages = {108--110},

  url = {http://www.imedea.uib.es/pub_download.php?id=23}

}

Fernández-Casares, S.; Balle, S.; Menéndez-Valdés, P. & San Miguel, M. Variable Waveguide Model for Gain-Guided Laser Arrays 1994
Vol. 3Integrated Photonics Research 1994, pp. 354-356 
inbook URL 
Abstract:

Variable Waveguide Model for Gain-Guided Laser Arrays

BibTeX:

@inbook{IMEDEA_intranet:4,

  author = {Fernández-Casares, S. and Balle, S. and Menéndez-Valdés, P. and San Miguel, M.},

  title = {Variable Waveguide Model for Gain-Guided Laser Arrays},

  booktitle = {Integrated Photonics Research 1994},

  publisher = {OSA Technical Digest Series, vol. 3},

  year = {1994},

  volume = {3},

  pages = {354--356},

  url = {http://www.imedea.uib.es/pub_download.php?id=4}

}

Fernández-Casares, S.; Balle, S. & Menéndez-Valdés, P. Mode Beating and Spontaneous Emission Noise Effects in a Variable Waveguide Model for the Dynamics of Gain-Guided Semiconductor Laser Arrays 1994 IEEE Journal of Quantum Electronics
Vol. 30, pp. 2449-2457 
article DOI URL 
Abstract:

Mode Beating and Spontaneous Emission Noise Effects in a Variable Waveguide Model for the Dynamics of Gain-Guided Semiconductor Laser Arrays

BibTeX:

@article{IMEDEA_intranet:50,

  author = {Fernández-Casares, S. and Balle, S. and Menéndez-Valdés, P.},

  title = {Mode Beating and Spontaneous Emission Noise Effects in a Variable Waveguide Model for the Dynamics of Gain-Guided Semiconductor Laser Arrays},

  journal = {IEEE Journal of Quantum Electronics},

  year = {1994},

  volume = {30},

  pages = {2449--2457},

  url = {http://www.imedea.uib.es/pub_download.php?id=50},

  doi = {http://dx.doi.org/10.1109/3.333695}

}

Balle, S.; San Miguel, M.; Abraham, N. B.; Tredicce, J. R.; Alvarez, R.; DAngelo, E.; Gambhir, A.; Thornburg, K. & Roy, R. Transients in Multivariable Dynamical Systems Depend onwhich Parameter is Switched as Illustrated in Lasers 1994 Physical Review Letters
Vol. 72, pp. 3510-3513 
article URL 
Abstract:

Transients in Multivariable Dynamical Systems Depend onwhich Parameter is Switched as Illustrated in Lasers

BibTeX:

@article{IMEDEA_intranet:7,

  author = {Balle, S. and San Miguel, M. and Abraham, N. B. and Tredicce, J. R. and Alvarez, R. and DAngelo, E. and Gambhir, A. and Thornburg, K. and Roy, R.},

  title = {Transients in Multivariable Dynamical Systems Depend onwhich Parameter is Switched as Illustrated in Lasers},

  journal = {Physical Review Letters},

  year = {1994},

  volume = {72},

  pages = {3510--3513},

  url = {http://www.imedea.uib.es/pub_download.php?id=7}

}

Cecchi, G. A.; González, D. L.; Magnasco, M. O.; Mindlin, G. B.; Piro, O. & Santillán, A. J. Periodically Kicked Hard Oscillators 1993 Chaos
Vol. 3, pp. 51 
article URL 
Abstract: Periodically Kicked Hard Oscillators
BibTeX:

@article{IMEDEA_intranet:121,

  author = {Cecchi, G. A. and González, D. L. and Magnasco, M. O. and Mindlin, G. B. and Piro, O. and Santillán, A. J.},

  title = {Periodically Kicked Hard Oscillators},

  journal = {Chaos},

  year = {1993},

  volume = {3},

  pages = {51},

  url = {http://www.imedea.uib.es/pub_download.php?id=121}

}

Homar, M.; San Miguel, M. & Balle, S. Semiconductor Lasers with Weak Optical Feedback: Spectral Properties and Frequency Dependent Lasers 1993 Optics Letters
Vol. 18, pp. 1329-1331 
article URL 
Abstract:

We report a calculation of the field spectrum of a single-mode semiconductor laser with weak optical feedback and
compare it with numerical simulations. We show that the change in the spectral properties induced by weak
feedback can be obtained by a simpler model that introduces frequency-dependent losses. The increase in the
asymmetry of the side peaks of the spectrum with increasing feedback delay time is characterized.

BibTeX:

@article{IMEDEA_intranet:155,

  author = {Homar, M. and San Miguel, M. and Balle, S.},

  title = {Semiconductor Lasers with Weak Optical Feedback: Spectral Properties and Frequency Dependent Lasers},

  journal = {Optics Letters},

  year = {1993},

  volume = {18},

  pages = {1329--1331},

  url = {http://www.imedea.uib.es/pub_download.php?id=155}

}

Balle, S.; Abraham, N. B.; Colet, P. & San Miguel, M. Parametric Dependence of Stochastic Frequency Variations in the Gain-Swtiching of a Single-Mode Laser Diode 1993 IEEE Journal of Quantum Electronics
Vol. 29, pp. 33-41 
article DOI URL 
Abstract:

Parametric Dependence of Stochastic Frequency Variations in the Gain-Swtiching of a Single-Mode Laser Diode

BibTeX:

@article{IMEDEA_intranet:40,

  author = {Balle, S. and Abraham, N. B. and Colet, P. and San Miguel, M.},

  title = {Parametric Dependence of Stochastic Frequency Variations in the Gain-Swtiching of a Single-Mode Laser Diode},

  journal = {IEEE Journal of Quantum Electronics},

  year = {1993},

  volume = {29},

  pages = {33--41},

  url = {http://www.imedea.uib.es/pub_download.php?id=40},

  doi = {http://dx.doi.org/10.1109/3.199242}

}

Torrent, M. C. & Balle, S. Encendido del láser y detección de señales inyectadas en láseres semiconductores 1993 Optica Pura y Aplicada
Vol. 26, pp. 878 
article URL 
Abstract:

Encendido del láser y detección de señales inyectadas en láseres semiconductores

BibTeX:

@article{IMEDEA_intranet:63,

  author = {Torrent, M. C. and Balle, S.},

  title = {Encendido del láser y detección de señales inyectadas en láseres semiconductores},

  journal = {Optica Pura y Aplicada},

  year = {1993},

  volume = {26},

  pages = {878},

  url = {http://www.imedea.uib.es/pub_download.php?id=63}

}

Balle, S.; Banerjee, R. & San Miguel, M. Effects of an Intensity Dependent Linewidth Enhancement Factor on the Transient Spectral Properties of a Gain-Switched Single-Mode Semiconductor Laser 1993 IEEE Photonics Technology Letters
Vol. 5, pp. 503-506 
article DOI URL 
Abstract:

Effects of an Intensity Dependent Linewidth Enhancement Factor on the Transient Spectral Properties of a Gain-Switched Single-Mode Semiconductor Laser

BibTeX:

@article{IMEDEA_intranet:65,

  author = {Balle, S. and Banerjee, R. and San Miguel, M.},

  title = {Effects of an Intensity Dependent Linewidth Enhancement Factor on the Transient Spectral Properties of a Gain-Switched Single-Mode Semiconductor Laser},

  journal = {IEEE Photonics Technology Letters},

  year = {1993},

  volume = {5},

  pages = {503--506},

  url = {http://www.imedea.uib.es/pub_download.php?id=65},

  doi = {http://dx.doi.org/10.1109/68.215262}

}

Torrent, M. C.; Balle, S.; San Miguel, M. & Sancho, J. M. Detection of a Weak External Signal via the Switch-On Time Statistics of a Semiconductor Laser 1993 Physical Review A - Atomic, Molecular, and Optical Physics
Vol. 47(4), pp. 3390-3395 
article URL 
Abstract:

Detection of a Weak External Signal via the Switch-On Time Statistics of a Semiconductor Laser

BibTeX:

@article{IMEDEA_intranet:69,

  author = {Torrent, M. C. and Balle, S. and San Miguel, M. and Sancho, J. M.},

  title = {Detection of a Weak External Signal via the Switch-On Time Statistics of a Semiconductor Laser},

  journal = {Physical Review A - Atomic, Molecular, and Optical Physics},

  year = {1993},

  volume = {47},

  number = {4},

  pages = {3390--3395},

  url = {http://www.imedea.uib.es/pub_download.php?id=69}

}

Bromley, D.; DAngelo, E. J.; Grassi, H.; Mathis, C.; Tredicce, J. R. & Balle, S. Anticipation of the Switch-Off and Delay of the Switch-On of a Laser with a Sweeping Parameter 1993 Optics Communications
Vol. 99, pp. 65-70 
article URL 
Abstract:

Anticipation of the Switch-Off and Delay of the Switch-On of a Laser with a Sweeping Parameter

BibTeX:

@article{IMEDEA_intranet:82,

  author = {Bromley, D. and DAngelo, E. J. and Grassi, H. and Mathis, C. and Tredicce, J. R. and Balle, S.},

  title = {Anticipation of the Switch-Off and Delay of the Switch-On of a Laser with a Sweeping Parameter},

  journal = {Optics Communications},

  year = {1993},

  volume = {99},

  pages = {65--70},

  url = {http://www.imedea.uib.es/pub_download.php?id=82}

}

Balle, S.; Mirasso, C. R.; Sapia, A. & Spano, P. Analytical Results of the Switch-on Time Statistics in DFB Laser Diodes Driven by ShortTriangular Pulses 1993 Applied Physics Letters
Vol. 63, pp. 1721 
article URL 
Abstract:

Analytical Results of the Switch-on Time Statistics in DFB Laser Diodes Driven by ShortTriangular Pulses

BibTeX:

@article{IMEDEA_intranet:83,

  author = {Balle, S. and Mirasso, C. R. and Sapia, A. and Spano, P.},

  title = {Analytical Results of the Switch-on Time Statistics in DFB Laser Diodes Driven by ShortTriangular Pulses},

  journal = {Applied Physics Letters},

  year = {1993},

  volume = {63},

  pages = {1721},

  url = {http://www.imedea.uib.es/pub_download.php?id=83}

}

Buric, N.; Percival, I. C. & Piro, O. Exact Results on the Critical Function for the Motion of an Electron Driven by Two Plane Waves 1992 invalid journal
Vol. 165, pp. 320 
article URL 
Abstract: Exact Results on the Critical Function for the Motion of an Electron Driven by Two Plane Waves
BibTeX:

@article{IMEDEA_intranet:141,

  author = {Buric, N. and Percival, I. C. and Piro, O.},

  title = {Exact Results on the Critical Function for the Motion of an Electron Driven by Two Plane Waves},

  journal = {invalid journal},

  year = {1992},

  volume = {165},

  pages = {320},

  url = {http://www.imedea.uib.es/pub_download.php?id=141}

}

Buric, N.; Cartwright, J. H. E.; Percival, I. C. & Piro, O. On Modular Smoothing and Scaling Functions for Mode Locking 1992 invalid journal
Vol. 163, pp. 63-67 
article URL 
Abstract: On modular smoothing and scaling functions for mode locking

As postscript (2 Mb)
or Gzip-compressed postscript (0.2 Mb).
BibTeX:

@article{IMEDEA_intranet:142,

  author = {Buric, N. and Cartwright, J. H. E. and Percival, I. C. and Piro, O.},

  title = {On Modular Smoothing and Scaling Functions for Mode Locking},

  journal = {invalid journal},

  year = {1992},

  volume = {163},

  pages = {63--67},

  url = {http://www.imedea.uib.es/pub_download.php?id=142}

}

Cartwright, J. H. E. & Piro, O. The Dynamics of Runge-Kutta Methods 1992 invalid journal
Vol. 2, pp. 427-449 
article URL 
Abstract: The dynamics of Runge-Kutta methods

As postscript (4 Mb)
or Gzip-compressed postscript (0.5 Mb).
BibTeX:

@article{IMEDEA_intranet:143,

  author = {Cartwright, J. H. E. and Piro, O.},

  title = {The Dynamics of Runge-Kutta Methods},

  journal = {invalid journal},

  year = {1992},

  volume = {2},

  pages = {427--449},

  url = {http://www.imedea.uib.es/pub_download.php?id=143}

}

DAngelo, E. J.; Green, C.; Tredicce, J. R.; Abraham, N. B.; Z. Chen, Z. & Balle, S. Symmetry Breaking, Dynamical Pulsations and Turbulence in the Transverse Intensity Patterns of a Laser: the Role Played by Defects 1992 Physica D
Vol. 61, pp. 6-24 
article URL 
Abstract:

Symmetry Breaking, Dynamical Pulsations and Turbulence in the Transverse Intensity Patterns of a Laser: the Role Played by Defects

BibTeX:

@article{IMEDEA_intranet:15,

  author = {DAngelo, E. J. and Green, C. and Tredicce, J. R. and Abraham, N. B. and Z. Chen, Z. and Balle, S.},

  title = {Symmetry Breaking, Dynamical Pulsations and Turbulence in the Transverse Intensity Patterns of a Laser: the Role Played by Defects},

  journal = {Physica D},

  year = {1992},

  volume = {61},

  pages = {6--24},

  url = {http://www.imedea.uib.es/pub_download.php?id=15}

}

Balle, S.; de Pasquale, F.; Abraham, N.B. & M. San Miguel, M. Statistics of the Transient Frequency Modulation in the Switch-On of a Single-Mode Semiconductor Laser 1992 Physical Review A - Atomic, Molecular, and Optical Physics
Vol. 45, pp. 1955-1966 
article URL 
Abstract:

Statistics of the Transient Frequency Modulation in the Switch-On of a Single-Mode Semiconductor Laser

BibTeX:

@article{IMEDEA_intranet:16,

  author = {Balle, S. and de Pasquale, F. and Abraham, N.B. and M. San Miguel, M.},

  title = {Statistics of the Transient Frequency Modulation in the Switch-On of a Single-Mode Semiconductor Laser},

  journal = {Physical Review A - Atomic, Molecular, and Optical Physics},

  year = {1992},

  volume = {45},

  pages = {1955--1966},

  url = {http://www.imedea.uib.es/pub_download.php?id=16}

}

Balle, S.; Colet, P. & San Miguel, M. Statistics for the Transient Response of Single-Mode Semiconductor Laser Gain Switching 1991 Physical Review A - Atomic, Molecular, and Optical Physics
Vol. 43, pp. 498-506 
article DOI URL 
Abstract:

BibTeX:

@article{IMEDEA_intranet:17,

  author = {Balle, S. and Colet, P. and San Miguel, M.},

  title = {Statistics for the Transient Response of Single-Mode Semiconductor Laser Gain Switching},

  journal = {Physical Review A - Atomic, Molecular, and Optical Physics},

  year = {1991},

  volume = {43},

  pages = {498--506},

  url = {http://www.imedea.uib.es/pub_download.php?id=17},

  doi = {http://dx.doi.org/10.1103/PhysRevA.43.498}

}

Balle, S.; San Miguel, M. & De Pasquale, F. Statistics for the Switch-On of a Laser with Injected Signal 1991 Procedings
Vol. 7, pp. 449-451 
inproceedings URL 
Abstract:

Statistics for the Switch-On of a Laser with Injected Signal

BibTeX:

@inproceedings{IMEDEA_intranet:18,

  author = {Balle, S. and San Miguel, M. and De Pasquale, F.},

  title = {Statistics for the Switch-On of a Laser with Injected Signal},

  journal = {Procedings},

  year = {1991},

  volume = {7},

  pages = {449--451},

  url = {http://www.imedea.uib.es/pub_download.php?id=18}

}

García, P.; S. Balle, S. & Bermejo, F. J. Output Properties of Nondegenerate Parametric Amplifiers with Nonhomogeneous Absorption Losses 1991 Journal of Modern Optics
Vol. 38, pp. 2349 
article URL 
Abstract:

The noise properties of non-degenerate parametric amplifiers with
absorption losses which are different for the two beams are analysed by means of a
semiclassical approach which enables the direct derivation of the Langevin
equations for the optical fields from the quantum Heisenberg equations . Several
statistical quantities are calculated and the implications of the present results for
sub shot-noise absorption measurements are discussed finally .

BibTeX:

@article{IMEDEA_intranet:206,

  author = {García, P. and S. Balle, S. and Bermejo, F. J.},

  title = {Output Properties of Nondegenerate Parametric Amplifiers with Nonhomogeneous Absorption Losses},

  journal = {Journal of Modern Optics},

  year = {1991},

  volume = {38},

  pages = {2349},

  url = {http://www.imedea.uib.es/pub_download.php?id=206}

}

Balle, S.; San Miguel, M.; De Pasquale, F. & Abraham, N. B. Intensity Statistics and Spatial Correlation Functions in a Noise Driven Unidirectional Laser Amplifier 1991 Optics Communications
Vol. 85, pp. 104-116 
article URL 
Abstract:

Intensity Statistics and Spatial Correlation Functions in a Noise Driven Unidirectional Laser Amplifier

BibTeX:

@article{IMEDEA_intranet:56,

  author = {Balle, S. and San Miguel, M. and De Pasquale, F. and Abraham, N. B.},

  title = {Intensity Statistics and Spatial Correlation Functions in a Noise Driven Unidirectional Laser Amplifier},

  journal = {Optics Communications},

  year = {1991},

  volume = {85},

  pages = {104--116},

  url = {http://www.imedea.uib.es/pub_download.php?id=56}

}

Balestri, S.; Ciofini, M.; Meucci, R.; Arecchi, F.T.; Colet, P.; San Miguel, M. & Balle, S. CO2 Laser with Swept Pump Parameter. The Nonlinear Regime 1991 Physical Review A - Atomic, Molecular, and Optical Physics
Vol. 44, pp. 5894-5897 
article URL 
Abstract:

Abstract

BibTeX:

@article{IMEDEA_intranet:92,

  author = {Balestri, S. and Ciofini, M. and Meucci, R. and Arecchi, F.T. and Colet, P. and San Miguel, M. and Balle, S.},

  title = {CO2 Laser with Swept Pump Parameter. The Nonlinear Regime},

  journal = {Physical Review A - Atomic, Molecular, and Optical Physics},

  year = {1991},

  volume = {44},

  pages = {5894--5897},

  url = {http://www.imedea.uib.es/pub_download.php?id=92}

}

Abraham, N. B.; S. Balle, S.; Chen, Z.; DAngelo, E. J. & Tredicce, J. R. Defect Dynamics in the Evolution of the Transverse Pattern of a Laser 1991 Proceedings of the SPIE(1840), pp. 156-165  inproceedings URL 
Abstract:

Defect Dynamics in the Evolution of the Transverse Pattern of a Laser

BibTeX:

@inproceedings{IMEDEA_intranet:94,

  author = {Abraham, N. B. and S. Balle, S. and Chen, Z. and DAngelo, E. J. and Tredicce, J. R.},

  title = {Defect Dynamics in the Evolution of the Transverse Pattern of a Laser},

  journal = {Proceedings of the SPIE},

  year = {1991},

  number = {1840},

  pages = {156--165},

  url = {http://www.imedea.uib.es/pub_download.php?id=94}

}

Bermejo, F. J.; García-Fernández, P.; Balle, S.; Colet, P.; Toral, R. & San Miguel, M. Langevin Equations for Squeezing by Means of Nonlinear Optical Devices 1991 Nonlinear Dynamics and Quantum Phenomena in Optical Systems, pp. 65-73  inbook URL 
Abstract: Langevin Equations for Squeezing by Means of Nonlinear Optical Devices
BibTeX:

@inbook{IMEDEA_intranet:95,

  author = {Bermejo, F. J. and García-Fernández, P. and Balle, S. and Colet, P. and Toral, R. and San Miguel, M.},

  title = {Langevin Equations for Squeezing by Means of Nonlinear Optical Devices},

  booktitle = {Nonlinear Dynamics and Quantum Phenomena in Optical Systems},

  publisher = {Springer-Verrlag, R. Vilaseca and R. Corbalán},

  year = {1991},

  pages = {65--73},

  url = {http://www.imedea.uib.es/pub_download.php?id=95}

}

Balle, S.; Colet, P. & San Miguel, M. Relation between Passage Time and Maximum Intensity in Semiconductor Laser Gain Switching 1991 Nonlinear Dynamics and Quantum Phenomena in Optical Systems, pp. 293-297  inbook URL 
Abstract: Relation between Passage Time and Maximum Intensity in Semiconductor Laser Gain Switching
BibTeX:

@inbook{IMEDEA_intranet:98,

  author = {Balle, S. and Colet, P. and San Miguel, M.},

  title = {Relation between Passage Time and Maximum Intensity in Semiconductor Laser Gain Switching},

  booktitle = {Nonlinear Dynamics and Quantum Phenomena in Optical Systems},

  publisher = {Springer-Verlag, R. Vilaseca & R. Corbalán},

  year = {1991},

  pages = {293--297},

  url = {http://www.imedea.uib.es/pub_download.php?id=98}

}

Costa-Quintana, J.; F., Lopez-Aguilar; S., Balle & R., Salvador Quasiparticle band structure for the Hubbard systems: Application to -CeAl2 1990 Physical Review B
Vol. 41(10), pp. 7096-7102 
article DOI URL 
Abstract:

A self-energy formalism for determining the quasiparticle band structure of the Hubbard systems is deduced. The self-energy is obtained from the dynamically screened Coulomb interaction whose bare value is the correlation energy U. A method for integrating the Schrödingerlike equation with the self-energy operator is given. The method is applied to the cubic Laves phase of -CeAl2 because it is a clear Hubbard system with a very complex electronic structure and, moreover, this system provides us with sufficient experimental data for testing our method. © 1990 The American Physical Society.

BibTeX:

@article{IMEDEA_intranet:218,

  author = {Costa-Quintana, J. and Lopez-Aguilar F. and Balle S. and Salvador R.},

  title = {Quasiparticle band structure for the Hubbard systems: Application to -CeAl2},

  journal = {Physical Review B},

  year = {1990},

  volume = {41},

  number = {10},

  pages = {7096--7102},

  url = {http://www.imedea.uib.es/pub_download.php?id=218},

  doi = {http://dx.doi.org/10.1103/PhysRevB.41.7096}

}

Hu, B.; Valinia, A. & Piro, O. Universality and Asymptotic Limits of the Scaling Exponents in Circle Maps 1990 invalid journal
Vol. 144, pp. 7 
article URL 
Abstract: Universality and Asymptotic Limits of the Scaling Exponents in Circle Maps
BibTeX:

@article{IMEDEA_intranet:220,

  author = {Hu, B. and Valinia, A. and Piro, O.},

  title = {Universality and Asymptotic Limits of the Scaling Exponents in Circle Maps},

  journal = {invalid journal},

  year = {1990},

  volume = {144},

  pages = {7},

  url = {http://www.imedea.uib.es/pub_download.php?id=220}

}

Feingold, M.; Littlejohn, R. G.; Pehling, J. S.; Piro, O. & Solina, S. B. Scars in Billiards: The Phase Space Approach 1990 invalid journal
Vol. 146, pp. 199 
article URL 
Abstract: Scars in Billiards: The Phase Space Approach
BibTeX:

@article{IMEDEA_intranet:221,

  author = {Feingold, M. and Littlejohn, R. G. and Pehling, J. S. and Piro, O. and Solina, S. B.},

  title = {Scars in Billiards: The Phase Space Approach},

  journal = {invalid journal},

  year = {1990},

  volume = {146},

  pages = {199},

  url = {http://www.imedea.uib.es/pub_download.php?id=221}

}

Feingold, M.; González, D. L.; Magnasco, M. O. & Piro, O. On the Universality Class Dependence of Period Doubling Indices 1990 invalid journal
Vol. 156, pp. 272 
article URL 
Abstract: On the Universality Class Dependence of Period Doubling Indices
BibTeX:

@article{IMEDEA_intranet:222,

  author = {Feingold, M. and González, D. L. and Magnasco, M. O. and Piro, O.},

  title = {On the Universality Class Dependence of Period Doubling Indices},

  journal = {invalid journal},

  year = {1990},

  volume = {156},

  pages = {272},

  url = {http://www.imedea.uib.es/pub_download.php?id=222}

}

Balle, S.; F., De Pasquale & San Miguel, M. Passage Time Calculation for the Detection of Weak Signals via the Transient Dynamics of a Laser 1990 Physical Review A - Atomic, Molecular, and Optical Physics
Vol. 41, pp. 5012-5015 
article URL 
Abstract:

Passage Time Calculation for the Detection of Weak Signals via the Transient Dynamics of a Laser

BibTeX:

@article{IMEDEA_intranet:39,

  author = {Balle, S. and De Pasquale F. and San Miguel, M.},

  title = {Passage Time Calculation for the Detection of Weak Signals via the Transient Dynamics of a Laser},

  journal = {Physical Review A - Atomic, Molecular, and Optical Physics},

  year = {1990},

  volume = {41},

  pages = {5012--5015},

  url = {http://www.imedea.uib.es/pub_download.php?id=39}

}

López-Aguilar, F.; Balle, S. & Costa-Quintana, J. Quasiparticle States in f-electron Compounds from the Multiband Hubbard Model 1989 Physical Review B
Vol. 39, pp. 9591 
article URL 
Abstract:

Quasiparticle States in f-electron Compounds from the Multiband Hubbard Model

BibTeX:

@article{IMEDEA_intranet:241,

  author = {López-Aguilar, F. and Balle, S. and Costa-Quintana, J.},

  title = {Quasiparticle States in f-electron Compounds from the Multiband Hubbard Model},

  journal = {Physical Review B},

  year = {1989},

  volume = {39},

  pages = {9591},

  url = {http://www.imedea.uib.es/pub_download.php?id=241}

}

Costa-Quintana, J.; López-Aguilar, F.; Balle, S. & Salvador, R. Electronic Structure of YBa2Cu3O7-d Including Strong Correlation Effects 1989 Physical Review B
Vol. 39, pp. 9675 
article URL 
Abstract:

Electronic Structure of YBa2Cu3O7-d Including Strong Correlation Effects

BibTeX:

@article{IMEDEA_intranet:242,

  author = {Costa-Quintana, J. and López-Aguilar, F. and Balle, S. and Salvador, R.},

  title = {Electronic Structure of YBa2Cu3O7-d Including Strong Correlation Effects},

  journal = {Physical Review B},

  year = {1989},

  volume = {39},

  pages = {9675},

  url = {http://www.imedea.uib.es/pub_download.php?id=242}

}

López-Aguilar, F.; Costa-Quintana, J. & Balle, S. Hubbard Systems with Two Channels for the Localisation 1989 Physica Status Solidi (B): Basic Research
Vol. 152, pp. 543 
article URL 
Abstract: Hubbard Systems with Two Channels for the Localisation
BibTeX:

@article{IMEDEA_intranet:243,

  author = {López-Aguilar, F. and Costa-Quintana, J. and Balle, S.},

  title = {Hubbard Systems with Two Channels for the Localisation},

  journal = {Physica Status Solidi (B): Basic Research},

  year = {1989},

  volume = {152},

  pages = {543},

  url = {http://www.imedea.uib.es/pub_download.php?id=243}

}

Feingold, M.; Kadanoff, L. P. & Piro, O. Transport of Passive Scalars: KAM Surfaces and Difussion in Three Dimensional Liouvillean Maps 1989 invalid journal  article URL 
BibTeX:

@article{IMEDEA_intranet:245,

  author = {Feingold, M. and Kadanoff, L. P. and Piro, O.},

  title = {Transport of Passive Scalars: KAM Surfaces and Difussion in Three Dimensional Liouvillean Maps},

  journal = {invalid journal},

  year = {1989},

  url = {http://www.imedea.uib.es/pub_download.php?id=245}

}

Campbell, A.; González, A.; González, D. L.; Piro, O. & Larrondo, H. A. Isochrones and the Dynamics of Kicked Oscillators 1989 Physica A
Vol. 155, pp. 565 
article URL 
Abstract: Isochrones and the Dynamics of Kicked Oscillators
BibTeX:

@article{IMEDEA_intranet:246,

  author = {Campbell, A. and González, A. and González, D. L. and Piro, O. and Larrondo, H. A.},

  title = {Isochrones and the Dynamics of Kicked Oscillators},

  journal = {Physica A},

  year = {1989},

  volume = {155},

  pages = {565},

  url = {http://www.imedea.uib.es/pub_download.php?id=246}

}

González, D. L.; Piro, O.; Savino, G. & Valentinuzi, J. Evidences of Chaotic Dynamics in Driven Toad Ventricles 1989 invalid journal
Vol. 56, pp. 273 
article URL 
Abstract: Evidences of Chaotic Dynamics in Driven Toad Ventricles
BibTeX:

@article{IMEDEA_intranet:247,

  author = {González, D. L. and Piro, O. and Savino, G. and Valentinuzi, J.},

  title = {Evidences of Chaotic Dynamics in Driven Toad Ventricles},

  journal = {invalid journal},

  year = {1989},

  volume = {56},

  pages = {273},

  url = {http://www.imedea.uib.es/pub_download.php?id=247}

}

Feingold, M.; Leitner, D. & Piro, O. Semiclassical Structure of Hamiltonians and Localization 1989 invalid journal
Vol. 144, pp. 7 
article URL 
Abstract: Semiclassical Structure of Hamiltonians and Localization
BibTeX:

@article{IMEDEA_intranet:248,

  author = {Feingold, M. and Leitner, D. and Piro, O.},

  title = {Semiclassical Structure of Hamiltonians and Localization},

  journal = {invalid journal},

  year = {1989},

  volume = {144},

  pages = {7},

  url = {http://www.imedea.uib.es/pub_download.php?id=248}

}

Costa-Quintana, J.; López-Aguilar, F.; Balle, S.; Mu noz, J. S. & Sánchez, A. Coulomb Correlation Effects in YCuOBa Systems 1989 Physica C
Vol. 162-164, pp. 757 
article URL 
Abstract: Coulomb Correlation Effects in YCuOBa Systems
BibTeX:

@article{IMEDEA_intranet:249,

  author = {Costa-Quintana, J. and López-Aguilar, F. and Balle, S. and Muñoz, J. S. and Sánchez, A.},

  title = {Coulomb Correlation Effects in YCuOBa Systems},

  journal = {Physica C},

  year = {1989},

  volume = {162-164},

  pages = {757},

  url = {http://www.imedea.uib.es/pub_download.php?id=249}

}

López-Aguilar, F.; Costa-Quintana, J.; Balle, S.; Aurell, M. T.; Sánchez, A. & Mu noz, J. S. Dielectric Response in high-Tc Superconductors 1989 Physica C
Vol. 162-164, pp. 759 
article URL 
Abstract: Dielectric Response in high-Tc Superconductors
BibTeX:

@article{IMEDEA_intranet:250,

  author = {López-Aguilar, F. and Costa-Quintana, J. and Balle, S. and Aurell, M. T. and Sánchez, A. and Muñoz, J. S.},

  title = {Dielectric Response in high-Tc Superconductors},

  journal = {Physica C},

  year = {1989},

  volume = {162-164},

  pages = {759},

  url = {http://www.imedea.uib.es/pub_download.php?id=250}

}

Balle, S.; Costa-Quintana, J. & F., López-Aguilar. Method for analyzing the ground state of intermediate-valence systems: Application to metallic SmS 1988 Physical Review B
Vol. 37, pp. 6615-6621 
article URL 
Abstract:

Method for analyzing the ground state of intermediate-valence systems: Application to metallic SmS

BibTeX:

@article{IMEDEA_intranet:10014,

  author = {Balle, S. and Costa-Quintana, J. and López-Aguilar. F.},

  title = {Method for analyzing the ground state of intermediate-valence systems: Application to metallic SmS},

  journal = {Physical Review B},

  year = {1988},

  volume = {37},

  pages = {6615--6621},

  url = {http://www.imedea.uib.es/pub_download.php?id=10014}

}

López-Aguilar, F.; Balle, S. & Costa-Quintana, J. Realistic treatment of the self-energy formalism in heavy-fermion metals: Application to superconducting phases of CeRu_2 and CeOs_2 1988 Physical Review B
Vol. 38, pp. 163-169 
article URL 
Abstract:

Realistic treatment of the self-energy formalism in heavy-fermion metals: Application to superconducting phases of CeRu_2 and CeOs_2

BibTeX:

@article{IMEDEA_intranet:10015,

  author = {F. López-Aguilar and S. Balle and J. Costa-Quintana},

  title = {Realistic treatment of the self-energy formalism in heavy-fermion metals: Application to superconducting phases of CeRu_2 and CeOs_2},

  journal = {Physical Review B},

  year = {1988},

  volume = {38},

  pages = {163--169},

  url = {http://www.imedea.uib.es/pub_download.php?id=10015}

}

Balle, S.; López-Aguilar, F. & Costa-Quintana, J. Electronic structure of the superconducting phase of CeOs_x Ru_2-x 1988 Physica C
Vol. 153-155, pp. 1245-1246 
article URL 
Abstract: Electronic structure of the superconducting phase of CeOs_x Ru_2-x
BibTeX:

@article{IMEDEA_intranet:10016,

  author = {S. Balle and F. López-Aguilar and J. Costa-Quintana},

  title = {Electronic structure of the superconducting phase of CeOs_x Ru_2-x},

  journal = {Physica C},

  year = {1988},

  volume = {153-155},

  pages = {1245--1246},

  url = {http://www.imedea.uib.es/pub_download.php?id=10016}

}

López-Aguilar, F.; Balle, S. & Costa-Quintana, J. Dynamic potentials for unstable narrow band systems 1988 Physica Status Solidi (B): Basic Research
Vol. 149, pp. 585-593 
article URL 
Abstract:

Dynamic potentials for unstable narrow band systems

BibTeX:

@article{IMEDEA_intranet:10017,

  author = {F. López-Aguilar and S. Balle and J. Costa-Quintana},

  title = {Dynamic potentials for unstable narrow band systems},

  journal = {Physica Status Solidi (B): Basic Research},

  year = {1988},

  volume = {149},

  pages = {585--593},

  url = {http://www.imedea.uib.es/pub_download.php?id=10017}

}

Balle, S.; F., Lopez-Aguilar & J., Costa-Quintana Electronic structure of ReBaCuO systems 1988 Journal of Magnetism and Magnetic Materials
Vol. 76(C), pp. 579-581 
article URL 
Abstract: The band structure of the CuO superconducting systems has been determined from a nonlocal band Hamiltonian. We have performed two calculations with Ud = 0 and Ud = 4 eV and compare both results with the available experimental results of the direct and inverse photoemission. © 1988.
BibTeX:

@article{IMEDEA_intranet:10018,

  author = {Balle, S. and Lopez-Aguilar F. and Costa-Quintana J.},

  title = {Electronic structure of ReBaCuO systems},

  journal = {Journal of Magnetism and Magnetic Materials},

  year = {1988},

  volume = {76},

  number = {C},

  pages = {579--581},

  url = {http://www.imedea.uib.es/pub_download.php?id=10018}

}

Balle, S.; Lopez-Aguilar, F. & Costa-Quintana, J. f-f and f-d pseudopotential model applied to the band structures of Ce-systems 1987 Journal of Magnetism and Magnetic Materials
Vol. 63(C), pp. 652-654 
article URL 
Abstract:

In this paper we introduce a pseudopotential model which includes the f-f and f-d Coulomb effects along with f-d hybridisation into the electronic structure of the Ce-systems. © 1987.

BibTeX:

@article{IMEDEA_intranet:10012,

  author = {Balle, S. and Lopez-Aguilar, F. and Costa-Quintana, J.},

  title = {f-f and f-d pseudopotential model applied to the band structures of Ce-systems},

  journal = {Journal of Magnetism and Magnetic Materials},

  year = {1987},

  volume = {63},

  number = {C},

  pages = {652--654},

  url = {http://www.imedea.uib.es/pub_download.php?id=10012}

}

S., Balle; J., Costa-Quintana & F., Lopez-Aguilar f STRUCTURES IN THE NON-MAGNETIC PHASE OF CeOs//2. 1987 Journal of Physics C-Solid State Physics
Vol. 20(13), pp. l223-l228 
article URL 
Abstract: The density of states and the band structure of the cubic phase of non-magnetic CeOs//2 is determined. The splitting between the different 4f structures is analyzed and the experimental results related to the large peaks that appear in the DOS at the Fermi level are interpreted.
BibTeX:

@article{IMEDEA_intranet:10013,

  author = {Balle S. and Costa-Quintana J. and Lopez-Aguilar F.},

  title = {f STRUCTURES IN THE NON-MAGNETIC PHASE OF CeOs//2.},

  journal = {Journal of Physics C-Solid State Physics},

  year = {1987},

  volume = {20},

  number = {13},

  pages = {l223--l228},

  url = {http://www.imedea.uib.es/pub_download.php?id=10013}

}

A. Scire, J. Mulet, C. Mirasso J. Danckaert & Miguel, M. San Vectorial chaos synchronization and polarization message encoding in vertical-cavity surface-emitting lasers 1985 Physical Review Letters
Vol. 90, pp. 113901 
article URL 
BibTeX:

@article{IMEDEA_intranet:998,

  author = {A. Scire, J. Mulet, C. Mirasso, J. Danckaert and M. San Miguel},

  title = {Vectorial chaos synchronization and polarization message encoding in vertical-cavity surface-emitting lasers},

  journal = {Physical Review Letters},

  year = {1985},

  volume = {90},

  pages = {113901},

  url = {http://www.imedea.uib.es/pub_download.php?id=998}

}

Matching entries: 0
settings...
AuthorTitleYearJournal/ProceedingsReftypeLink
Perez-Serrano, A.; Javaloyes, J. & Balle, S. Wavelength multistability in ring and fabry-Perot lasers: The effect of spatial hole burning 2011 Lasers and Electro-Optics Europe (CLEO EUROPE/EQEC), 2011 Conference on and 12th European Quantum Electronics Conference, pp. 1  inproceedings DOI  
Abstract: In this contribution, we investigate theoretically the multistability by means of a travelling wave model (TWM) for a homogeneously broadened medium with the appropriate boundary conditions, that allow us to model RLs and FP lasers. We take into account that the presence of counter-propagating fields creates a spatial modulation or grating of the population inversion (D2). We compute the monochromatic steady state solutions of the system via a shooting method and we numerically perform their linear stability analysis by diagonalising the jacobian obtained from the evolution operator of the discretized system.
BibTeX:

@inproceedings{5942552,

  author = {Perez-Serrano, A. and Javaloyes, J. and Balle, S.},

  title = {Wavelength multistability in ring and fabry-Perot lasers: The effect of spatial hole burning},

  booktitle = {Lasers and Electro-Optics Europe (CLEO EUROPE/EQEC), 2011 Conference on and 12th European Quantum Electronics Conference},

  year = {2011},

  pages = {1},

  doi = {http://dx.doi.org/10.1109/CLEOE.2011.5942552}

}

Prrez-Serrano, A.; Javaloyes, J. & Balle, S. Bichromatic emission and coexisting multimode dynamics in Ring Lasers 2011 Lasers and Electro-Optics Europe (CLEO EUROPE/EQEC), 2011 Conference on and 12th European Quantum Electronics Conference, pp. 1  inproceedings DOI  
Abstract: In this contribution, a novel dynamical regimes where the emission in each direction is almost single-mode, but each direction lases at a different wavelength. This regime might have practical relevance in the development of gyroscopes, since the two directions are not phase-locked. This emission state may coexist with states of mode-locked unidirectional emission for large gain bandwidth and relatively small detuning . These mode-locked states arise via a Risken Nummedal instability without the need of intracavity saturable absorbers.
BibTeX:

@inproceedings{5942555,

  author = {Prrez-Serrano, A. and Javaloyes, J. and Balle, S.},

  title = {Bichromatic emission and coexisting multimode dynamics in Ring Lasers},

  booktitle = {Lasers and Electro-Optics Europe (CLEO EUROPE/EQEC), 2011 Conference on and 12th European Quantum Electronics Conference},

  year = {2011},

  pages = {1},

  doi = {http://dx.doi.org/10.1109/CLEOE.2011.5942555}

}

Marconi, M.; Giudici, M.; Barland, S.; Javaloyes, J. & Balle, S. Polarization dynamics of VCSELs with optical feedback and XPR 2011 Lasers and Electro-Optics Europe (CLEO EUROPE/EQEC), 2011 Conference on and 12th European Quantum Electronics Conference, pp. 1  inproceedings DOI  
Abstract: Vertical Cavity Surface-Emitting Laser (VCSEL) may exhibit bistability between two orthogonal polarization emissions (Balle et al., 1999). Hysteresis has been reported in a narrow range of pumping current (Giacomelli et al., 1998). In this contribution we consider a VCSEL with negligible dichroism, where bistability is extended to the whole range of biasing current, from threshold to absolute maximum biasing rate.
BibTeX:

@inproceedings{5942567,

  author = {Marconi, M. and Giudici, M. and Barland, S. and Javaloyes, J. and Balle, S.},

  title = {Polarization dynamics of VCSELs with optical feedback and XPR},

  booktitle = {Lasers and Electro-Optics Europe (CLEO EUROPE/EQEC), 2011 Conference on and 12th European Quantum Electronics Conference},

  year = {2011},

  pages = {1},

  doi = {http://dx.doi.org/10.1109/CLEOE.2011.5942567}

}

Javaloyes, J.; Stolarz, P.; Hou, L.; Sorel, M.; Bryce, A.C. & Balle, S. Passive mode-locking in quantum well Fabry-Perot lasers 2011 Lasers and Electro-Optics Europe (CLEO EUROPE/EQEC), 2011 Conference on and 12th European Quantum Electronics Conference, pp. 1  inproceedings DOI  
Abstract: We develop a detailed theoretical description of passively mode-locked semiconductor lasers based on saturable absorber and compare it with experimental results. Our approach is based on a coarse grained Traveling Wave Model approach and a recently developed analytical time-domain susceptibility of semiconductor quantum wells, Under the approximation of intraband quasi-equilibrium, our model accounts for the dispersion of gain, absorption and refractive index and self-phase modulation. This description is to our knowledge the first time domain model of semiconductor media that does not rely upon the integration of semiconductor Bloch equations.
BibTeX:

@inproceedings{5942605,

  author = {Javaloyes, J. and Stolarz, P. and Hou, L. and Sorel, M. and Bryce, A.C. and Balle, S.},

  title = {Passive mode-locking in quantum well Fabry-Perot lasers},

  booktitle = {Lasers and Electro-Optics Europe (CLEO EUROPE/EQEC), 2011 Conference on and 12th European Quantum Electronics Conference},

  year = {2011},

  pages = {1},

  doi = {http://dx.doi.org/10.1109/CLEOE.2011.5942605}

}

Romeira, B.; Seunarine, K.; Ironside, C.N.; Javaloyes, J.; Kelly, A.E. & Figueiredo, J.M.L. A Liénard optoelectronic oscillator with time-delayed feedback 2011 Lasers and Electro-Optics Europe (CLEO EUROPE/EQEC), 2011 Conference on and 12th European Quantum Electronics Conference, pp. 1  inproceedings DOI  
Abstract: Optoelectronic oscillators (OEO) combine electronic and photonic components to generate spectrally pure microwave signals in both optical and electrical domains. Since the first OEO was reported, several low-cost configurations have been proposed, Here we present a novel OEO configuration based on the integration of a resonant tunneling diode (RTD) photo-detector oscillator and a laser diode. We also show the OEO dynamics is well described as a Lienard oscillator. RTD-based devices work as voltage controlled oscillators taking advantage of RTD negative differential resistance (NDR) current-voltage (I-V) curve. The NDR extends over a wide bandwidth providing gain to the circuit allowing the implementation of compact high speed OEOs with improved performance and useful for optical communication and interconnection applications.
BibTeX:

@inproceedings{5942988,

  author = {Romeira, B. and Seunarine, K. and Ironside, C.N. and Javaloyes, J. and Kelly, A.E. and Figueiredo, J.M.L.},

  title = {A Liénard optoelectronic oscillator with time-delayed feedback},

  booktitle = {Lasers and Electro-Optics Europe (CLEO EUROPE/EQEC), 2011 Conference on and 12th European Quantum Electronics Conference},

  year = {2011},

  pages = {1},

  doi = {http://dx.doi.org/10.1109/CLEOE.2011.5942988}

}

Romeira, B.; Figueiredo, J.M.L.; Ironside, C.N.; Seunarine, K. & Javaloyes, J. Nonlinear dynamics of a Liénard delayed-feedback optoelectronic oscillator 2011 Nonlinear Dynamics and Synchronization (INDS) 16th Int'l Symposium on Theoretical Electrical Engineering (ISTET), 2011 Joint 3rd Int'l Workshop on, pp. 1 -5  inproceedings DOI  
Abstract: We present an optoelectronic oscillator (OEO) that is capable of generating complex and rich dynamics including stable periodic oscillations and broadband chaos. The OEO under analysis here is based on a resonant tunneling diode (RTD) oscillator driving a laser diode and a time-delayed feedback loop. The RTD based OEO is well described as a a Lienard oscillator with delayed-feedback. When subjected to external perturbation, the RTD-OEO generates periodic and chaotic states that are controlled by the delayed-feedback loop characteristics. The implemented numerical Lienard optoelectronic oscillator provides a simple way to study time-delayed dynamical systems containing negative resistance oscillators.
BibTeX:

@inproceedings{6024825,

  author = {Romeira, B. and Figueiredo, J.M.L. and Ironside, C.N. and Seunarine, K. and Javaloyes, J.},

  title = {Nonlinear dynamics of a Liénard delayed-feedback optoelectronic oscillator},

  booktitle = {Nonlinear Dynamics and Synchronization (INDS) 16th Int'l Symposium on Theoretical Electrical Engineering (ISTET), 2011 Joint 3rd Int'l Workshop on},

  year = {2011},

  pages = {1 -5},

  doi = {http://dx.doi.org/10.1109/INDS.2011.6024825}

}

Javaloyes, J.; Perez-Serrano, A. & Balle, S. Bifurcation analysis of traveling wave models 2011 Numerical Simulation of Optoelectronic Devices (NUSOD), 2011 11th International Conference on, pp. 145 -146  inproceedings DOI  
Abstract: We present a general method allowing to perform a direct bifurcation diagram and to determine the stability of the solutions of a Traveling wave model. We exemplify the cases of the two level atom and the semiconductor quantum well lasers.
BibTeX:

@inproceedings{6041184,

  author = {Javaloyes, J. and Perez-Serrano, A. and Balle, S.},

  title = {Bifurcation analysis of traveling wave models},

  booktitle = {Numerical Simulation of Optoelectronic Devices (NUSOD), 2011 11th International Conference on},

  year = {2011},

  pages = {145 -146},

  doi = {http://dx.doi.org/10.1109/NUSOD.2011.6041184}

}

Pérez-Serrano, A.; Javaloyes, J & Balle, S Longitudinal mode multistability in Ring and Fabry-Perot lasers: The effect of spatial hole burning 2011 Optics Express
Vol. 19(4), pp. 3284-3289 
article URL 
Abstract:

We theoretically discuss the impact of the cavity configuration
on the possible longitudinal mode multistability in homogeneously broadened lasers. Our analysis is based on the most general form of a Travelling-Wave Model for which we present a method that allows us to evaluate the monochromatic solutions as well as their eigenvalue spectrum. We find that multistability is more easily reached in Ring cavities as compared to Fabry-Pérot cavities, in agreement with recent experimental reports, which we explain by the different amounts of Spatial-Hole Burning in each configuration.

BibTeX:

@article{IMEDEA_intranet:10301,

  author = {Pérez-Serrano, A. and Javaloyes, J and Balle, S},

  title = {Longitudinal mode multistability in Ring and Fabry-Perot lasers: The effect of spatial hole burning},

  journal = {Optics Express},

  year = {2011},

  volume = {19},

  number = {4},

  pages = {3284--3289},

  url = {http://www.imedea.uib.es/pub_download.php?id=10301}

}

M., Palmer; Balle, S.; March, D.; Alós, J. & Linde, M. Estimating the size of circular home range from fish Mark-Release-(single)-Recapture data: the case of a small labrid targeted by recreational fishing 2011 Marine Ecology - Progress Series
Vol. 430, pp. 87-97 
article DOI URL 
Abstract:

 

Contrary to common belief, empirical evidence shows that a number of marine littoral fish species tend to remain in a small geographic area. Despite the growing awareness about the consequences of reduced mobility (ex., design of marine protected areas), an accurate description of fish movement is technically difficult; thus, it is usually not considered. Mark-Release-(single)-Recapture (MRsR) data obtained from externally tagged fish that are returned by fishermen or recreational fishers are potentially useful for describing fish movement. This study is a methodological contribution aimed at demonstrating a simple analytic strategy for estimating the size of the circular home range (i.e., the area where a fish spends most of the time) from MRsR data. This analytic strategy is not adequate for pelagic or large predators moving at the oceanic scale but could be suitable for some reef and littoral fish. The estimates obtained by this method are robust even if (i) the number of recaptured fish is small, (ii) fishing effort or habitat suitability displays some spatial variability and (iii) fish display some intra-specific variability. Based on only 32 recaptures, our data demonstrate that Coris julis (a small labrid targeted by recreational fishers) is more sedentary than previously assumed; this fish spends 95% of its time within an area 227 m in radius (Bayesian 95% credibility interval: 192 to 275 m). 

 

BibTeX:

@article{IMEDEA_intranet:10341,

  author = {Palmer M. and Balle, S. and March, D. and Alós, J. and Linde, M.},

  title = {Estimating the size of circular home range from fish Mark-Release-(single)-Recapture data: the case of a small labrid targeted by recreational fishing},

  journal = {Marine Ecology - Progress Series},

  year = {2011},

  volume = {430},

  pages = {87--97},

  url = {http://www.imedea.uib.es/pub_download.php?id=10341},

  doi = {http://dx.doi.org/10.3354/meps09109}

}

Javaloyes, J & Balle, S All-Optical Directional Switching of Bistable Semiconductor Ring Lasers 2011 IEEE Journal of Quantum Electronics
Vol. 47(8), pp. 1078-1085 
article DOI URL 
Abstract:

All-optical directional switching of bistable semiconductor
ring lasers is studied by numerical simulations of a
traveling-wave model. We discuss how the reversal depends on
the bias current applied to the laser as well as on the energy,
duration, and wavelength of the trigger pulses. For pulse durations
longer than the cavity roundtrip time, the reversal occurs
smoothly with a transient that exhibits relaxation oscillations,
otherwise, the transient is composed of large long-lived spikes
that reveal its multimode character. In the former case, the
switching speed can be defined like in electronics systems, but
not in the latter, which requires an operational definition of
the maximum speed based on, e.g., bit-error rate measurements.
Our model includes the light extraction sections present in real
devices, which allows us to discuss the experimental problems
posed by the differences existing between intracavity fields and
output fields.

BibTeX:

@article{IMEDEA_intranet:10460,

  author = {Javaloyes, J and Balle, S},

  title = {All-Optical Directional Switching of Bistable Semiconductor Ring Lasers},

  journal = {IEEE Journal of Quantum Electronics},

  year = {2011},

  volume = {47},

  number = {8},

  pages = {1078--1085},

  url = {http://www.imedea.uib.es/pub_download.php?id=10460},

  doi = {http://dx.doi.org/10.1109/JQE.2011.2152368}

}

Stolarz, P. M.; Javaloyes, J.; Mezösi, G.; Hou, L.; Ironside, C. N.; Sorel, M.; Bryce, A. C. & Balle, S. Spectral Dynamical Behavior in Passively Mode-Locked Semiconductor Lasers 2011 IEEE Photonics Journal
Vol. 3(6), pp. 1067-1082 
article URL 
Abstract:

In this paper, we present an experimental and theoretical study of passive modelocking in semiconductor Fabry–Pérot, quantum-well, lasers operating at around 1550 nm and producing picosecond pulses at a repetition frequency of 40 GHz. The different regimes that occur as the reverse bias voltage applied to the saturable absorber (SA) section or the
bias current injected into the amplifier section are characterized both in the time and frequency/wavelength domains. Our results reveal that the lasers display spectral competition between the gain of the amplifier section and the absorption of the SA, with variations of the lasing wavelength up to 25 nm as the bias conditions are changed. These wavelength variations result from the thermal drift of the SA band-edge due to Joule heating by the generated photocurrent and from the competition between two possible lasing regions placed either at the amplifier gain peak or near the band-edge of the SA. The experimental observations are satisfactorily reproduced and explained in the framework of a Traveling Wave Model complemented by a time-domain description of the semiconductor susceptibility.

BibTeX:

@article{IMEDEA_intranet:10498,

  author = {P. M. Stolarz and J. Javaloyes and G. Mezösi and L. Hou and C. N. Ironside and M. Sorel and A. C. Bryce and S. Balle},

  title = {Spectral Dynamical Behavior in Passively Mode-Locked Semiconductor Lasers},

  journal = {IEEE Photonics Journal},

  year = {2011},

  volume = {3},

  number = {6},

  pages = {1067--1082},

  url = {http://www.imedea.uib.es/pub_download.php?id=10498}

}

Serrano, Antonio Pérez Modeling semiconductor ring lasers 2011 School: Universitat Illes Balears  phdthesis URL 
BibTeX:

@phdthesis{IMEDEA_intranet:10499,

  author = {Antonio Pérez Serrano},

  title = {Modeling semiconductor ring lasers},

  school = {Universitat Illes Balears},

  year = {2011},

  url = {http://www.imedea.uib.es/pub_download.php?id=10499}

}

Javaloyes, J & Balle, S Anticolliding design for monolithic passively mode-locked semiconductor lasers 2011 Optics Letters
Vol. 36(22), pp. 4407-4409 
article DOI URL 
Abstract:

The performance of two-section, passively mode-locked semiconductor lasers is theoretically analyzed for different cavity designs. Placing the saturable absorber section close to an antireflection-coated facet leads to a substantial increase in output power and a reduction in amplitude and timing jitter. Moreover, it broadens the bias current region of stable passive mode-locking operation.

BibTeX:

@article{IMEDEA_intranet:10500,

  author = {Javaloyes, J and Balle, S},

  title = {Anticolliding design for monolithic passively mode-locked semiconductor lasers},

  journal = {Optics Letters},

  year = {2011},

  volume = {36},

  number = {22},

  pages = {4407--4409},

  url = {http://www.imedea.uib.es/pub_download.php?id=10500},

  doi = {http://dx.doi.org/10.1364/OL.36.004407}

}

Orfila, A; Balle, S & Simarro, G Constructive interferences as a seiche generation mechanism 2011 Scientia Marina
Vol. 75(3), pp. 595-603 
article DOI URL 
Abstract:

Constructive interferences as a seiche generation mechanism

BibTeX:

@article{IMEDEA_intranet:10578,

  author = {Orfila, A and Balle, S and Simarro, G},

  title = {Constructive interferences as a seiche generation mechanism},

  journal = {Scientia Marina},

  year = {2011},

  volume = {75},

  number = {3},

  pages = {595--603},

  url = {http://www.imedea.uib.es/pub_download.php?id=10578},

  doi = {http://dx.doi.org/10.3989/scimar.2011.75n3595}

}

Hou, Lianping; Stolarz, P.; Dylewicz, R.; Haji, M.; Javaloyes, J.; Qiu, B. & Bryce, A.C. 160-GHz Passively Mode-Locked AlGaInAs 1.55- mu m Strained Quantum-Well Compound Cavity Laser 2010 Photonics Technology Letters, IEEE
Vol. 22(10), pp. 727 -729 
article DOI  
Abstract: The first demonstration of harmonic mode-locked operation from a monolithic semiconductor laser comprising a compound cavity formed by twin deeply etched intracavity reflectors based on 1.55- mu m AlGaInAs strained quantum-well material is presented. Nearly transform-limited Gaussian pulses are generated at 160-GHz repetition rate with a 1.67-ps pulse duration.
BibTeX:

@article{5432958,

  author = {Lianping Hou and Stolarz, P. and Dylewicz, R. and Haji, M. and Javaloyes, J. and Qiu, B. and Bryce, A.C.},

  title = {160-GHz Passively Mode-Locked AlGaInAs 1.55- mu m Strained Quantum-Well Compound Cavity Laser},

  journal = {Photonics Technology Letters, IEEE},

  year = {2010},

  volume = {22},

  number = {10},

  pages = {727 -729},

  doi = {http://dx.doi.org/10.1109/LPT.2010.2045228}

}

Javaloyes, J. & Balle, S. Mode-Locking in Semiconductor Fabry-Perot Lasers 2010 Quantum Electronics, IEEE Journal of
Vol. 46(7), pp. 1023 -1030 
article DOI  
Abstract: We theoretically study the dynamics and the mode-locking properties of semiconductor Fabry-Perot lasers with intracavity saturable absorber by using a travelling-wave model and a time-domain description of the optical response of the semiconductor materials. Our description enables us to incorporate important features as for instance the abrupt spectral variations of the absorption in the saturable absorber. We analyze the influence of several key parameters that affect the stability of the mode-locking regime and show that this modelling approach can be used, upon proper fitting of the material parameters, for optimization of the design of semiconductor mode-locked lasers.
BibTeX:

@article{5440029,

  author = {Javaloyes, J. and Balle, S.},

  title = {Mode-Locking in Semiconductor Fabry-Perot Lasers},

  journal = {Quantum Electronics, IEEE Journal of},

  year = {2010},

  volume = {46},

  number = {7},

  pages = {1023 -1030},

  doi = {http://dx.doi.org/10.1109/JQE.2010.2042792}

}

Javaloyes, J.; Stolarz, P.; Hou, L.; Sorel, M.; Bryce, A.C. & Balle, S. Passive Mode-Locking in AlGaInAs 1.55-mu m strained quantum well lasers: Modeling and experiment 2010 Optical Communication (ECOC), 2010 36th European Conference and Exhibition on, pp. 1 -3  inproceedings DOI  
Abstract: We study the Mode-Locking dynamics of 40-GHz semiconductor Fabry-Perot lasers with intracavity saturable absorber by using a Traveling-Wave-Model and a time-domain response of the semiconductor material. We analyze the influence of key parameters and compare our predictions with experimental results.
BibTeX:

@inproceedings{5621528,

  author = {Javaloyes, J. and Stolarz, P. and Hou, L. and Sorel, M. and Bryce, A.C. and Balle, S.},

  title = {Passive Mode-Locking in AlGaInAs 1.55-mu m strained quantum well lasers: Modeling and experiment},

  booktitle = {Optical Communication (ECOC), 2010 36th European Conference and Exhibition on},

  year = {2010},

  pages = {1 -3},

  doi = {http://dx.doi.org/10.1109/ECOC.2010.5621528}

}

Haji, M.; Hou, L.; Kelly, A.E.; Green, R.; Mezosi, G.; Javaloyes, J.; Bryce, A.C. & Arnold, J.M. Sub-picosecond pulse generation using fast saturable absorption in AlGaInAs/InP quantum wells 2010 IEEE Photonics Society, 2010 23rd Annual Meeting of the, pp. 299 -300  inproceedings DOI  
Abstract: Fast saturable absorber recovery times have been obtained in AlGaInAs/InP multiple quantum wells using the cross absorption modulation method for wavelength conversion. We report sub-picosecond pulse generation using a 40 GHz passively mode locked laser.
BibTeX:

@inproceedings{5698878,

  author = {Haji, M. and Hou, L. and Kelly, A.E. and Green, R. and Mezosi, G. and Javaloyes, J. and Bryce, A.C. and Arnold, J.M.},

  title = {Sub-picosecond pulse generation using fast saturable absorption in AlGaInAs/InP quantum wells},

  booktitle = {IEEE Photonics Society, 2010 23rd Annual Meeting of the},

  year = {2010},

  pages = {299 -300},

  doi = {http://dx.doi.org/10.1109/PHOTONICS.2010.5698878}

}

Javaloyes, J. & Balle, S. Quasiequilibrium time-domain susceptibility of semiconductor quantum wells 2010 Physical Review A - Atomic, Molecular, and Optical Physics
Vol. 81, pp. 062505 
article DOI URL 
Abstract:

We analyze the time-domain optical response of quantum well (QW) media in the quasiequilibrium
approximation. The resulting macroscopic polarization can be expressed as a convolution integral that
permits a simple and efficient numerical implementation for its use in dynamical modeling. As a practical
example, the resulting polarization is used in conjunction with a travelling-wave model (TWM) for analyzing
saturable absorption as a pulse propagates in a waveguide that incorporates an unpumped QW in its core.
Frequency-selective saturable absorption and pulse distortion are observed.

BibTeX:

@article{IMEDEA_intranet:10019,

  author = {J. Javaloyes and S. Balle},

  title = {Quasiequilibrium time-domain susceptibility of semiconductor quantum wells},

  journal = {Physical Review A - Atomic, Molecular, and Optical Physics},

  year = {2010},

  volume = {81},

  pages = {062505},

  url = {http://www.imedea.uib.es/pub_download.php?id=10019},

  doi = {http://dx.doi.org/10.1103/PhysRevA.81.062505}

}

Consoli, A.; Esquivias, I.; Hernández, F. J. López; Mulet, J. & Balle, S. Characterization of Gain-Switched Pulses From 1.55-um VCSEL 2010 IEEE Photonics Technology Letters
Vol. 22, pp. 772-774 
article URL 
Abstract:

We report on short optical pulse generation by
gain-switching (GS) a low-cost commercial vertical-cavity surface-emitting laser emitting at 1.55 m. The dependence of pulse characteristics on GS parameters is investigated and analyzed. Pulses with duration of 55 ps and time-bandwidth product between 0.91 and 2.2 are obtained at repetition rates between 1 and 3 GHz.

BibTeX:

@article{IMEDEA_intranet:10381,

  author = {A. Consoli and I. Esquivias and F. J. López Hernández and J. Mulet and S. Balle},

  title = {Characterization of Gain-Switched Pulses From 1.55-um VCSEL},

  journal = {IEEE Photonics Technology Letters},

  year = {2010},

  volume = {22},

  pages = {772--774},

  url = {http://www.imedea.uib.es/pub_download.php?id=10381}

}

Alós, J.; Palmer, M.; Balle, S.; Grau, A. & Morales-Nin, B. Individual growth pattern and variability in Serranus scriba (Linnaeus, 1758): a Bayesian analysis. 2010 ICES Journal of Marine Science
Vol. 67, pp. 502-512 
article URL 
Abstract:

Variability in growth patterns at an individual level in Serranus scriba is described using a Bayesian approach for a generalized von
Bertalanffy growth model that accommodates one change in growth rate at a specific point during the lifespan. The approach
enables individual growth curves to be inferred, even in a species with a relatively short lifespan and no commercial value, i.e.
limited sample sizes available, but potentially endangered by recreational fishing. The change in growth rate may be the result of differ-
ing allocation of energy between reproductive and somatic activities at different ages. Overall, the approach presented provides ade-
quate input for future implementation of population dynamics models that take into account individual variability, e.g. individual-
based models, even for species for which limited data are available.

BibTeX:

@article{IMEDEA_intranet:2516,

  author = {Alós, J. and Palmer, M. and Balle, S. and Grau, A. and Morales-Nin, B.},

  title = {Individual growth pattern and variability in Serranus scriba (Linnaeus, 1758): a Bayesian analysis.},

  journal = {ICES Journal of Marine Science},

  year = {2010},

  volume = {67},

  pages = {502--512},

  url = {http://www.imedea.uib.es/pub_download.php?id=2516}

}

Ca nellas, B.; Balle, S.; Orfila, A. & Tintoré, J Wave height prediction in the Western Mediterranean using Genetic Algorithms 2010 Ocean Engineering
Vol. 37, pp. 742-748 
article DOI URL 
Abstract:

This study explores the suitability of a soft computing technique to predict (forecast and hindcast) significant wave heights in some areas of the Mediterranean Sea. Using a 44-year database of meteorological and oceanographic records we train a genetic algorithm, to reconstruct a 44-year time series of significant wave height at different coastal points of the Balearic Islands (Western Mediterranean). The correlation obtained between the numerical model data and the algorithm output is 0.80≤r2≤0.97. The equations obtained by the genetic algorithm are then used to predict significant wave heights measured at several buoys. We make use of the equation from the node closest to the buoy using as input wind data from the meteorological station at each buoy. We obtained that SWH at each buoy can be predicted with a 1-h ahead forecast time using only wind data from the previous 12 h with a correlation of 0.87≤r2≤0.91.

BibTeX:

@article{IMEDEA_intranet:2558,

  author = {Cañellas, B. and Balle, S. and Orfila, A. and Tintoré, J},

  title = {Wave height prediction in the Western Mediterranean using Genetic Algorithms},

  journal = {Ocean Engineering},

  year = {2010},

  volume = {37},

  pages = {742--748},

  url = {http://www.imedea.uib.es/pub_download.php?id=2558},

  doi = {http://dx.doi.org/10.1016/j.oceaneng.2010.02.006}

}

Nieto, M. A.; Garau, B.; Balle, S.; Simarro, G.; A., Zarruk G.; Ortiz, A.; Tintoré, J.; Álvarez-Ellacuría, A.; Gómez-Pujol, L. & Orfila, A An Open Source, Low Cost Video-Based Coastal Monitoring System 2010 Earth Surface Processes and Landforms
Vol. 35, pp. 1712-1719 
article DOI URL 
Abstract:

A low cost, automated, remote monitoring video system built on standard commercial off-the-shelf (COTS) components
and implemented with open source software is presented. The system has been implemented in a coastal area to perform
image acquisition and processing, generating statistical products and transferring the information from the fi eld to a central node
where post-processing and data visualization are made available to the general public. The open structure of the software allows
the user to implement new routines and modules appropriate to fi t specifi c needs as well as to adapt the system to study other
dynamical processes where continuous observation is required. The software and image data base can be obtained as freeware.
Copyright © 2010 John Wiley & Sons, Ltd.

BibTeX:

@article{IMEDEA_intranet:2559,

  author = {Nieto, M. A. and Garau, B. and Balle, S. and Simarro, G. and Zarruk G. A. and Ortiz, A. and Tintoré, J. and Álvarez-Ellacuría, A. and Gómez-Pujol, L. and Orfila, A},

  title = {An Open Source, Low Cost Video-Based Coastal Monitoring System},

  journal = {Earth Surface Processes and Landforms},

  year = {2010},

  volume = {35},

  pages = {1712--1719},

  url = {http://www.imedea.uib.es/pub_download.php?id=2559},

  doi = {http://dx.doi.org/10.1002/esp.2025}

}

Strain, M. J.; Mezösi, G.; Javaloyes, J.; Sorel, M.; Pérez-Serrano, A.; Sicrè, A. & Balle, S. Semiconductor Snail Lasers 2010 Applied Physics Letters
Vol. 96, pp. 121105 
article URL 
Abstract:

A modified ring laser geometry is presented to promote stable unidirectional lasing. The effects of
directional coupling and facet reflectivities are investigated with respect to quantum efficiency,
directionality, and side-mode suppression ratio of the lasing spectra. Simulation and experimental
results are presented showing single mode > 20 dB side-mode suppression ratio, unidirectional
lasing on an InP based multiple quantum well material.

BibTeX:

@article{IMEDEA_intranet:2560,

  author = {Strain, M. J. and Mezösi, G. and Javaloyes, J. and Sorel, M. and Pérez-Serrano, A. and Sicrè, A. and Balle, S.},

  title = {Semiconductor Snail Lasers},

  journal = {Applied Physics Letters},

  year = {2010},

  volume = {96},

  pages = {121105},

  url = {http://www.imedea.uib.es/pub_download.php?id=2560}

}

Pérez-Serrano, A.; Javaloyes, J. & Balle, S. Bi-chromatic emission and multi-mode dynamics in bidirectional Ring Lasers 2010 Physical Review A - Atomic, Molecular, and Optical Physics
Vol. 81, pp. 043817 
article URL 
Abstract:

The multimode dynamics of a two-level ring laser is explored numerically using a bidirectional traveling wave
model retaining the spatial effects due to the presence of counter-propagating electric fields in the population
inversion. Dynamical regimes where the emission in each direction occurs at different wavelengths are studied.
Mode-locked unidirectional emission for large gain bandwidth and relatively small detuning is reported.

BibTeX:

@article{IMEDEA_intranet:2561,

  author = {Pérez-Serrano, A. and Javaloyes, J. and Balle, S.},

  title = {Bi-chromatic emission and multi-mode dynamics in bidirectional Ring Lasers},

  journal = {Physical Review A - Atomic, Molecular, and Optical Physics},

  year = {2010},

  volume = {81},

  pages = {043817},

  url = {http://www.imedea.uib.es/pub_download.php?id=2561}

}

Pérez-Serrano, Antonio; Javaloyes, Julien & Balle, Salvador Erratum: Bichromatic emission and multimode dynamics in bidirectional ring lasers [Phys. Rev. A 81, 043817 (2010)] 2010 Phys. Rev. A
Vol. 82, pp. 019904 
article DOI URL 
BibTeX:

@article{PhysRevA.82.019904,

  author = {Pérez-Serrano, Antonio and Javaloyes, Julien and Balle, Salvador},

  title = {Erratum: Bichromatic emission and multimode dynamics in bidirectional ring lasers [Phys. Rev. A 81, 043817 (2010)]},

  journal = {Phys. Rev. A},

  publisher = {American Physical Society},

  year = {2010},

  volume = {82},

  pages = {019904},

  url = {http://link.aps.org/doi/10.1103/PhysRevA.82.019904},

  doi = {http://dx.doi.org/10.1103/PhysRevA.82.019904}

}

Javaloyes, J.; Trita, A.; Mezosi, G.; Bragheri, F.; Cristiani, I.; Giuliani, G.; Sorel, M.; Scire, A. & Balle, S. Ultrafast all-optical switching of bistable Semiconductor Ring Lasers 2009 Lasers and Electro-Optics 2009 and the European Quantum Electronics Conference. CLEO Europe - EQEC 2009. European Conference on, pp. 1  inproceedings DOI  
Abstract: Semiconductor ring lasers (SRLs) usually exhibit regimes of unidirectional operation, which offers a great potential for applications such as all-optical memories, switching and gating. In this paper, bistable semiconductor ring lasers of cavity lengths ranging from 1200 ¿m up to 1900 ¿m is fabricated. The devices were fabricated on a multiple quantum well AlGalnAs/InP wafer using a shallow etched technology. To study all-optical flip-flop operation of the device, 5 ps FWHM optical trigger pulses produced by an OPO is injected. In order to evaluate the limits of switching speed that can be achieved, numerical simulations of the SRL using a recently developed traveling-wave model is performed. The model includes coupling of the CW and CCW waves arising from both spectral- and spatial-hole burning in the carrier density. The numerical results are in excellent agreement with the experimental observations.
BibTeX:

@inproceedings{5191742,

  author = {Javaloyes, J. and Trita, A. and Mezosi, G. and Bragheri, F. and Cristiani, I. and Giuliani, G. and Sorel, M. and Scire, A. and Balle, S.},

  title = {Ultrafast all-optical switching of bistable Semiconductor Ring Lasers},

  booktitle = {Lasers and Electro-Optics 2009 and the European Quantum Electronics Conference. CLEO Europe - EQEC 2009. European Conference on},

  year = {2009},

  pages = {1},

  doi = {http://dx.doi.org/10.1109/CLEOE-EQEC.2009.5191742}

}

Perez-Serrano, A.; Furst, S.; Scire, A.; Javaloyes, J.; Sorel, M. & Balle, S. Modal structure of integrated Semiconductor Ring Lasers with output waveguides 2009 Lasers and Electro-Optics 2009 and the European Quantum Electronics Conference. CLEO Europe - EQEC 2009. European Conference on, pp. 1  inproceedings DOI  
Abstract: In recent years semiconductor ring lasers (SRLs) have attracted interest for their diverse potential application, e.g. their fast directional bistability recently opened up a new scenario for the development of all- optical memories and signal processing. Besides, SRLs show unexpected dynamical behaviors, such as hysteresis in the lasing direction, and peculiar lasing mode selection rules. In this contribution, we present an experimental and theoretical investigation concerning the modal structure and selection rules of a SRL with output waveguides.
BibTeX:

@inproceedings{5191792,

  author = {Perez-Serrano, A. and Furst, S. and Scire, A. and Javaloyes, J. and Sorel, M. and Balle, S.},

  title = {Modal structure of integrated Semiconductor Ring Lasers with output waveguides},

  booktitle = {Lasers and Electro-Optics 2009 and the European Quantum Electronics Conference. CLEO Europe - EQEC 2009. European Conference on},

  year = {2009},

  pages = {1},

  doi = {http://dx.doi.org/10.1109/CLEOE-EQEC.2009.5191792}

}

Javaloyes, J.; Mezosi, G.; Sorel, M. & Balle, S. Emission directionality of Semiconductor Ring Lasers 2009 Lasers and Electro-Optics 2009 and the European Quantum Electronics Conference. CLEO Europe - EQEC 2009. European Conference on, pp. 1  inproceedings DOI  
Abstract: Semiconductor ring lasers (SRL) are interesting devices from the technological point of view because they do not require cleaved facets or gratings in order to achieve the necessary optical feedback for lasing. In SRL, light extraction is accomplished via evanescent coupling from the waveguide into several output waveguides.
BibTeX:

@inproceedings{5194825,

  author = {Javaloyes, J. and Mezosi, G. and Sorel, M. and Balle, S.},

  title = {Emission directionality of Semiconductor Ring Lasers},

  booktitle = {Lasers and Electro-Optics 2009 and the European Quantum Electronics Conference. CLEO Europe - EQEC 2009. European Conference on},

  year = {2009},

  pages = {1},

  doi = {http://dx.doi.org/10.1109/CLEOE-EQEC.2009.5194825}

}

Javaloyes, J.; Hou, L.; Stolarz, P.; Green, R.P.; Ironside, C.N.; Sorel, M.; Arnold, J.M.; Bryce, A.C. & Balle, S. Wide range 40-GHz Passive Mode-Locking operation of an AlGaInAs 1.55-mu m Strained Quantum Well laser 2009 Lasers and Electro-Optics 2009 and the European Quantum Electronics Conference. CLEO Europe - EQEC 2009. European Conference on, pp. 1  inproceedings DOI  
Abstract: We develop a comprehensive theoretical description of passive mode-locked semiconductor lasers based on a coarse grained time-domain approach. Under the approximation of intraband quasi equilibrium, our model accounts for the dispersion of gain, absorption and refractive index, nonlinear gain saturation from ultrafast processes, self-phase modulation, and spontaneous emission noise. We compare the predictions of our model with the perforamances of a quasi-40-GHz passively mode-locked AlGalnAs 1.55-m Strained Quantum Well laser.
BibTeX:

@inproceedings{5196429,

  author = {Javaloyes, J. and Hou, L. and Stolarz, P. and Green, R.P. and Ironside, C.N. and Sorel, M. and Arnold, J.M. and Bryce, A.C. and Balle, S.},

  title = {Wide range 40-GHz Passive Mode-Locking operation of an AlGaInAs 1.55-mu m Strained Quantum Well laser},

  booktitle = {Lasers and Electro-Optics 2009 and the European Quantum Electronics Conference. CLEO Europe - EQEC 2009. European Conference on},

  year = {2009},

  pages = {1},

  doi = {http://dx.doi.org/10.1109/CLEOE-EQEC.2009.5196429}

}

Hou, Lianping; Stolarz, P.; Javaloyes, J.; Green, R.P.; Ironside, C.N.; Sorel, M. & Bryce, A.C. Subpicosecond Pulse Generation at Quasi-40-GHz Using a Passively Mode-Locked AlGaInAs-InP 1.55- hbox m Strained Quantum-Well Laser 2009 Photonics Technology Letters, IEEE
Vol. 21(23), pp. 1731 -1733 
article DOI  
Abstract: We report on subpicosecond pulse generation using passively mode-locked laser diodes based on AlGaInAs 1.55-mum strained multiquantum-wells. Without any external pulse compression, the nearly transform-limited Gaussian pulses are generated at the quasi-40-GHz repetition rate with the 700-fs pulse duration.
BibTeX:

@article{5233855,

  author = {Lianping Hou and Stolarz, P. and Javaloyes, J. and Green, R.P. and Ironside, C.N. and Sorel, M. and Bryce, A.C.},

  title = {Subpicosecond Pulse Generation at Quasi-40-GHz Using a Passively Mode-Locked AlGaInAs-InP 1.55- hbox m Strained Quantum-Well Laser},

  journal = {Photonics Technology Letters, IEEE},

  year = {2009},

  volume = {21},

  number = {23},

  pages = {1731 -1733},

  doi = {http://dx.doi.org/10.1109/LPT.2009.2031088}

}

Trita, A.; Latorre Vidal, M.J.; Zanola, M.; Mezosi, G.; Javaloyes, J.; Sorel, M.; Bragheri, F.; Cristiani, I.; Scire, A.; Balle, S. & Giuliani, G. All-optical Set-Reset Flip-Flop based on semiconductor ring laser: Ultrafast response and error-free Bit-Error-Rate operation 2009 Photonics in Switching, 2009. PS '09. International Conference on, pp. 1 -2  inproceedings DOI  
Abstract: A monolithic semiconductor ring laser (SRL) operates as all-optical Flip-Flop. We report on ps-scale temporal response and Bit-Error-Rate experiments.
BibTeX:

@inproceedings{5307798,

  author = {Trita, A. and Latorre Vidal, M.J. and Zanola, M. and Mezosi, G. and Javaloyes, J. and Sorel, M. and Bragheri, F. and Cristiani, I. and Scire, A. and Balle, S. and Giuliani, G.},

  title = {All-optical Set-Reset Flip-Flop based on semiconductor ring laser: Ultrafast response and error-free Bit-Error-Rate operation},

  booktitle = {Photonics in Switching, 2009. PS '09. International Conference on},

  year = {2009},

  pages = {1 -2},

  doi = {http://dx.doi.org/10.1109/PS.2009.5307798}

}

Bryce, A.C.; Stolarz, P.; Javaloyes, J.; Hou, L.; Sorel, M. & Balle, S. Passive mode-locking of AlGaInAs quantum well laser, modelling and experiment 2009 LEOS Annual Meeting Conference Proceedings, 2009. LEOS '09. IEEE, pp. 515 -516  inproceedings DOI  
Abstract: We have developed a comprehensive theoretical description of passive mode-locked semiconductor lasers based on a coarse-grained time-domain approach. The results are compared with the performance of a passively mode-locked AlGaInAs strained quantum well lasers.
BibTeX:

@inproceedings{5343169,

  author = {Bryce, A.C. and Stolarz, P. and Javaloyes, J. and Hou, L. and Sorel, M. and Balle, S.},

  title = {Passive mode-locking of AlGaInAs quantum well laser, modelling and experiment},

  booktitle = {LEOS Annual Meeting Conference Proceedings, 2009. LEOS '09. IEEE},

  year = {2009},

  pages = {515 -516},

  doi = {http://dx.doi.org/10.1109/LEOS.2009.5343169}

}

Javaloyes, Julien & Balle, Salvador Emission Directionality of Semiconductor Ring Lasers: A Traveling-Wave Description 2009 IEEE Journal of Quantum Electronics
Vol. 45, pp. 431-438 
article URL 
Abstract:

We use a traveling-wave model for explaining the experimentally observed changes in the directionality of the emission of semiconductor ring lasers and its different behavior when current is increased or decreased. The modulation of the cavity losses imposed by the light extraction sections together with the thermal shift of the gain spectrum and spatial hole burning in the carrier density play a crucial role in the directionality of the emission and its changes with operation current. The differences as the current is increased or decreased correspond to the different role played by spatial hole burning.

BibTeX:

@article{IMEDEA_intranet:2328,

  author = {Javaloyes,Julien and Balle,Salvador},

  title = {Emission Directionality of Semiconductor Ring Lasers: A Traveling-Wave Description},

  journal = {IEEE Journal of Quantum Electronics},

  year = {2009},

  volume = {45},

  pages = {431--438},

  url = {http://www.imedea.uib.es/pub_download.php?id=2328}

}

Perez-Serrano, A.; Furst, S.; Scire, A.; Javaloyes, J.; Balle, S. & Sorel, M. Modal structure of integrated semiconductor ring lasers with output waveguides 2008 Semiconductor Laser Conference, 2008. ISLC 2008. IEEE 21st International, pp. 129 -130  inproceedings DOI  
Abstract: We have experimentally and theoretically analyzed the modal properties of semiconductor ring lasers and the wavelength jumps that occur in connection with directional switching above threshold.
BibTeX:

@inproceedings{4636043,

  author = {Perez-Serrano, A. and Furst, S. and Scire, A. and Javaloyes, J. and Balle, S. and Sorel, M.},

  title = {Modal structure of integrated semiconductor ring lasers with output waveguides},

  booktitle = {Semiconductor Laser Conference, 2008. ISLC 2008. IEEE 21st International},

  year = {2008},

  pages = {129 -130},

  doi = {http://dx.doi.org/10.1109/ISLC.2008.4636043}

}

Sanchez-Naves, J.; Furfaro, L.; Piro, O. & Balle, S. Impact and permanence of LASIK-induced structural changes in the cornea on pneumotonometric measurements: contributions of flap cutting and stromal ablation 2008 Journal of Glaucoma
Vol. 19, pp. 611-618 
article URL 
Abstract:

PURPOSE: to determine the factors that lead to changes in intraocular pressure (IOP) measurements after LASIK and their long-term stability. PATIENTS AND METHODS: 522 myopic eyes and 296 hyperopic eyes were enrolled in the study. Pneumotonometry was used to measure IOP once in the preoperative stage, and twice in the postoperative stage: one month after the operation, and one year later. Ultrasonic pachymetry was used to determine pre- and intraoperative corneal thicknesses and axial length of the eye, while optical pachymetry was utilized in the pre-operative stage and one month after surgery. Corneal topography was used to determine the pre- and postoperative mean curvature of the anterior surface of the cornea over 3 and 5 mm diameter regions. Comparative statistical analysis of the retrospective data series was performed. RESULTS: a highly significant reduction of IOP readings is found after LASIK for both myopic and hyperopic eyes. The reduction is stable one year after LASIK. In the case of myopic eyes, the reduction has a highly significant linear correlation with the amount of tissue ablated in the central region of the cornea. CONCLUSIONS: pneumotonometric IOP readings after LASIK are reduced, without recovering preoperative values even one year after surgery, due to flap cutting and tissue removal in the central region of the cornea. The contribution of flap cutting is estimated to be (1.6 +/- 0.8) mm Hg, while ablation contributes an additional (0.029 +/- 0.003) mm Hg per um of removed tissue. This effect should be considered when evaluating the accuracy of IOP measurements in LASIK patients who are at risk for developing glaucoma.

BibTeX:

@article{IMEDEA_intranet:2300,

  author = {J. Sanchez-Naves and L. Furfaro and O. Piro and S. Balle},

  title = {Impact and permanence of LASIK-induced structural changes in the cornea on pneumotonometric measurements: contributions of flap cutting and stromal ablation},

  journal = {Journal of Glaucoma},

  year = {2008},

  volume = {19},

  pages = {611--618},

  url = {http://www.imedea.uib.es/pub_download.php?id=2300}

}

Fürst, S.; Perez-Serrano, A.; Scirè, A.; Sorel, M. & Balle, S. Modal Structure, Directional and Wavelength Jumps of Integrated Semiconductor Ring Lasers:: Experiment and Theory 2008 Applied Physics Letters
Vol. 93, pp. 251109 
article URL 
Abstract:

We have experimentally and theoretically analyzed the modal properties of semiconductor ring
lasers and the wavelength jumps that occur in connection with directional switching above the
threshold.

BibTeX:

@article{IMEDEA_intranet:2301,

  author = {S. Fürst and A. Perez-Serrano and A. Scirè and M. Sorel and S. Balle},

  title = {Modal Structure, Directional and Wavelength Jumps of Integrated Semiconductor Ring Lasers:: Experiment and Theory},

  journal = {Applied Physics Letters},

  year = {2008},

  volume = {93},

  pages = {251109},

  url = {http://www.imedea.uib.es/pub_download.php?id=2301}

}

Mulet, J.; Balle, S.; Arias, J.; Martín-Hériz, V. & Esquivias, I. Current self-distribution effects in oxide confined vertical-cavity surface-emitting lasers 2008 Optical and Quantum Electronics
Vol. 40, pp. 1199-1204 
article URL 
Abstract:

We develop a self-consistent electro-optical model for oxide-confined Vertical-
Cavity Surface-Emitting Lasers, including optical polarization and spin-flip dynamics. When
subject to large signal modulation, current self-distribution effects reduce the amount of
spatial-hole burning in the device, leading to a reduced overshoot during transients and an
increased damping of the relaxation oscillations.

BibTeX:

@article{IMEDEA_intranet:2564,

  author = {Mulet, J. and Balle, S. and Arias, J. and Martín-Hériz, V. and Esquivias, I.},

  title = {Current self-distribution effects in oxide confined vertical-cavity surface-emitting lasers},

  journal = {Optical and Quantum Electronics},

  year = {2008},

  volume = {40},

  pages = {1199--1204},

  url = {http://www.imedea.uib.es/pub_download.php?id=2564}

}

Javaloyes, J.; Perrin, M. & Politi, A Collective atomic recoil laser as a synchronization transition 2008 Phys. Rev. E
Vol. 78, pp. 011108 
article DOI URL 
BibTeX:

@article{PhysRevE.78.011108,

  author = {Javaloyes, J. and Perrin, M. and Politi, A},

  title = {Collective atomic recoil laser as a synchronization transition},

  journal = {Phys. Rev. E},

  publisher = {American Physical Society},

  year = {2008},

  volume = {78},

  pages = {011108},

  url = {http://link.aps.org/doi/10.1103/PhysRevE.78.011108},

  doi = {http://dx.doi.org/10.1103/PhysRevE.78.011108}

}

S., Antonio Pérez; Fürst, Sandor; Scirè, Alessandro; Javaloyes, Julien; Balle, Salvador & Sorel, Marc Modelling strategies for semiconductor ring lasers 2008 Semiconductor Lasers and Laser Dynamics III
Vol. 6997(1), pp. 69971N 
conference DOI URL 
BibTeX:

@conference{s.:69971N,

  author = {Antonio Pérez S. and Sandor Fürst and Alessandro Scirè and Julien Javaloyes and Salvador Balle and Marc Sorel},

  title = {Modelling strategies for semiconductor ring lasers},

  journal = {Semiconductor Lasers and Laser Dynamics III},

  publisher = {SPIE},

  year = {2008},

  volume = {6997},

  number = {1},

  pages = {69971N},

  url = {http://link.aip.org/link/?PSI/6997/69971N/1},

  doi = {http://dx.doi.org/10.1117/12.780847}

}

Javaloyes, J. & Balle, S. Influence of Thermal Effects on Cross-Gain Modulation Characteristics in VCSOA 2007 Quantum Electronics, IEEE Journal of
Vol. 43(1), pp. 65 -71 
article DOI  
Abstract: We study theoretically and numerically the influence of thermal effects on the cross-gain modulation (XGM) characteristics of vertical-cavity semiconductor-optical amplifiers. We show that heating of the device may lead to noticeable modifications of the XGM efficiency spectrum, leading even to negative XGM efficiency, in good agreement with recent experimental results
BibTeX:

@article{4049857,

  author = {Javaloyes, J. and Balle, S.},

  title = {Influence of Thermal Effects on Cross-Gain Modulation Characteristics in VCSOA},

  journal = {Quantum Electronics, IEEE Journal of},

  year = {2007},

  volume = {43},

  number = {1},

  pages = {65 -71},

  doi = {http://dx.doi.org/10.1109/JQE.2006.885207}

}

Javaloyes, J.; Mulet, J.; Giudici, M. & Balle, S. Passive mode-locking of lasers by crossed-polarization gain modulation 2007 Lasers and Electro-Optics, 2007 and the International Quantum Electronics Conference. CLEOE-IQEC 2007. European Conference on, pp. 1  inproceedings DOI  
Abstract: Passive mode-locking (PML) of VCSEL by crossed-polarisation gain modulation is studied. PML at repetition rates in the GHz range and pulsewidths of few tens of picoseconds were found using a two-mode rate equation mode where feedback and reinjection are included as delayed terms. Preliminary experimental results relating a recent realization of this scheme to the case of small area proton implanted VCSEL at 850 nm is also presented.
BibTeX:

@inproceedings{4386024,

  author = {Javaloyes, J. and Mulet, J. and Giudici, M. and Balle, S.},

  title = {Passive mode-locking of lasers by crossed-polarization gain modulation},

  booktitle = {Lasers and Electro-Optics, 2007 and the International Quantum Electronics Conference. CLEOE-IQEC 2007. European Conference on},

  year = {2007},

  pages = {1},

  doi = {http://dx.doi.org/10.1109/CLEOE-IQEC.2007.4386024}

}

Giudici, M.; Mulet, J.; Javaloyes, J. & Balle, S. Square-wave switching by crossed-polarization reinjection in VCSELs 2007 Lasers and Electro-Optics, 2007 and the International Quantum Electronics Conference. CLEOE-IQEC 2007. European Conference on, pp. 1  inproceedings DOI  
Abstract: We take a VCSEL that emits stably in a linearly polarized state (X) and we make it experience crossed-polarization reinjection (XPR) of the lasing into the non-lasing linear polarization. The lasing threshold is not modified by the level of XPR. For currents close to the laser threshold the output is quite irregular, but square-wave switching develops when the current is increased however, a degradation of the square-wave switching is observed when current is further increased. Degradation of the square-wave switching is linked to the finite value of the spin-flip rate and the residual dichroism, and it occurs when the current approaches the boundaries of polarization bistability for the solitary VCSEL.
BibTeX:

@inproceedings{4386994,

  author = {Giudici, M. and Mulet, J. and Javaloyes, J. and Balle, S.},

  title = {Square-wave switching by crossed-polarization reinjection in VCSELs},

  booktitle = {Lasers and Electro-Optics, 2007 and the International Quantum Electronics Conference. CLEOE-IQEC 2007. European Conference on},

  year = {2007},

  pages = {1},

  doi = {http://dx.doi.org/10.1109/CLEOE-IQEC.2007.4386994}

}

Mulet, Josep; Javaloyes, Julien & Balle, Salvador Mode-Locking of VECSELs by Crossed-Polarization Gain Modulation 2007 IEEE Journal of Quantum Electronics
Vol. 43(9), pp. 786-793 
article URL 
Abstract:

We analyze in detail an approach for inducing passive
mode-locking (ML) in vertical-external-cavity surface-emitting lasers (VECSELs) without using any saturable absorber but directly exploiting the lightwave polarization degree of freedom. Part of the VECSEL output, which is forced to be linearly polarized, is reinjected into the optical amplifier after a delay time and rotating its polarization state by 90º. In the active medium, both polarizations interact via cross-gain modulation. A comprehensive time-domain model including polarization and carrier spin dynamics is derived from fundamental principles. The model is used to evaluate the feasibility and robustness of the ML scheme. We obtain mode-locked pulses of ~10-ps duration at repetition
rates up to 20 GHz. The reinjection delay time defines resonance conditions where the maximum power and shortest pulsewidth are obtained. Stable fundamentalMLis surrounded by regimes of harmonic and incomplete ML.Atransition leading from self-pulsation to ML is obtained for sufficiently long reinjection delay times.

BibTeX:

@article{IMEDEA_intranet:10127,

  author = {Josep Mulet and Julien Javaloyes and Salvador Balle},

  title = {Mode-Locking of VECSELs by Crossed-Polarization Gain Modulation},

  journal = {IEEE Journal of Quantum Electronics},

  year = {2007},

  volume = {43},

  number = {9},

  pages = {786--793},

  url = {http://www.imedea.uib.es/pub_download.php?id=10127}

}

Tessone, Claudio Juan; Scirè, Alessandro; Toral, Raul & Colet, Pere Theory of collective firing induced by noise or diversity in excitable media 2007 Physical Review E - Statistical, Nonlinear, and Soft Matter Physics
Vol. 75, pp. 016203 (1-5) 
article URL 
Abstract: Large variety of physical, chemical, and biological systems show excitable behavior, characterized by a nonlinear response under external perturbations: only perturbations exceeding a threshold induce a full system response (firing). It has been reported that in coupled excitable identical systems noise may induce the simultaneous firing of a macroscopic fraction of units. However, a comprehensive understanding of the role of noise and that of natural diversity present in realistic systems is still lacking. Here we develop a theory for the emergence of collective firings in nonidentical excitable systems subject to noise. Three different dynamical regimes arise: subthreshold motion, where all elements remain confined near the fixed point; coherent pulsations, where a macroscopic fraction fire simultaneously; and incoherent pulsations, where units fire in a disordered fashion. We also show that the mechanism for collective firing is generic: it arises from degradation of entrainment originated either by noise or by diversity.
BibTeX:

@article{IMEDEA_intranet:1449,

  author = {Tessone, Claudio Juan and Scirè, Alessandro and Toral, Raul and Colet, Pere},

  title = {Theory of collective firing induced by noise or diversity in excitable media},

  journal = {Physical Review E - Statistical, Nonlinear, and Soft Matter Physics},

  year = {2007},

  volume = {75},

  pages = {016203 (1--5)},

  url = {http://www.imedea.uib.es/pub_download.php?id=1449}

}

Marino, Francesco; Marin, Francesco; Balle, Salvador & Piro, Oreste Chaotically spiking canards in an excitable system with 2D inertial fast manifolds 2007 Physical Review Letters
Vol. 98, pp. 074104 
article URL 
Abstract:

We introduce a new class of excitable systems with two-dimensional fast dynamics that includes inertia. A novel transition from excitability to relaxation oscillations is discovered where the usual Hopf bifurcation is followed by a cascade of period doubled and chaotic small excitable attractors and, as they grow, by a new type of canard explosion where a small chaotic background erratically but deterministically triggers excitable spikes. This scenario is also found in a model for a nonlinear Fabry-Perot cavity with one pendular mirror.

BibTeX:

@article{IMEDEA_intranet:1821,

  author = {Marino, Francesco and Marin, Francesco and Balle, Salvador and Piro, Oreste},

  title = {Chaotically spiking canards in an excitable system with 2D inertial fast manifolds},

  journal = {Physical Review Letters},

  year = {2007},

  volume = {98},

  pages = {074104},

  url = {http://www.imedea.uib.es/pub_download.php?id=1821}

}

Mulet, J.; Giudici, M.; Javaloyes, J. & Balle, S. Square-wave switching by crossed-polarization gain modulation in vertical-cavity semiconductor lasers 2007 Phys. Rev. A
Vol. 76, pp. 043801 
article DOI URL 
BibTeX:

@article{PhysRevA.76.043801,

  author = {Mulet, J. and Giudici, M. and Javaloyes, J. and Balle, S.},

  title = {Square-wave switching by crossed-polarization gain modulation in vertical-cavity semiconductor lasers},

  journal = {Phys. Rev. A},

  publisher = {American Physical Society},

  year = {2007},

  volume = {76},

  pages = {043801},

  url = {http://link.aps.org/doi/10.1103/PhysRevA.76.043801},

  doi = {http://dx.doi.org/10.1103/PhysRevA.76.043801}

}

Mulet, J. & Balle, S. Modeling and optimization of vertical-external-cavity surface-emitting diode lasers for passive mode-locking 2006 Proceedings of the SPIE
Vol. 6184(6184), pp. 61841B 
inproceedings DOI URL 
Abstract:

We present a comprehensive description of electrically-driven vertical-external-cavity surface-emitting diode lasers (VECSELs) at 980nm, mode-locked by saturable absorber mirrors. A novel partially-integrated time-domain model combines accuracy and flexibility, allowing for a semi-analytical stability analysis of the compoundcavity modes, tracking the mode-locking onset and an optimization analysis. The linear stability analysis of the compound-cavity modes indicates that single mode solutions exist and are stable only in a limited current range around threshold. Increasing the current above this current level leads to a multimode solution through a Hopf bifurcation. This bifurcation point is followed by a continuous transition leading from harmonic oscillations to fully-developed pulses that correspond to the mode-locked solution. We obtain stable, fully-developed modelocked pulses of few tens of picoseconds at 15 GHz repetition rate in good agreement with reported experimental results. We discuss the dependence of the mode-locking regimes on the reflectivity of the distributed Bragg reflectors, spot area of the spatial mode, and number of quantum wells in the emitter and absorber cavities. The optimization analysis reveals that, in order to favor the mode-locking onset, the effective coupling between the emitter and saturable absorber cavities has to be optimized through the standing wave pattern in the composite cavity and spot-area of the spatial modes.

BibTeX:

@inproceedings{IMEDEA_intranet:1696,

  author = {Mulet, J. and Balle, S.},

  title = {Modeling and optimization of vertical-external-cavity surface-emitting diode lasers for passive mode-locking},

  journal = {Proceedings of the SPIE},

  year = {2006},

  volume = {6184},

  number = {6184},

  pages = {61841B},

  url = {http://www.imedea.uib.es/pub_download.php?id=1696},

  doi = {http://link.aip.org/link/doi/10.1117/12.661774}

}

Scirè, A; Sorel, M; Giuliani, G; Colet, P; Pérez, Toni & Mirasso, C.R. All-optical two-mode switching in semiconductor ring lasers 2006 invalid journal  inproceedings URL 
Abstract: We have theoretically investigated the bifurcation scenario that leads to the emergence of a bistable regime in a two-mode model for a Semiconductor Ring Laser. The bistability takes place between two quasi-unidirectional solutions for the electric field, which are selected as stable solutions via gain-crossaturation, for well-above threshold operating conditions. Furthermore, we analyzed the switching properties of a single Semiconductor Ring Laser (SRL) operating in the bistable regime, under coherent optical pulse injection, in view of the possible implementation of a single SRL an optically adressable memory element. The result is that the response time and the minimum switching energy respectively attain values the order of a few tenth of ps, and 1 fJ. Those values are espected to scale down with the device radius, due to the consequent decreasing of the cavity flight time. We have observed that the fast switching dynamic is due to an energy redistribution process between the two counterpropagating modes, that does not involve the (slow) carrier density through field-medium energy exchange processes. This allows to attain time scales much faster than the typical limit represented by the inverse of relaxation oscillation frequency.
BibTeX:

@inproceedings{IMEDEA_intranet:1697,

  author = {Scirè, A and Sorel, M and Giuliani, G and Colet, P and Pérez, Toni and Mirasso, C.R.},

  title = {All-optical two-mode switching in semiconductor ring lasers},

  journal = {invalid journal},

  year = {2006},

  url = {http://www.imedea.uib.es/pub_download.php?id=1697}

}

Scirè, A; Sorel, M; Colet, P; Tessone, C.J.; Mirasso, C.R & San Miguel, M Two-mode dynamics in different semiconductor laser structures 2006 invalid journal  inproceedings URL 
Abstract: We review three two-mode models for different semiconductor laser structures: Vertical-Cavity Surface-Emitting Lasers (VCSELs), Twin-Stripe Semiconductor-Lasers (TSSL), and Semiconductor Ring Lasers (SRL). The VCSELs model and TSSL model display rich dynamic behavior when a saturable absorber is embedded in the cavity. VCSELs with saturable absorber showed polarization chaos, which found applications in encoded communications; TSSLs with saturable absorber show coherent locked states as well as chaotic behavior; and SRLs show a complex two-mode dynamics giving rise to bidirectional operation, alternate oscillations and spontaneous symmetry breaking toward quasi-unidirectional bistable solutions, with potential applications to all-optical switching.
BibTeX:

@inproceedings{IMEDEA_intranet:1698,

  author = {Scirè, A and Sorel,M and Colet,P and Tessone,C.J. and Mirasso, C.R and San Miguel,M},

  title = {Two-mode dynamics in different semiconductor laser structures},

  journal = {invalid journal},

  year = {2006},

  url = {http://www.imedea.uib.es/pub_download.php?id=1698}

}

Giuliani, G; Scirè, A; Sorel, M & Donati, S Linewidth of monolithic semiconductor ring lasers 2006 invalid journal  inproceedings URL 
Abstract: In this work we numerically calculate the linewidth of a single-mode monolithic Semiconductor Ring Laser (SRL) operating in the unidirectional regime. A new expression for the SRL linewidth is derived from the conventional Henrys formula, and the importance of different physical parameters is discussed. In particular, the linewidth is mainly determined by the SRL diameter, because the waveguide bending loss have a very strong dependence on the diameter. We show that circular SRLs with diameter smaller than 180 μm are unlikely to be operated CW. As a general rule, the linewidth decreases for increasing SRL diameter, and it varies from 15 MHz for 200 μm diameter down to 1 MHz for 2000 μm diameter.
BibTeX:

@inproceedings{IMEDEA_intranet:1699,

  author = {Giuliani,G and Scirè, A and Sorel,M and Donati,S},

  title = {Linewidth of monolithic semiconductor ring lasers},

  journal = {invalid journal},

  year = {2006},

  url = {http://www.imedea.uib.es/pub_download.php?id=1699}

}

Furst, A; Sorel, M; Scirè, A; Giuliani, G & Yu, S Technological challenges for CW operation of small-radius semiconductor ring lasers 2006 invalid journal  inproceedings URL 
Abstract: Theoretical investigation and device measurements are reported to demonstrate the strict fabrication requirements of small diameter shallow etched semiconductor ring lasers. A very accurate control over the dry etching depth is crucial to both minimise the bending losses and achieve very precise control of the coupling ratio in directional couplers. A reactive ion etching process was developed on Aluminium-quaternary wafer structures, showing selectivity greater than 30 between the AlInAs core layer and the InP upper cladding. The process proved very effective in providing a complete and controllable etching of directional couplers with 500nm wide gaps. Assessment on the effect of the bending losses and on the minimum ring radius was performed through characterisation of half ring lasers. A minimum current threshold of 34mA is reported on 150μm ring radius devices emitting at 1300nm.
BibTeX:

@inproceedings{IMEDEA_intranet:1700,

  author = {Furst,A and Sorel,M and Scirè,A and Giuliani,G and Yu,S},

  title = {Technological challenges for CW operation of small-radius semiconductor ring lasers},

  journal = {invalid journal},

  year = {2006},

  url = {http://www.imedea.uib.es/pub_download.php?id=1700}

}

Pedaci, Francesco; Lepri, Stefano; Balle, Salvador; Giacomelli, Giovanni; Giudici, Massimo & Tredicce, Jorge R. Multiplicative noise in the longitudinal mode dynamics of a bulk semiconductor laser 2006 Physical Review E - Statistical, Nonlinear, and Soft Matter Physics
Vol. 73, pp. 041101 
article URL 
Abstract:

We analyze theoretically and experimentally the influence of current noise on the longitudinal mode hopping dynamics of a bulk semiconductor laser. It is shown that the mean residence times on each mode have different sensitivity to external noise added to the bias current. In particular, an increase of the noise level enhances the residence time on the longitudinal mode that dominates at low current, evidencing the multiplicative nature of the stochastic process. A two-mode rate equation model for a semiconductor laser is able to reproduce the experimental findings. Under a suitable separation of the involved time scales, the model can be reduced to a one-dimensional bistable potential system with a multiplicative stochastic term related to the current noise strength. The reduced model clarifies the influence of the different noise sources on the hopping dynamics.

BibTeX:

@article{IMEDEA_intranet:1723,

  author = {Pedaci, Francesco and Lepri, Stefano and Balle, Salvador and Giacomelli, Giovanni and Giudici, Massimo and Tredicce, Jorge R.},

  title = {Multiplicative noise in the longitudinal mode dynamics of a bulk semiconductor laser},

  journal = {Physical Review E - Statistical, Nonlinear, and Soft Matter Physics},

  year = {2006},

  volume = {73},

  pages = {041101},

  url = {http://www.imedea.uib.es/pub_download.php?id=1723}

}

Van der Sande, Guy; Peeters, Michael; Veretennicoff, Irina; Danckaert, Jan; Verschaffelt, Guy & Balle, Salvador The effects of Stress, Temperatue and Spin Flips on Polarization Switching in VCSELS 2006 IEEE Journal of Quantum Electronics
Vol. 42, pp. 896-904 
article URL 
Abstract:

We discuss the effect of uniaxial planar stress on polarization switching in vertical-cavity surface-emitting lasers (VCSELs). The approach is based on an explicit form of a frequency-dependent complex susceptibility of the uniaxially stressed quantum-well semiconductor material. In this mesoscopic framework, we have taken cavity anisotropies, spin carrier dynamics, and thermal shift of the gain curve into account. In this way, we present a model that provides a global overview of the polarization switching phenomenon. The results are compared with experiments on an air-post VCSEL operating at 980 nm.

BibTeX:

@article{IMEDEA_intranet:1770,

  author = {Van der Sande, Guy and Peeters, Michael and Veretennicoff, Irina and Danckaert, Jan and Verschaffelt, Guy and Balle, Salvador},

  title = {The effects of Stress, Temperatue and Spin Flips on Polarization Switching in VCSELS},

  journal = {IEEE Journal of Quantum Electronics},

  year = {2006},

  volume = {42},

  pages = {896--904},

  url = {http://www.imedea.uib.es/pub_download.php?id=1770}

}

Javaloyes, Julien; Mulet, Josep & Balle, Salvador Passive Mode Locking of Lasers by Crossed-Polarization Gain Modulation 2006 Physical Review Letters
Vol. 97, pp. 163902 
article URL 
Abstract:

We report on a novel approach for inducing passive mode locking of lasers without using any saturable absorber but exploiting the polarization degree of freedom of light. In our scheme, passive mode locking is achieved by crossed-polarization gain modulation caused by the reinjection of a polarization-rotated replica of the laser output after a time delay. The reinjection time delay defines resonance tongues that correspond to mode-locking operation. Numerical continuation reveals that the cw solution is destabilized through a Hopf bifurcation that defines the onset of multimode operation which evolves sharply into a mode-locked solution. Our approach can be applied to a large variety of laser systems. For vertical-cavity surface-emitting lasers, we demonstrate stable mode-locked pulses at repetition rates in the GHz range and pulse widths of few tens of picoseconds.

BibTeX:

@article{IMEDEA_intranet:1791,

  author = {Javaloyes, Julien and Mulet, Josep and Balle, Salvador},

  title = {Passive Mode Locking of Lasers by Crossed-Polarization Gain Modulation},

  journal = {Physical Review Letters},

  year = {2006},

  volume = {97},

  pages = {163902},

  url = {http://www.imedea.uib.es/pub_download.php?id=1791}

}

Gattobigio, G. L.; Michaud, F.; Javaloyes, J.; Tabosa, J. W. R. & Kaiser, R. Bunching-induced asymmetry in degenerate four-wave mixing with cold atoms 2006 Phys. Rev. A
Vol. 74, pp. 043407 
article DOI URL 
BibTeX:

@article{PhysRevA.74.043407,

  author = {Gattobigio, G. L. and Michaud, F. and Javaloyes, J. and Tabosa, J. W. R. and Kaiser, R.},

  title = {Bunching-induced asymmetry in degenerate four-wave mixing with cold atoms},

  journal = {Phys. Rev. A},

  publisher = {American Physical Society},

  year = {2006},

  volume = {74},

  pages = {043407},

  url = {http://link.aps.org/doi/10.1103/PhysRevA.74.043407},

  doi = {http://dx.doi.org/10.1103/PhysRevA.74.043407}

}

Javaloyes, J.; Perrin, M.; Lippi, G.L. & Politi, A. Coherent light emission by self-induced spatial longitudinal patterns in a Rb85 molasses 2005 Quantum Electronics Conference, 2005. EQEC '05. European, pp. 110  inproceedings DOI  
Abstract: This experiment investigates coherent light emission by self-induced spatial longitudinal patterns in an optically cooled Rb85 molasses. This work adapts the CARL model to include a ring cavity while taking into account the specific nature of the interaction with the Doppler beams (noise included). Taking advantage of the very different natural time scales present in the experiment, the dimensionality of the problem has been reduced. The resulting, strongly reduced model, consists of a Fokker-Planck equation for the probability distribution of atomic positions and momenta, coupled to two ordinary differential equations describing the evolution of the counter propagating fields in the resonator.
BibTeX:

@inproceedings{1567281,

  author = {Javaloyes, J. and Perrin, M. and Lippi, G.L. and Politi, A.},

  title = {Coherent light emission by self-induced spatial longitudinal patterns in a Rb85 molasses},

  booktitle = {Quantum Electronics Conference, 2005. EQEC '05. European},

  year = {2005},

  pages = { 110},

  doi = {http://dx.doi.org/10.1109/EQEC.2005.1567281}

}

Hachair, X.; Furfaro, L.; Javaloyes, J.; Guidici, M.; Balle, S.; Tredicce, J.; Tissoni, G.; Lugiato, L.A.; Brambilla, M. & Maggipinto, T. Cavity soliton switching in semiconductor microresonators 2005 Quantum Electronics Conference, 2005. EQEC '05. European, pp. 128  inproceedings DOI  
Abstract: This work experimentally and numerically investigates the cavity solitons switch-on process in semiconductor microresonators. This is a highly relevant feature to applications since its duration determines the maximum speed at which the device can be addressed. Numerical simulations show a very good agreement with the experimental findings, both from the qualitative and quantitative viewpoints.
BibTeX:

@inproceedings{1567299,

  author = {Hachair, X. and Furfaro, L. and Javaloyes, J. and Guidici, M. and Balle, S. and Tredicce, J. and Tissoni, G. and Lugiato, L.A. and Brambilla, M. and Maggipinto, T.},

  title = {Cavity soliton switching in semiconductor microresonators},

  booktitle = {Quantum Electronics Conference, 2005. EQEC '05. European},

  year = {2005},

  pages = { 128},

  doi = {http://dx.doi.org/10.1109/EQEC.2005.1567299}

}

F., Marino; L., Furfaro & S., Balle Cross gain modulation in broad area vertical cavity semiconductor amplifier 2005 Applied Physics Letters
Vol. 86, pp. 151116 
article URL 
Abstract:

We demonstrate that broad-area vertical-cavity semiconductor optical amplifiers allow for wavelength conversion at 2.5 Gb/ s via cross-gain modulation sXGMd. XGM is reached with a saturation beam of only 1.5 mW over an optical bandwidth of 0.7 nm s215 GHzd. Depending on the wavelengths of the injected fields, inverted or noninverted output can be obtained.

BibTeX:

@article{IMEDEA_intranet:1186,

  author = {Marino F. and Furfaro L. and Balle S.},

  title = {Cross gain modulation in broad area vertical cavity semiconductor amplifier},

  journal = {Applied Physics Letters},

  year = {2005},

  volume = {86},

  pages = {151116},

  url = {http://www.imedea.uib.es/pub_download.php?id=1186}

}

Scirè, Alessandro; Tessone, Claudio J. & Colet, Pere Dynamics of Coupled Self-Pulsating Semiconductor Lasers 2005 IEEE Journal of Quantum Electronics
Vol. 41, pp. 272-279 
article URL 
Abstract: We introduce and analyze a model for the dynamics of two coupled self-pulsating semiconductor lasers. We investigate the role of the complex coupling coefficient in the static and dynamic properties of the device. We find conditions for the emergence of coherent laser pulses, in which the two lasers display synchronous coherent self-pulsations (self-pulsating super-modes). Non-linear dynamics and two different routes to chaos are also individuated and discussed.
BibTeX:

@article{IMEDEA_intranet:1199,

  author = {Scirè, Alessandro and Tessone, Claudio J. and Colet, Pere},

  title = {Dynamics of Coupled Self-Pulsating Semiconductor Lasers},

  journal = {IEEE Journal of Quantum Electronics},

  year = {2005},

  volume = {41},

  pages = {272--279},

  url = {http://www.imedea.uib.es/pub_download.php?id=1199}

}

Giuliani, G; Miglierina, R; Sorel, M & Scirè, A Self- and Cross-Correlation Measurements of Counterpropagating Modes in GaAs/AlGaAs Semiconductor Ring Laser 2005 invalid journal
Vol. 11, pp. 1187-1192 
article URL 
BibTeX:

@article{IMEDEA_intranet:1263,

  author = {Giuliani,G and Miglierina,R and Sorel,M and Scirè,A},

  title = {Self- and Cross-Correlation Measurements of Counterpropagating Modes in GaAs/AlGaAs Semiconductor Ring Laser},

  journal = {invalid journal},

  year = {2005},

  volume = {11},

  pages = {1187--1192},

  url = {http://www.imedea.uib.es/pub_download.php?id=1263}

}

F., Marino & S., Balle Excitable optical waves in semiconductor microcavities 2005 Physical Review Letters
Vol. 94, pp. 094101 
article URL 
Abstract:

We demonstrate experimentally and theoretically the existence of excitable optical waves in semiconductor microcavities. Although similar to those observed in biological and chemical systems, these excitable optical waves are self-confined. This is due to a new dynamical scenario, where a stationary Turing pattern controls the propagation of waves in an excitable medium, thus bringing together the two paradigms of dynamical behavior (waves and patterns) in active media.

BibTeX:

@article{IMEDEA_intranet:1396,

  author = {Marino F. and Balle S.},

  title = {Excitable optical waves in semiconductor microcavities},

  journal = {Physical Review Letters},

  year = {2005},

  volume = {94},

  pages = {094101},

  url = {http://www.imedea.uib.es/pub_download.php?id=1396}

}

Furfaro, L; Pedaci, F; Javaloyes, J; Hachair, X; Giudici, M; Balle, S; Tredicce & J. Modal Switching in Quantum-Well Semiconductor Lasers With Weak Optical Feedback 2005 IEEE Journal of Quantum Electronics
Vol. 41, pp. 609-618 
article URL 
Abstract:

We analyze theoretically and experimentally how the
modal dynamics of quantum-well semiconductor lasers is affected
by weak optical feedback. Without feedback, these lasers exhibit
a regular switching among several longitudinal modes, following
a well determined modal sequence and leaving the total intensity
output constant. Using a multimode theoretical model we have
identified the four wave mixing as the dominant mechanism at
the origin of these intriguing dynamics, while the asymmetry of
the susceptibility function of semiconductor materials allows to
explain the modal sequence. In this manuscript we show that
these dynamics, which is almost insensitive to current noise or
modulation, is instead extremely sensitive to optical feedback. The
experimental results are satisfactorily compared with the numerical
predictions of the model, properly adapted for including weak
optical feedback.

BibTeX:

@article{IMEDEA_intranet:1438,

  author = {Furfaro, L and Pedaci, F and Javaloyes, J and Hachair, X and Giudici, M and Balle,S and Tredicce and J.},

  title = {Modal Switching in Quantum-Well Semiconductor Lasers With Weak Optical Feedback},

  journal = {IEEE Journal of Quantum Electronics},

  year = {2005},

  volume = {41},

  pages = {609--618},

  url = {http://www.imedea.uib.es/pub_download.php?id=1438}

}

Mulet, Josep & Balle, Salvador Mode-locking dynamics in electrically-driven vertical-external-cavity surface-emitting lasers 2005 IEEE Journal of Quantum Electronics
Vol. 41, pp. 1148-1156 
article URL 
Abstract:

We develop a novel description of electrically-driven vertical-external-cavity surface-emitting semiconductor lasers (VECSELs) mode-locked by saturable absorber mirrors. Our approach is based on an analytical solution of the bidirectional traveling-wave equations for fundamental transverse mode operation. The resulting time-domain equations describe the evolution of the electric fields and carrier-densities at the quantum well layers of the emitter and absorber structures which are coupled through delayed boundary conditions. For the design considered, we obtain stable mode-locked pulses of few tens of picoseconds at 15 GHz repetition rate in agreement with recently reported experimental results.

BibTeX:

@article{IMEDEA_intranet:1443,

  author = {Mulet, Josep and Balle, Salvador},

  title = {Mode-locking dynamics in electrically-driven vertical-external-cavity surface-emitting lasers},

  journal = {IEEE Journal of Quantum Electronics},

  year = {2005},

  volume = {41},

  pages = {1148--1156},

  url = {http://www.imedea.uib.es/pub_download.php?id=1443}

}

Barland, S.; Hachair, X.; Giudici, M.; Balle, S.; Tredicce, J.R. Tissoni, G.; Spinelli, L.; Lugiato, L. & Brambilla, M. Spatial decorrelation in broad-area edge-emitting semiconductor amplifiers 2005 European Physical Journal D
Vol. 32, pp. 75-82 
article URL 
Abstract:

We analyze experimentally the spatio-temporal dynamics of the transverse structures appearing in broad area edge-emitting semiconductor amplifiers under CW optical injection. We demonstrate that, in certain conditions, the light reflected by the system exhibits a multipeaked structure whose dependence on the parameters suggests an interpretation in terms of cavity solitons. These structures can exhibit self-pulsations with periods of the order of few milliseconds, which we explain in terms of regenerative thermal oscillations. In a particular device, we generate two single-peak structures which are spatially uncorrelated, as required for cavity solitons. A microscopic model shows good agreement with the main body of the experimental results.

BibTeX:

@article{IMEDEA_intranet:1458,

  author = {Barland, S. and Hachair, X. and Giudici, M. and Balle, S. and Tredicce, J.R. Tissoni, G. and Spinelli, L. and Lugiato, L. and Brambilla, M.},

  title = {Spatial decorrelation in broad-area edge-emitting semiconductor amplifiers},

  journal = {European Physical Journal D},

  year = {2005},

  volume = {32},

  pages = {75--82},

  url = {http://www.imedea.uib.es/pub_download.php?id=1458}

}

van der Sande, G.; Danckaert, J.; Veretennicoff, I.; Panajotov, K. & Balle, S. Analytical approximation for the quantum-well gain and refractive-index spectra of vertical-cavity surface-emitting lasers including the effect of uniaxial planar stress 2005 Physical Review A - Atomic, Molecular, and Optical Physics
Vol. 71, pp. 063801 
article URL 
Abstract:

Starting from a microscopic model in the free-carrier approximation, we derive an analytical approximation for the optical susceptibility of uniaxially stressed quantum-well lasers at low temperatures by neglecting second-order contributions of the band-mixing phenomenon. The resulting polarization-dependent peak gains, differential peak gains, transparency carrier densities, and linewidth enhancement factors as induced by the uniaxial planar stress are discussed.

BibTeX:

@article{IMEDEA_intranet:1566,

  author = {van der Sande, G. and Danckaert, J. and Veretennicoff, I. and Panajotov, K. and Balle, S.},

  title = {Analytical approximation for the quantum-well gain and refractive-index spectra of vertical-cavity surface-emitting lasers including the effect of uniaxial planar stress},

  journal = {Physical Review A - Atomic, Molecular, and Optical Physics},

  year = {2005},

  volume = {71},

  pages = {063801},

  url = {http://www.imedea.uib.es/pub_download.php?id=1566}

}

Kinast, Joseph; Turlapov, Andrey; Thomas, John E.; Javaloyes, Julien; Courteille, Philippe W.; Perrin, Mathias; Lippi, Gian Luca & Politi, Antonio Cooling and Trapping 2005 Optics & Photonics News
Vol. 16(12), pp. 21-22 
article DOI URL 
BibTeX:

@article{kinast:21,

  author = {Joseph Kinast and Andrey Turlapov and John E. Thomas and Julien Javaloyes and Philippe W. Courteille and Mathias Perrin and Gian Luca Lippi and Antonio Politi},

  title = {Cooling and Trapping},

  journal = {Optics & Photonics News},

  publisher = {OSA},

  year = {2005},

  volume = {16},

  number = {12},

  pages = {21-22},

  url = {http://www.opticsinfobase.org/abstract.cfm?URI=OPN-16-12-21},

  doi = {http://dx.doi.org/10.1364/OPN.16.12.000021}

}

Hachair, X.; Furfaro, L.; Javaloyes, J.; Giudici, M.; Balle, S.; Tredicce, J.; Tissoni, G.; Lugiato, L. A.; Brambilla, M. & Maggipinto, T. Cavity-solitons switching in semiconductor microcavities 2005 Phys. Rev. A
Vol. 72, pp. 013815 
article DOI URL 
BibTeX:

@article{PhysRevA.72.013815,

  author = {Hachair, X. and Furfaro, L. and Javaloyes, J. and Giudici, M. and Balle, S. and Tredicce, J. and Tissoni, G. and Lugiato, L. A. and Brambilla, M. and Maggipinto, T.},

  title = {Cavity-solitons switching in semiconductor microcavities},

  journal = {Phys. Rev. A},

  publisher = {American Physical Society},

  year = {2005},

  volume = {72},

  pages = {013815},

  url = {http://link.aps.org/doi/10.1103/PhysRevA.72.013815},

  doi = {http://dx.doi.org/10.1103/PhysRevA.72.013815}

}

Furfaro, Luca; Yacomotti, Alejandro; Pedaci, Francesco; Hachair, Xavier; Javaloyes, Julien; Giudici, Massimo; Tredicce, Jorge R.; Balle, Salvador; Mandel, Paul & Viktorov, Evgeny Multimode dynamics of semiconductor lasers 2004 Semiconductor Lasers and Laser Dynamics
Vol. 5452(1), pp. 411-421 
conference DOI URL 
BibTeX:

@conference{furfaro:411,

  author = {Luca Furfaro and Alejandro Yacomotti and Francesco Pedaci and Xavier Hachair and Julien Javaloyes and Massimo Giudici and Jorge R. Tredicce and Salvador Balle and Paul Mandel and Evgeny Viktorov},

  title = {Multimode dynamics of semiconductor lasers},

  journal = {Semiconductor Lasers and Laser Dynamics},

  publisher = {SPIE},

  year = {2004},

  volume = {5452},

  number = {1},

  pages = {411-421},

  url = {http://link.aip.org/link/?PSI/5452/411/1},

  doi = {http://dx.doi.org/10.1117/12.545514}

}

Marzena, Ciszak; Francesco, Marino; Raúl, Toral & Salvador, Balle Dynamical mechanism of anticipating synchronization in excitable systems 2004 Physical Review Letters
Vol. 93, pp. 114102 
article URL 
Abstract:

We analyze the phenomenon of anticipating synchronization of two excitable systems with unidirectional
delayed coupling which are subject to the same external forcing. We demonstrate for different
paradigms of excitable system that, due to the coupling, the excitability threshold for the slave system is
always lower than that for the master. As a consequence the two systems respond to a common external
forcing with different response times. This allows us to explain in a simple way the mechanism behind
the phenomenon of anticipating synchronization in excitable systems.

BibTeX:

@article{IMEDEA_intranet:1000,

  author = {Ciszak Marzena and Marino Francesco and Toral Raúl and Balle Salvador},

  title = {Dynamical mechanism of anticipating synchronization in excitable systems},

  journal = {Physical Review Letters},

  year = {2004},

  volume = {93},

  pages = {114102},

  url = {http://www.imedea.uib.es/pub_download.php?id=1000}

}

F., Marino & S., Balle Experimental study of a broad area vertical-cavity semiconductor optical amplifier 2004 Optics Communications
Vol. 231, pp. 325-330 
article URL 
Abstract:

An experimental study of a broad-area vertical-cavity semiconductor optical amplifier in the 980 nm wavelength
range is reported. We show that the gain and the saturation power in such a device increase as the transverse dimension
of the injected beam is increased. A gain of 16.3 dB with 0.8 nm optical bandwidth and saturation power of 1.4 mW has
been obtained. The polarization sensitivity of the device is also studied. We show that birefringence in the cavity affects
the polarization insensitivity expected in ideal devices as a consequence of the circular symmetry of the cavity. A brief
study of the wavelength dependence of the output transverse profile is also reported.

BibTeX:

@article{IMEDEA_intranet:1005,

  author = {Marino F. and Balle S.},

  title = {Experimental study of a broad area vertical-cavity semiconductor optical amplifier},

  journal = {Optics Communications},

  year = {2004},

  volume = {231},

  pages = {325--330},

  url = {http://www.imedea.uib.es/pub_download.php?id=1005}

}

F., Marino; G., Catalan; P., Sanchez; S., Balle & O., Piro Thermo-optical canard-orbits and excitable limit cycles 2004 Physical Review Letters
Vol. 92, pp. 073901 
article URL 
Abstract:

We demonstrate experimentally and theoretically the existence of canard orbits and excitable
quasiharmonic limit cycles in the thermo-optical dynamics of semiconductor optical amplifiers. We
also observe the phase locking of the noise-induced spikes to the small-amplitude Hopf quasiharmonic
oscillations, recently predicted by Makarov, Nekorkin, and Velarde [Phys. Rev. Lett. 86, 3431 (2001)].

BibTeX:

@article{IMEDEA_intranet:1006,

  author = {Marino F. and Catalan G. and Sanchez P. and Balle S. and Piro O.},

  title = {Thermo-optical canard-orbits and excitable limit cycles},

  journal = {Physical Review Letters},

  year = {2004},

  volume = {92},

  pages = {073901},

  url = {http://www.imedea.uib.es/pub_download.php?id=1006}

}

A.Scirè, P.Colet, M. San Miguel Phase Synchronization and Polarization Ordering of Globally Coupled Oscillators 2004 Physical Review E - Statistical, Nonlinear, and Soft Matter Physics
Vol. 70, pp. 035201(R) (1-4) 
article URL 
Abstract: We introduce a prototype model for globally-coupled oscillators in which each element is given an oscillation frequency and a preferential oscillation direction (polarization), both randomly distributed. We found two collective transitions: to phase synchronization and to polarization ordering. Introducing a global-phase and a polarization order parameters, we show that the transition to global-phase synchrony is found when the coupling overcomes a critical value and that polarization order enhancement can not take place before global-phase synchrony. We develop a self-consistent theory to determine both order parameters in good agreement with numerical results.
BibTeX:

@article{IMEDEA_intranet:1064,

  author = {A.Scirè, P.Colet,M. San Miguel},

  title = {Phase Synchronization and Polarization Ordering of Globally Coupled Oscillators},

  journal = {Physical Review E - Statistical, Nonlinear, and Soft Matter Physics},

  year = {2004},

  volume = {70},

  pages = {035201(R) (1--4)},

  url = {http://www.imedea.uib.es/pub_download.php?id=1064}

}

Scirè, A.; Mulet, J.; Mirasso, C.R. & San Miguel, M. Modeling of Vertical-Cavity Surface Emitting Lasers: State of The Art and New Results 2004 invalid journal
Vol. 15, pp. 21-26 
article URL 
BibTeX:

@article{IMEDEA_intranet:1065,

  author = {Scirè, A. and Mulet, J. and Mirasso, C.R. and San Miguel, M.},

  title = {Modeling of Vertical-Cavity Surface Emitting Lasers: State of The Art and New Results},

  journal = {invalid journal},

  year = {2004},

  volume = {15},

  pages = {21--26},

  url = {http://www.imedea.uib.es/pub_download.php?id=1065}

}

Sondermann, Markus; Ackemann, Thorsten; Balle, Salvador; Mulet, Josep & Panajotov, Krassimir Experimental and theoretical investigations on elliptically polarized dynamical transition states in the polarization switching of vertical-cavity surface-emitting lasers 2004 Optics Communications
Vol. 235, pp. 421-434 
article URL 
Abstract:

The existence region of elliptically polarized dynamical states in the polarization dynamics of vertical-cavity surface emitting lasers is investigated experimentally and theoretically. These states can occur in the vicinity of a polarization switching from the fundamental transverse mode with lower emission frequency to the mode with higher frequency. It is demonstrated experimentally that these states may occur in a single as well as in a double switching scenario. The existence of the dynamical states is shown to be independent from the ellipticity of the state of polarization at the lasing threshold. Furthermore, the in uence of the detuning between the band gap and the cavity resonance on the occurrence of the dynamical states is investigated.

BibTeX:

@article{IMEDEA_intranet:1066,

  author = {Sondermann, Markus and Ackemann, Thorsten and Balle, Salvador and Mulet, Josep and Panajotov, Krassimir},

  title = {Experimental and theoretical investigations on elliptically polarized dynamical transition states in the polarization switching of vertical-cavity surface-emitting lasers},

  journal = {Optics Communications},

  year = {2004},

  volume = {235},

  pages = {421--434},

  url = {http://www.imedea.uib.es/pub_download.php?id=1066}

}

Hachair, X.; Barland, S.; Furfaro, L..; Balle, S.; Tredicce, J.R.; Brambilla, M.; Maggipinto, T.; Perrini, I.M.; Tissoni, G. & Lugiato, L.A. Cavity solitons in broad-area vertical-cavity surface-emitting lasers below threshold 2004 Physical Review A - Atomic, Molecular, and Optical Physics
Vol. 69, pp. 043817 
article URL 
Abstract:

Cavity solitons are stationary self-organized bright intensity peaks which form over a homogeneous back-ground in the section of broad area radiation beams. They are generated by shining a writing/erasing laser pulse into a nonlinear optical cavity, driven by a holding beam. The ability to control their location and their motion by introducing phase or amplitude gradients in the holding beam makes them interesting as mobile pixels for all-optical processing units. We show the generation of a number of cavity solitons in broad-area vertical cavity semiconductor microresonators electrically pumped above transparency but slightly below threshold. We ana-lyze the switching process in details. The observed spots can be written, erased, and manipulated as indepen-dent objects, as predicted by the theoretical model. An especially tailored one is used to simulate the studied phenomena and to compare our simulations to the experimental findings with good agreement.

BibTeX:

@article{IMEDEA_intranet:1387,

  author = {Hachair, X. and Barland, S. and Furfaro, L.. and Balle, S. and Tredicce, J.R. and Brambilla, M. and Maggipinto, T. and Perrini, I.M. and Tissoni, G. and Lugiato, L.A.},

  title = {Cavity solitons in broad-area vertical-cavity surface-emitting lasers below threshold},

  journal = {Physical Review A - Atomic, Molecular, and Optical Physics},

  year = {2004},

  volume = {69},

  pages = {043817},

  url = {http://www.imedea.uib.es/pub_download.php?id=1387}

}

Yacomotti, A.; Furfaro, L.; Hachair, X.; Pedaci, F.; Giudici, M.; Tredicce, J.; Javaloyes, J.; Balle, S.; Viktorov, E.A. & Mandel, P. Dynamics of Multimode Semiconductor Lasers 2004 Physical Review A - Atomic, Molecular, and Optical Physics
Vol. 69, pp. 053816 
article URL 
Abstract:

We analyze multi-longitudinal-mode semiconductor lasers experimentally. We show that the intensity of each mode displays large amplitude oscillations but obeys a highly organized antiphase dynamics leading to an almost constant total intensity output. For each mode, regular switching is observed in the megahertz range, while the optical frequency as a function of time follows a well defined sequence from blue to red. Using a multimode theoretical model, we identify that four-wave mixing is the dominant mechanism at the origin of the observed dynamics. The asymmetry of the susceptibility function of semiconductor materials allows us to explain the optical frequency sequence.

BibTeX:

@article{IMEDEA_intranet:1388,

  author = {Yacomotti, A. and Furfaro, L. and Hachair, X. and Pedaci, F. and Giudici, M. and Tredicce, J. and Javaloyes, J. and Balle, S. and Viktorov, E.A. and Mandel, P.},

  title = {Dynamics of Multimode Semiconductor Lasers},

  journal = {Physical Review A - Atomic, Molecular, and Optical Physics},

  year = {2004},

  volume = {69},

  pages = {053816},

  url = {http://www.imedea.uib.es/pub_download.php?id=1388}

}

Furfaro, L; Pedaci, F; Giudici, M; Hachair, X; Tredicce, J & Balle, S. Mode-Switching in Semiconductor Lasers 2004 IEEE Journal of Quantum Electronics
Vol. 40, pp. 1365-1376 
article URL 
Abstract:

In this paper, we experimentally analyze the modal
dynamics of quantum-well semiconductor lasers. Modal switching
is the dominant feature for semiconductor lasers that exhibit two
or several active longitudinal modes in their time-averaged optical
spectrum. In quantum-well lasers, these dynamics involve a periodic
switching among several longitudinal modes, which follows a
well-determined sequence from the bluest to the reddest mode in
the optical spectrum. This feature is radically different from the
well-known noise-driven mode-hopping occurring in bulk lasers
which involves only two main modes. We analyze the differences
in modal dynamics for these two kinds of laser by comparing the
modal switching statistics and by studying the effects of noise and
modulation in the pumping current.

BibTeX:

@article{IMEDEA_intranet:1439,

  author = {Furfaro, L and Pedaci, F and Giudici, M and Hachair, X and Tredicce, J and Balle, S.},

  title = {Mode-Switching in Semiconductor Lasers},

  journal = {IEEE Journal of Quantum Electronics},

  year = {2004},

  volume = {40},

  pages = {1365--1376},

  url = {http://www.imedea.uib.es/pub_download.php?id=1439}

}

Eguiluz, Victor M.; Hernandez-Garcia, Emilio & Piro, Oreste Boundary-forced spatial chaos 2004 , pp. 205-212  inbook URL 
Abstract: We show that the presence of undulated boundaries
can induce the formation of spatially
chaotic, stationary, and stable structures in models as simple
as the Fisher-Kolmogorov equation, which does not display any
kind of chaos under common boundaries.

The files can be found
HERE.
BibTeX:

@inbook{IMEDEA_intranet:313,

  author = {Eguiluz, Victor M. and Hernandez-Garcia, Emilio and Piro, Oreste},

  title = {Boundary-forced spatial chaos},

  publisher = {Kluwer academic publishers, Dordrecht},

  year = {2004},

  pages = {205--212},

  url = {http://www.imedea.uib.es/pub_download.php?id=313}

}

Javaloyes, J.; Perrin, M.; Lippi, G. L. & Politi, A. Self-generated cooperative light emission induced by atomic recoil 2004 Phys. Rev. A
Vol. 70, pp. 023405 
article DOI URL 
BibTeX:

@article{PhysRevA.70.023405,

  author = {Javaloyes, J. and Perrin, M. and Lippi, G. L. and Politi, A.},

  title = {Self-generated cooperative light emission induced by atomic recoil},

  journal = {Phys. Rev. A},

  publisher = {American Physical Society},

  year = {2004},

  volume = {70},

  pages = {023405},

  url = {http://link.aps.org/doi/10.1103/PhysRevA.70.023405},

  doi = {http://dx.doi.org/10.1103/PhysRevA.70.023405}

}

Perrin, M.; Javaloyes, J.; Lippi, G.L. & Politi, A. Spontaneous generation of a density grating in atomic vapours interacting with a strong electromagnetic field 2003 Quantum Electronics Conference, 2003. EQEC '03. European, pp. 50  inproceedings DOI  
Abstract: This study shows that, for appropriate parameter values, a stable density grating can spontaneously emerge and be sustained over arbitrarily long times in a generalized model. The onset of a non-zero bunching is accompanied by a nonzero value of the coherence parameter. This regime, occurring at sufficiently low temperatures, is therefore characterized by both coherence and bunching-values different from zero. In order to shed some light on the role played by the two order parameters, the authors have reconstructed a detailed phase diagram by exploring their dependence on the pump intensity and on the temperature.
BibTeX:

@inproceedings{1313907,

  author = {Perrin, M. and Javaloyes, J. and Lippi, G.L. and Politi, A.},

  title = {Spontaneous generation of a density grating in atomic vapours interacting with a strong electromagnetic field},

  booktitle = {Quantum Electronics Conference, 2003. EQEC '03. European},

  year = {2003},

  pages = { 50},

  doi = {http://dx.doi.org/10.1109/EQEC.2003.1313907}

}

Barland, S.; Piro, O.; Giudici, M.; Tredicce, J.R. & Balle, S. Experimental evidence of van der Pol-Fitzhugh-Nagumo dynamics in semiconductor optical amplifiers 2003 Physical Review E - Statistical, Nonlinear, and Soft Matter Physics
Vol. 68, pp. 036209 
article URL 
Abstract:

Thermo-optical pulsing in semiconductor amplifiers is experimentally shown to correspond to a very com-mon excitable scenario ~the van der Pol Fitzhugh Nagumo system!. Self-sustained oscillations appear in the sequence predicted by this simple dynamical model as we change either the injection level or the bias current. Periodic modulation of these parameters leads to the characteristic phase-locking structure. Furthermore, co-herence resonance is observed when external noise is added to the system.

BibTeX:

@article{IMEDEA_intranet:1017,

  author = {Barland, S. and Piro, O. and Giudici, M. and Tredicce, J.R. and Balle, S.},

  title = {Experimental evidence of van der Pol-Fitzhugh-Nagumo dynamics in semiconductor optical amplifiers},

  journal = {Physical Review E - Statistical, Nonlinear, and Soft Matter Physics},

  year = {2003},

  volume = {68},

  pages = {036209},

  url = {http://www.imedea.uib.es/pub_download.php?id=1017}

}

Marino, Francesco; Barland, Stephan & Balle, Salvador Single-mode operation and transverse-mode control in VCSELs induced by frequency-selective feedback 2003 IEEE Photonics Technology Letters
Vol. 15, pp. 789-791 
article URL 
Abstract:

An experimental study of a vertical-cavity surfaceemitting
laser with frequency-selective feedback is reported. We
show that we can force the laser to emit in its fundamental transverse
mode or in a higher order transverse mode and that we can
also control the polarization emitted in the fundamental one. We
obtain single fundamental-mode operation within a large range of
injection current values (almost ~2.5 I_th) and a maximum optical
power of 2.7 mW. In this current range, the output is found to be
stable.

BibTeX:

@article{IMEDEA_intranet:1189,

  author = {Marino, Francesco and Barland, Stephan and Balle, Salvador},

  title = {Single-mode operation and transverse-mode control in VCSELs induced by frequency-selective feedback},

  journal = {IEEE Photonics Technology Letters},

  year = {2003},

  volume = {15},

  pages = {789--791},

  url = {http://www.imedea.uib.es/pub_download.php?id=1189}

}

Sorel, M; Giuliani, G; Scire, A; Miglierina, M; Laybourn, P & Donati, S Operating Regimes of GaAs-AlGaAs Semiconductor Ring Lasers: Experiment and Model 2003 IEEE Journal of Quantum Electronics
Vol. 39, pp. 1187-1195 
article URL 
Abstract: Operating Regimes of GaAs-AlGaAs Semiconductor Ring Lasers: Experiment and Model
BibTeX:

@article{IMEDEA_intranet:547,

  author = {Sorel,M and Giuliani,G and Scire,A and Miglierina,M and Laybourn,P and Donati,S},

  title = {Operating Regimes of GaAs-AlGaAs Semiconductor Ring Lasers: Experiment and Model},

  journal = {IEEE Journal of Quantum Electronics},

  year = {2003},

  volume = {39},

  pages = {1187--1195},

  url = {http://www.imedea.uib.es/pub_download.php?id=547}

}

A. Scire, J. Mulet, C.R.Mirasso J. Danckaert & Miguel, M. San Vectorial chaos synchronization and polarization message encoding in VCSELs 2003 Physical Review Letters
Vol. 90, pp. 113901 (1-4) 
article URL 
BibTeX:

@article{IMEDEA_intranet:552,

  author = {A. Scire, J. Mulet, C.R.Mirasso, J. Danckaert and M. San Miguel},

  title = {Vectorial chaos synchronization and polarization message encoding in VCSELs},

  journal = {Physical Review Letters},

  year = {2003},

  volume = {90},

  pages = {113901 (1--4)},

  url = {http://www.imedea.uib.es/pub_download.php?id=552}

}

Eguíluz, Víctor M.; Hernández-García, Emilio; Piro, Oreste & Klemm, Konstantin Effective dimensions and percolation in hierarchicaly structured scale-free networks 2003 Physical Review E - Statistical, Nonlinear, and Soft Matter Physics
Vol. 68, pp. 055102 (1-4) 
article URL 
Abstract: We introduce appropriate definitions of dimensions in order to characterize the fractal properties of complex networks. We compute these dimensions in a hierarchically structured network of particular interest. In spite of the nontrivial character of this network that displays scale-free connectivity among other features, it turns out to be approximately one-dimensional. The dimensional characterization is in agreement with the results on statistics of site percolation and other dynamical processes implemented on such a network.
BibTeX:

@article{IMEDEA_intranet:593,

  author = {Eguíluz, Víctor M. and Hernández-García, Emilio and Piro, Oreste and Klemm, Konstantin},

  title = {Effective dimensions and percolation in hierarchicaly structured scale-free networks},

  journal = {Physical Review E - Statistical, Nonlinear, and Soft Matter Physics},

  year = {2003},

  volume = {68},

  pages = {055102 (1--4)},

  url = {http://www.imedea.uib.es/pub_download.php?id=593}

}

Barland, S.; Marino, F.; Giudici, M.; Tredicce, J. & S., Balle In situ measurements of the cavity length variation across the transverse section of broad area VCSELs 2003 Applied Physics Letters
Vol. 83, pp. 2303-2305 
article URL 
Abstract:

We present a method to measure the cavity length variations of a broad-area vertical-cavity
surface-emitting laser. The method is based on the observation of an inhomogeneous nonlinear
response of the system under coherent optical injection. Due to the presence of a cavity resonance
frequency gradient in the system, the boundary of a modulational instability manifests itself as a
separation of the device in two distinct spatial regions. The observation of the position of this
boundary depending on parameters reveals the degree of homogeneity of the sample and allows a
direct measurement of the spatial variations of the cavity resonance frequency.

BibTeX:

@article{IMEDEA_intranet:596,

  author = {Barland, S. and Marino, F. and Giudici, M. and Tredicce, J. and Balle S.},

  title = {In situ measurements of the cavity length variation across the transverse section of broad area VCSELs},

  journal = {Applied Physics Letters},

  year = {2003},

  volume = {83},

  pages = {2303--2305},

  url = {http://www.imedea.uib.es/pub_download.php?id=596}

}

Scirè, A.; Colet, P. & San Miguel, M. Phase and polarization synchronization in vectorial oscillators 2003 invalid journal  article URL 
BibTeX:

@article{IMEDEA_intranet:597,

  author = {Scirè, A. and Colet, P. and San Miguel, M.},

  title = {Phase and polarization synchronization in vectorial oscillators},

  journal = {invalid journal},

  year = {2003},

  url = {http://www.imedea.uib.es/pub_download.php?id=597}

}

Barland, Stéphane; Giudici, Massimo; Tredicce, Jorge R. & Balle, Salvador Procesado óptico de información. Solitones de cavidad 2003 Investigación y Ciencia
Vol. 322 (Julio 2003, pp. 38-40 
article URL 
Abstract:

Cavity solitons are localized intensity peaks that can form in a
homogeneous background of radiation. They are generated by
shining laser pulses into optical cavities that contain a nonlinear
medium driven by a coherent field (holding beam). The ability to
switch cavity solitons on and off and to control their location
and motion by applying laser pulses makes them interesting as
potential ‘pixels’ for reconfigurable arrays or all-optical processing
units. Theoretical work on cavity solitons has stimulated a
variety of experiments in macroscopic cavities and in systems with optical feedback. But for practical devices, it is desirable
to generate cavity solitons in semiconductor structures, which
would allow fast response and miniaturization. The existence of
cavity solitons in semiconductor microcavities has been predicted
theoretically, and precursors of cavity solitons have
been observed, but clear experimental realization has been
hindered by boundary-dependence of the resulting optical patterns —cavity solitons should be self-confined. Here we
demonstrate the generation of cavity solitons in vertical cavity
semiconductor microresonators that are electrically pumped
above transparency but slightly below lasing threshold. We
show that the generated optical spots can be written, erased
and manipulated as objects independent of each other and of the
boundary. Numerical simulations allow for a clearer interpretation
of experimental results.

BibTeX:

@article{IMEDEA_intranet:602,

  author = {Stéphane Barland and Massimo Giudici and Jorge R. Tredicce and Salvador Balle},

  title = {Procesado óptico de información. Solitones de cavidad},

  journal = {Investigación y Ciencia},

  year = {2003},

  volume = {322 (Julio 2003},

  pages = {38--40},

  url = {http://www.imedea.uib.es/pub_download.php?id=602}

}

Sondermann, M.; Weinkath, M.; Ackemann, T.; Mulet, J. & Balle, S. Two-frequency emission and polarization dynamics at lasing threshold in vertical-cavity surface-emitting lasers 2003 Physical Review A - Atomic, Molecular, and Optical Physics
Vol. 68, pp. 033822 
article URL 
Abstract:

We investigate experimentally and theoretically the polarization dynamics in vertical-cavity surface-emitting lasers in the vicinity of the lasing threshold. If the net gain anisotropy between the two orthogonally polarized modes is close to zero, the laser operates in a partially polarized state. This state occurs at and slightly above the lasing threshold. It is characterized by anticorrelated dynamics of the two modes which result from completely anticorrelated dynamics at low frequencies and correlated dynamics on the time scale of the relaxation oscillations. If the net anisotropy is changed by a change of the detuning between the cavity resonance and the gain maximum, one of the two linear polarization states is selected depending on the sign of the net gain. For one sign the well-known phenomenon of polarization switching is recovered at higher currents. The experimental results show very good agreement with simulations based on a model that takes into account nonlinear spin dynamics and linear temperature-dependent detuning effects.

BibTeX:

@article{IMEDEA_intranet:603,

  author = {M. Sondermann and M. Weinkath and T. Ackemann and J. Mulet and S. Balle},

  title = {Two-frequency emission and polarization dynamics at lasing threshold in vertical-cavity surface-emitting lasers},

  journal = {Physical Review A - Atomic, Molecular, and Optical Physics},

  year = {2003},

  volume = {68},

  pages = {033822},

  url = {http://www.imedea.uib.es/pub_download.php?id=603}

}

Cara, M.; Balle, S. & Occhi, L. Modeling and measurement of the wavelength dependent output properties of quantum-well optical amplifiers 2003 IEEE Journal of Selected Topics in Quantum Electronics
Vol. 9, pp. 783-787 
article URL 
Abstract:

We present a model for quantum-well (QW) semiconductor
optical amplifiers (SOAs) that considers bidirectional field
propagation and the carrier densities in the barrier and QW regions.
Carrier capture from the barriers into the QWs and carrier
escape from the QWs to the barriers are included by means
of effective capture and escape times. The model incorporates the
wavelength dependence of the optical response of the active region
and the effects of spectral hole burning via an analytical approximation
to the susceptibility of the active material, which allows
one to very effectively include the wavelength dependence of the
output properties of the SOA. The model is used to analyze the
experimental results obtained for a multiquantum-well SOA. The
simulations results show a good agreement with the experimental
data when a carrier-density dependent escape time from the QW
to the barrier regions is considered.

BibTeX:

@article{IMEDEA_intranet:604,

  author = {M. Cara and S. Balle and L. Occhi},

  title = {Modeling and measurement of the wavelength dependent output properties of quantum-well optical amplifiers},

  journal = {IEEE Journal of Selected Topics in Quantum Electronics},

  year = {2003},

  volume = {9},

  pages = {783--787},

  url = {http://www.imedea.uib.es/pub_download.php?id=604}

}

Javaloyes, J.; Lippi, G. L. & Politi, A. Reduced model for the description of radiation-matter interaction including atomic recoil 2003 Phys. Rev. A
Vol. 68, pp. 033405 
article DOI URL 
BibTeX:

@article{PhysRevA.68.033405,

  author = {Javaloyes, J. and Lippi, G. L. and Politi, A.},

  title = {Reduced model for the description of radiation-matter interaction including atomic recoil},

  journal = {Phys. Rev. A},

  publisher = {American Physical Society},

  year = {2003},

  volume = {68},

  pages = {033405},

  url = {http://link.aps.org/doi/10.1103/PhysRevA.68.033405},

  doi = {http://dx.doi.org/10.1103/PhysRevA.68.033405}

}

Javaloyes, J.; Mandel, Paul & Pieroux, D. Dynamical properties of lasers coupled face to face 2003 Phys. Rev. E
Vol. 67, pp. 036201 
article DOI URL 
BibTeX:

@article{PhysRevE.67.036201,

  author = {Javaloyes, J. and Mandel, Paul and Pieroux, D.},

  title = {Dynamical properties of lasers coupled face to face},

  journal = {Phys. Rev. E},

  publisher = {American Physical Society},

  year = {2003},

  volume = {67},

  pages = {036201},

  url = {http://link.aps.org/doi/10.1103/PhysRevE.67.036201},

  doi = {http://dx.doi.org/10.1103/PhysRevE.67.036201}

}

Balle, S. Analytical description of spectral hole-burning effects in active semiconductors 2002 Optics Letters
Vol. 27(21), pp. 1923-1925 
article DOI URL 
Abstract:

An analytical approximation of the effects of spectral hole burning on the optical properties of active semiconductor materials was developed. Four-wave mixing effects and nonlinear gain compression were also discussed. It was found that the approximation presented provided a numerically efficient way of describing gain saturation and four-wave mixing in the optical response of a medium.

BibTeX:

@article{IMEDEA_intranet:10591,

  author = {Balle, S.},

  title = {Analytical description of spectral hole-burning effects in active semiconductors},

  journal = {Optics Letters},

  year = {2002},

  volume = {27},

  number = {21},

  pages = {1923--1925},

  url = {http://www.imedea.uib.es/pub_download.php?id=10591},

  doi = {http://dx.doi.org/10.1364/OL.27.001923}

}

Cartwright, Julyan H. E.; González, Diego L.; Piro, Oreste & Stanzial, Domenico. Aesthetics, dynamics, and muscial scales: A golden connection. 2002 Journal of New Music Research
Vol. 31, pp. 51-58 
article URL 
Abstract:

 

Pick a preprint HERE.

BibTeX:

@article{IMEDEA_intranet:414,

  author = {Cartwright, Julyan H. E. and González, Diego L. and Piro, Oreste and Stanzial, Domenico.},

  title = {Aesthetics, dynamics, and muscial scales: A golden connection.},

  journal = {Journal of New Music Research},

  year = {2002},

  volume = {31},

  pages = {51--58},

  url = {http://www.imedea.uib.es/pub_download.php?id=414}

}

Chialvo, Dante R.; Calvo, Oscar; Gonzalez, Diego L.; Piro, Oreste & Savino, Guillermo V. Subharmonic stochastic synchronization and resonance in neuronal systems. 2002 invalid journal
Vol. 65, pp. 050902(R)(1-4) 
article URL 
Abstract:

 

Pick a preprint HERE.

BibTeX:

@article{IMEDEA_intranet:424,

  author = {Chialvo, Dante R. and Calvo, Oscar and Gonzalez, Diego L. and Piro, Oreste and Savino, Guillermo V.},

  title = {Subharmonic stochastic synchronization and resonance in neuronal systems.},

  journal = {invalid journal},

  year = {2002},

  volume = {65},

  pages = {050902(R)(1--4)},

  url = {http://www.imedea.uib.es/pub_download.php?id=424}

}

Alessandro Scire, Josep Mulet, Claudio R. Mirasso & Miguel, Maxi San Intensity and Polarization Self-Pulsations in VCSELs 2002 Optics Letters
Vol. 27, pp. 391-393 
article URL 
Abstract: We implement a dynamical model that describes the polarization behavior in VCSELs containing an absorbing region surrounding the active zone. We find four regions of qualitative different behaviors: stable linearly-polarized operation, intensity pulsations of a linearly-polarized component, pulsations of both total intensity and polarization components, and polarization self-pulsations with constant total intensity. We characterize the four regions by computing the polarization resolved optical and power spectra. The predicted scenario agrees with recent experimental results.
BibTeX:

@article{IMEDEA_intranet:430,

  author = {Alessandro Scire, Josep Mulet, Claudio R. Mirasso and Maxi San Miguel},

  title = {Intensity and Polarization Self-Pulsations in VCSELs},

  journal = {Optics Letters},

  year = {2002},

  volume = {27},

  pages = {391--393},

  url = {http://www.imedea.uib.es/pub_download.php?id=430}

}

Mulet, Josep & Balle, Salvador Spatio-Temporal Modeling of the Optical Properties of VCSELs in Presence of Polarization Effects 2002 IEEE Journal of Quantum Electronics
Vol. 38, pp. 291-305 
article URL 
Abstract:

In this paper, we develop an optical dynamical model for vertical-cavity surface-emitting lasers (VCSELs) which describes, in an unified way, polarization and spatial effects. The model is based on equations for the lateral dependence of the slowly-varying amplitudes of the optical field in both circular polarizations, and equations for the carrier density in both spin orientations. This provides a natural generalization of the Spin Flip Model for the description of polarization properties of VCSELs extensively used in the literature. In its present form, the model assumes given functional dependence of the guiding mechanisms (built-in refractive index and thermal lensing) as well as the spatial dependence of the current density. We investigate the transverse mode behavior of gain-guided, bottom and top-emitter VCSELs by implementing the model with an analytical approximation to the susceptibility of quantum-well semiconductors. We demonstrate that the stronger the thermal lens, the stronger the tendency towards multimode operation, which indicates that high lateral uniformity of the temperature is required in order to maintain single mode operation in gain-guided VCSELs. We perform analytical calculations of the threshold curves in both types of VCSELs. Also, close-to-threshold numerical simulations show that, depending on the current shape, thermal lensing strength and relative detuning, different transverse modes can be selected.

BibTeX:

@article{IMEDEA_intranet:431,

  author = {Mulet, Josep and Balle, Salvador},

  title = {Spatio-Temporal Modeling of the Optical Properties of VCSELs in Presence of Polarization Effects},

  journal = {IEEE Journal of Quantum Electronics},

  year = {2002},

  volume = {38},

  pages = {291--305},

  url = {http://www.imedea.uib.es/pub_download.php?id=431}

}

Cartwright, Julyan H. E.; Magnasco, Marcelo & Piro, Oreste Noise and Inertia-Induced Inhomogeneity in the Distribution of Small Particles in Fluid Flows 2002 Chaos
Vol. 12, pp. 489-495 
article URL 
Abstract: The dynamics of small spherical neutrally buoyant particulate impurities immersed in a two-dimensional fluid flow are known to lead to particle accumulation in the regions of the flow in which rotation dominates over shear, provided that the Stokes number of the particles is sufficiently small. If the flow is viewed as a Hamiltonian dynamical system, it can be seen that the accumulations occur in the nonchaotic parts of the phase space: the Kolmogorov--Arnold--Moser tori. This has suggested a generalization of these dynamics to Hamiltonian maps, dubbed a bailout embedding. In this paper we use a bailout embedding of the standard map to mimic the dynamics of impurities subject not only to drag but also to fluctuating forces modelled as white noise. We find that the generation of inhomogeneities associated with the separation of particle from fluid trajectories is enhanced by the presence of noise, so that they appear in much broader ranges of the Stokes number than those allowing spontaneous separation.
BibTeX:

@article{IMEDEA_intranet:443,

  author = {Cartwright, Julyan H. E. and Magnasco, Marcelo and Piro, Oreste},

  title = {Noise and Inertia-Induced Inhomogeneity in the Distribution of Small Particles in Fluid Flows},

  journal = {Chaos},

  year = {2002},

  volume = {12},

  pages = {489--495},

  url = {http://www.imedea.uib.es/pub_download.php?id=443}

}

Cartwright, Julyan H. E.; Magnasco, Marcelo & Piro, Oreste Bailout Embeddings, Targeting of KAM Orbits,and the Control of Hamiltonian Chaos 2002 invalid journal
Vol. 65, pp. 045203(R)-045207(R) 
article URL 
Abstract: We present a novel technique, which we term bailout embedding, that can be used to target orbits having particular properties out of all orbits in a flow or map. We explicitly construct a bailout embedding for Hamiltonian systems so as to target KAM orbits. We show how the bailout dynamics is able to lock onto extremely small KAM islands in an ergodic sea.
BibTeX:

@article{IMEDEA_intranet:444,

  author = {Cartwright, Julyan H. E. and Magnasco, Marcelo and Piro, Oreste},

  title = {Bailout Embeddings, Targeting of KAM Orbits,and the Control of Hamiltonian Chaos},

  journal = {invalid journal},

  year = {2002},

  volume = {65},

  pages = {045203(R)--045207(R)},

  url = {http://www.imedea.uib.es/pub_download.php?id=444}

}

Valle, Angel; Mulet, Josep; Pesquera, Luis & Balle, Salvador Diffusive turn-off transients in current modulated multitransverse mode VCSELs 2002 Proceedings of the SPIE(4649), pp. 50-62  inproceedings URL 
Abstract:

Secondary pulsations are an example of diffusive turn-off transients that can limit the performance of VCSELs in optical communication systems. Secondary pulsations are firstly analysed by using a model where a modal expansion of the electric field is performed. The maximum power of the secondary pulsations and the time at which they appear fluctuate when the spontaneous emission noise is present. A linear relation between the two previous quantities for each individual turn-off event is found. In the single-mode regime, the averaged maximum power during turn-off transients increases when increasing the injection current. However, in the multi-mode regime, the strength of secondary pulsations decreases when increasing the current. Secondary pulsations are also analysed by using a spatio-temporal description of the VCSEL dynamics, where the modal profiles are determined from the distribution of injected carriers and the thermal lens. This model also incorporates polarization effects and a frequency-dependent susceptibility. In this model, the carrier-induced refractive index changes increase the strength of secondary pulsations as compared to that obtained with the modal expansion. It is also shown that the use of ring-shaped electrical contact enhances the strength of secondary pulsations, while it decreases when multi-transverse mode operation is present.

BibTeX:

@inproceedings{IMEDEA_intranet:482,

  author = {Valle, Angel and Mulet, Josep and Pesquera, Luis and Balle, Salvador},

  title = {Diffusive turn-off transients in current modulated multitransverse mode VCSELs},

  journal = {Proceedings of the SPIE},

  year = {2002},

  number = {4649},

  pages = {50--62},

  url = {http://www.imedea.uib.es/pub_download.php?id=482}

}

Scirè, Alessandro; Mulet, Josep; Mirasso, Claudio & San Miguel, Maxi Intensity and Polarization Self-Pulsations in VCSELs 2002 invalid journal  article URL 
BibTeX:

@article{IMEDEA_intranet:487,

  author = {Scirè, Alessandro and Mulet, Josep and Mirasso, Claudio and San Miguel, Maxi},

  title = {Intensity and Polarization Self-Pulsations in VCSELs},

  journal = {invalid journal},

  year = {2002},

  url = {http://www.imedea.uib.es/pub_download.php?id=487}

}

Scirè, Alessandro; Mulet, Josep; Mirasso, Claudio R.; Danckaert, Jan & San Miguel, Maxi Vectorial Chaos Synchronization and Polarization Encoding in Self-Pulsating VCSELs 2002 invalid journal  article URL 
BibTeX:

@article{IMEDEA_intranet:488,

  author = {Scirè, Alessandro and Mulet, Josep and Mirasso, Claudio R. and Danckaert, Jan and San Miguel, Maxi},

  title = {Vectorial Chaos Synchronization and Polarization Encoding in Self-Pulsating VCSELs},

  journal = {invalid journal},

  year = {2002},

  url = {http://www.imedea.uib.es/pub_download.php?id=488}

}

F., Marino; M., Giudici; S., Barland & S., Balle Experimental Evidence of Stochastic Resonance in an Excitable Optical System 2002 Physical Review Letters
Vol. 88, pp. 040601 
article URL 
Abstract:

Experimental evidence of stochastic resonance in an excitable optical system is reported. We apply
a sinusoidal forcing to the system and, for a finite external noise level, we find a frequency for which
the excitable pulsing occurs periodically at the frequency imposed by the modulation. This resonant
frequency matches the inverse of the average escape time of the stochastically driven system (i.e., without
forcing). The same resonance is found by varying the noise level for fixed forcing frequencies. We
discuss different indicators in order to describe quantitatively the degree of resonance.

BibTeX:

@article{IMEDEA_intranet:516,

  author = {Marino F. and Giudici M. and Barland S. and Balle S.},

  title = {Experimental Evidence of Stochastic Resonance in an Excitable Optical System},

  journal = {Physical Review Letters},

  year = {2002},

  volume = {88},

  pages = {040601},

  url = {http://www.imedea.uib.es/pub_download.php?id=516}

}

Mulet, Josep & Balle, Salvador Transverse mode dynamics in VCSELs: Spatiotemporal versus modal expansion descriptions 2002 Physical Review A - Atomic, Molecular, and Optical Physics
Vol. 66, pp. 053802 
article URL 
Abstract:

We discuss the range of validity of a modal description for the spatiotemporal dynamics of the optical field in vertical-cavity surface-emitting lasers (VCSELs). We focus on the secondary pulsations that appear during the turn-off transients when the injection current is modulated by a square-wave signal. We compare the results obtained with both a full spatiotemporal model and a modal expansion derived from this model. We find that the results obtained from the two descriptions agree for strong lateral guiding. However, for weak lateral guiding we find differences because the optical field profile changes significantly due to spatial changes in refractive index induced by the carrier density. The reason is that in the full spatiotemporal model a shrinkage of the mode profile occurs which leads to an enhancement of the secondary pulsations. This effect is not included in the modal expansion, and it determines the limits of validity of such an approach for gain-guided devices.

BibTeX:

@article{IMEDEA_intranet:528,

  author = {Mulet, Josep and Balle, Salvador},

  title = {Transverse mode dynamics in VCSELs: Spatiotemporal versus modal expansion descriptions},

  journal = {Physical Review A - Atomic, Molecular, and Optical Physics},

  year = {2002},

  volume = {66},

  pages = {053802},

  url = {http://www.imedea.uib.es/pub_download.php?id=528}

}

Sorel, M; Scire, A; Giuliani, G; Miglierina, R; Balle, S; Laybourn, P & Donati, S Alternate Oscillations in Semiconductor Ring Lasers 2002 Optics Letters
Vol. 27, pp. 1992-1994 
article URL 
Abstract:

We report on fabrication and characterization of single-longitudinal- and transverse-mode semiconductor ring
lasers. A bifurcation from bidirectional stable operation to a regime with alternate oscillations of the counterpropagating
modes was observed experimentally and is theoretically explained through a two-mode model.
Analytical expressions for the onset and the frequency of the oscillations are derived, and L I curves numerically
evaluated. Good quantitative agreement between theory and measurements made over a large number
of tested devices is obtained.

BibTeX:

@article{IMEDEA_intranet:545,

  author = {Sorel, M and Scire, A and Giuliani, G and Miglierina, R and Balle, S and Laybourn, P and Donati, S},

  title = {Alternate Oscillations in Semiconductor Ring Lasers},

  journal = {Optics Letters},

  year = {2002},

  volume = {27},

  pages = {1992--1994},

  url = {http://www.imedea.uib.es/pub_download.php?id=545}

}

V. Annovazzi-Lodi, S.Merlo, M. Norgia & Scire, A. Characterization of Chaotic Telecommunication Lasers for Different Fiber Cavity Lengths 2002 IEEE Journal of Quantum Electronics
Vol. 38, pp. 1171-1177 
article URL 
BibTeX:

@article{IMEDEA_intranet:546,

  author = {V. Annovazzi-Lodi, S.Merlo, M. Norgia and A. Scire},

  title = {Characterization of Chaotic Telecommunication Lasers for Different Fiber Cavity Lengths},

  journal = {IEEE Journal of Quantum Electronics},

  year = {2002},

  volume = {38},

  pages = {1171--1177},

  url = {http://www.imedea.uib.es/pub_download.php?id=546}

}

Neufeld, Zoltan; Lopez, Cristobal; Hernandez-Garcia, Emilio & Piro, Oreste Excitable media in open and closed chaotic flows 2002 Physical Review E - Statistical, Nonlinear, and Soft Matter Physics
Vol. 66, pp. 066208(1-12) 
article URL 
Abstract: We investigate the response of an excitable medium to a localized perturbation in the presence of a two-dimensional smooth chaotic flow. Two distinct types of flows are numerically considered: open and closed. For both of them three distinct regimes are found, depending on the relative strengths of the stirring and the rate of the excitable reaction. In order to clarify and understand the role of the many competing mechanisms present, simplified models of the process are introduced. They are one-dimensional baker-map models for the flow and a one-dimensional approximation for the transverse profile of the filaments.

Also available as arXiv preprint nlin.CD/02090024.

BibTeX:

@article{IMEDEA_intranet:571,

  author = {Neufeld, Zoltan and Lopez, Cristobal and Hernandez-Garcia, Emilio and Piro, Oreste},

  title = {Excitable media in open and closed chaotic flows},

  journal = {Physical Review E - Statistical, Nonlinear, and Soft Matter Physics},

  year = {2002},

  volume = {66},

  pages = {066208(1--12)},

  url = {http://www.imedea.uib.es/pub_download.php?id=571}

}

Yacomotti, A.M.; Mindlin, G.B.; Giudici, M.; Balle, S.; Barland, S. & Tredicce, J. Coupled optical excitable cells 2002 Physical Review E - Statistical, Nonlinear, and Soft Matter Physics
Vol. 66, pp. 036227 
article URL 
Abstract:

In this work we investigate experimentally the dynamics of two coupled optical excitable cells, namely, two semiconductor lasers with optical feedback. We analyze the dynamics observed in terms of the statistical properties of the time series and in terms of the phase space reconstruction from the data. We build a model based on a simple set of deterministic equations (on a two torus) plus noise in order to capture the essential features of the dynamics observed. We discuss the validity of our theoretical results in terms of families of excitable systems and coupling terms

BibTeX:

@article{IMEDEA_intranet:575,

  author = {Yacomotti, A.M. and Mindlin, G.B. and Giudici, M. and Balle, S. and Barland, S. and Tredicce, J.},

  title = {Coupled optical excitable cells},

  journal = {Physical Review E - Statistical, Nonlinear, and Soft Matter Physics},

  year = {2002},

  volume = {66},

  pages = {036227},

  url = {http://www.imedea.uib.es/pub_download.php?id=575}

}

Julyan H. E. Cartwright, Oreste Piro, Ana I. Villacampa Pattern formation in solutal convection: vermiculated rolls and isolated cells. 2002 Physica A
Vol. 314, pp. 291-298 
article URL 
BibTeX:

@article{IMEDEA_intranet:584,

  author = {Julyan H. E. Cartwright, Oreste Piro, Ana I. Villacampa},

  title = {Pattern formation in solutal convection: vermiculated rolls and isolated cells.},

  journal = {Physica A},

  year = {2002},

  volume = {314},

  pages = {291--298},

  url = {http://www.imedea.uib.es/pub_download.php?id=584}

}

Barland, S.; Tredicce, J.R.; Brambilla, M.; Lugiato, L.A.; Balle, S.; Giudici, M.; Maggipinto, T.; Spinelli, L.; Tissoni, G.; Knoedl, T. & Miller, M. Cavity solitons as pixels in semiconductor microresonators 2002 Nature
Vol. 419, pp. 699-702 
article URL 
Abstract:

Cavity solitons are localized intensity peaks that can form in a
homogeneous background of radiation. They are generated by
shining laser pulses into optical cavities that contain a nonlinear
medium driven by a coherent field (holding beam). The ability to
switch cavity solitons on and off and to control their location
and motion by applying laser pulses makes them interesting as
potential ‘pixels’ for reconfigurable arrays or all-optical processing
units. Theoretical work on cavity solitons has stimulated a
variety of experiments in macroscopic cavities and in systems
with optical feedback. But for practical devices, it is desirable
to generate cavity solitons in semiconductor structures, which
would allow fast response and miniaturization. The existence of
cavity solitons in semiconductor microcavities has been predicted
theoretically, and precursors of cavity solitons have
been observed, but clear experimental realization has been
hindered by boundary-dependence of the resulting optical patterns —cavity solitons should be self-confined. Here we
demonstrate the generation of cavity solitons in vertical cavity
semiconductor microresonators that are electrically pumped
above transparency but slightly below lasing threshold. We
show that the generated optical spots can be written, erased
and manipulated as objects independent of each other and of the
boundary. Numerical simulations allow for a clearer interpretation
of experimental results.

BibTeX:

@article{IMEDEA_intranet:600,

  author = {S. Barland and J.R. Tredicce and M. Brambilla and L.A. Lugiato and S. Balle and M. Giudici and T. Maggipinto and L. Spinelli and G. Tissoni and T. Knoedl and M. Miller},

  title = {Cavity solitons as pixels in semiconductor microresonators},

  journal = {Nature},

  year = {2002},

  volume = {419},

  pages = {699--702},

  url = {http://www.imedea.uib.es/pub_download.php?id=600}

}

Lopez, Cristobal; Hernandez-Garcia, Emilio; Piro, Oreste; Vulpiani, Angelo & Zambianchi, Enrico Population dynamics advected by chaotic flows: a discrete-time map approach. 2001 Chaos
Vol. 11, pp. 397-403 
article URL 
Abstract: A discrete-time model of reacting evolving
fields, transported by a bidimensional chaotic fluid flow, is
studied. Our approach is based on the use of a Lagrangian scheme
where it fluid particles are advected by a 2d symplectic map
possibly yielding Lagrangian chaos. Each it fluid particle
carries concentrations of active substances which evolve according
to its own reaction dynamics. This evolution is also
modeled in terms of maps. Motivated by the question, of relevance
in marine ecology, of how a localized distribution of nutrients or
preys affects the spatial structure of predators transported by a
fluid flow, we study a specific model in
which the population dynamics is given by a logistic map with
space-dependent coefficient, and advection is given by the
standard map. Fractal and random patterns in the Eulerian spatial
concentration of predators are obtained under different
conditions. Exploiting the analogies of this coupled-map
(advection plus reaction) system with a random map, some features
of these patterns are discussed.

This directory contains the paper files.
BibTeX:

@article{IMEDEA_intranet:388,

  author = {Lopez, Cristobal and Hernandez-Garcia, Emilio and Piro, Oreste and Vulpiani, Angelo and Zambianchi, Enrico},

  title = {Population dynamics advected by chaotic flows: a discrete-time map approach.},

  journal = {Chaos},

  year = {2001},

  volume = {11},

  pages = {397--403},

  url = {http://www.imedea.uib.es/pub_download.php?id=388}

}

Sendi na-Nadal, Irene; Pérez-Mu nuzuri, Vicente; Eguíluz, Víctor M.; Hernández-García, Emilio & Oreste, Piro Quasiperiodic Patterns in Boundary-Modulated Excitable Waves 2001 Physical Review E - Statistical, Nonlinear, and Soft Matter Physics
Vol. 64, pp. 046208 (1-5) 
article URL 
Abstract: We investigate the impact of the domain shape on wave propagation in excitable media.
Channelled domains with sinusoidal boundaries are considered. Trains of fronts generated
periodically at an extreme of the channel are found to adopt a quasiperiodic spatial configuration
stroboscopically frozen in time. The phenomenon is studied in a model for the photo-sensitive
Belousov-Zabotinsky reaction, but we give a theoretical derivation of the spatial return maps
prescribing the height and position of the successive fronts that is valid for arbitrary excitable
reaction-diffusion systems.

The paper can be obtained LOCALLY
or from LANL preprint server as paper nlin.PS/0010047
BibTeX:

@article{IMEDEA_intranet:396,

  author = {Sendiña-Nadal, Irene and Pérez-Muñuzuri, Vicente and Eguíluz, Víctor M. and Hernández-García, Emilio and Oreste, Piro},

  title = {Quasiperiodic Patterns in Boundary-Modulated Excitable Waves},

  journal = {Physical Review E - Statistical, Nonlinear, and Soft Matter Physics},

  year = {2001},

  volume = {64},

  pages = {046208 (1--5)},

  url = {http://www.imedea.uib.es/pub_download.php?id=396}

}

Toral, Raúl; Mirasso, Claudio; Hernández-García, Emilio & Piro, Oreste Analytical and Numerical Studies of Noise-induced Synchronization of Chaotic Systems 2001 Chaos
Vol. 11, pp. 665-673 
article URL 
Abstract: We study the effect that the injection of a common source of noise
has on the trajectories of chaotic systems, addressing some
contradictory results present in the literature. We present
particular examples of 1-d maps and the Lorenz system, both in the
chaotic region, and give numerical evidence showing that the
addition of a common noise to different trajectories, which start
from different initial conditions, leads eventually to their
perfect synchronization. When synchronization occurs, the largest
Lyapunov exponent becomes negative. For a simple map we are able
to show this phenomenon analytically. Finally, we analyze the
structural stability of the phenomenon.

The files of the paper are here.

 

BibTeX:

@article{IMEDEA_intranet:399,

  author = {Toral, Raúl and Mirasso, Claudio and Hernández-García, Emilio and Piro, Oreste},

  title = {Analytical and Numerical Studies of Noise-induced Synchronization of Chaotic Systems},

  journal = {Chaos},

  year = {2001},

  volume = {11},

  pages = {665--673},

  url = {http://www.imedea.uib.es/pub_download.php?id=399}

}

Mulet, J.; Mirasso, C.R.; Balle, S. & San Miguel, M. Transverse and Polarization Mode Selection in VCSELs 2001 Proceedings of the SPIE
Vol. 4283(4283), pp. 139-149 
inproceedings URL 
Abstract:

We develop a mesoscopic model of semiconductor dynamics for
vertical-cavity surface-emitting lasers which allows us to
describe polarization and transverse mode dynamics simultaneously.
Within this model, we study the selection processes and the turn-on delay for the
switch-on of different transverse modes in gain-guided VCSELs. We consider
different active-region diameters, excitation conditions and current shapes.
Following the application of the current pulse, transverse modes become excited in
a quite definite sequence. After the turn-on, the VCSEL initially switches-on in
the fundamental transverse mode, but higher-order transverse modes
become excited later. In general, the results obtained are in
qualitative agreement with experiments reported recently. Finally, we discuss
the current shape dependence on the transverse mode selection at threshold.

BibTeX:

@inproceedings{IMEDEA_intranet:402,

  author = {Mulet, J. and Mirasso, C.R. and Balle, S. and San Miguel, M.},

  title = {Transverse and Polarization Mode Selection in VCSELs},

  journal = {Proceedings of the SPIE},

  year = {2001},

  volume = {4283},

  number = {4283},

  pages = {139--149},

  url = {http://www.imedea.uib.es/pub_download.php?id=402}

}

Eguiluz, Victor M.; Hernandez-Garcia, Emilio & Piro, Oreste Complex Ginzburg-Landau Equation in the Presence of Walls and Corners 2001 Physical Review E - Statistical, Nonlinear, and Soft Matter Physics
Vol. 64, pp. 036205 (1-10) 
article URL 
Abstract: We investigate the influence of walls and corners (with Dirichlet
and Neumann boundary conditions) in the evolution of
twodimensional autooscillating fields described by the Complex
Ginzburg-Landau equation. Analytical solutions are found, and
arguments provided, to show that Dirichlet walls introduce strong
selection mechanisms for the wave pattern. Corners between walls
provide additional synchronization mechanisms and associated
selection criteria. The numerical results fit well with the
theoretical predictions in the parameter range studied.

 

The files can be found HERE, and there are related MOVIES

BibTeX:

@article{IMEDEA_intranet:409,

  author = {Eguiluz, Victor M. and Hernandez-Garcia, Emilio and Piro, Oreste},

  title = {Complex Ginzburg-Landau Equation in the Presence of Walls and Corners},

  journal = {Physical Review E - Statistical, Nonlinear, and Soft Matter Physics},

  year = {2001},

  volume = {64},

  pages = {036205 (1--10)},

  url = {http://www.imedea.uib.es/pub_download.php?id=409}

}

Cartwright, Julyan H. E.; González, Diego L. & Piro, Oreste Pitch perception: A dynamical perspective. 2001 Proceedings of the National Academy of Sciences of the United States of America
Vol. 98, pp. 4855-4859 
article URL 
Abstract:

 

Pick a preprint HERE.

BibTeX:

@article{IMEDEA_intranet:413,

  author = {Cartwright, Julyan H. E. and González, Diego L. and Piro, Oreste},

  title = {Pitch perception: A dynamical perspective.},

  journal = {Proceedings of the National Academy of Sciences of the United States of America},

  year = {2001},

  volume = {98},

  pages = {4855--4859},

  url = {http://www.imedea.uib.es/pub_download.php?id=413}

}

Duarte, C.M. y O. Piro. Interdisciplinary Challenges and Bottlenecks in the Aquatic Sciences. 2001 invalid journal
Vol. 10, pp. 57-61 
article URL 
BibTeX:

@article{IMEDEA_intranet:569,

  author = {Duarte, C.M. y O. Piro.},

  title = {Interdisciplinary Challenges and Bottlenecks in the Aquatic Sciences.},

  journal = {invalid journal},

  year = {2001},

  volume = {10},

  pages = {57--61},

  url = {http://www.imedea.uib.es/pub_download.php?id=569}

}

Perrin, Mathias; Ye, Zongxiong; Javaloyes, Julien; Lippi, Gian Luca; Politi, Antonio & Narducci, Lorenzo M. Collective light-matter interaction in the presence of atomic recoil 2001 Optics & Photonics News
Vol. 12(12), pp. 60-60 
article URL 
BibTeX:

@article{perrin:60,

  author = {Mathias Perrin and Zongxiong Ye and Julien Javaloyes and Gian Luca Lippi and Antonio Politi and Lorenzo M. Narducci},

  title = {Collective light-matter interaction in the presence of atomic recoil},

  journal = {Optics & Photonics News},

  publisher = {OSA},

  year = {2001},

  volume = {12},

  number = {12},

  pages = {60-60},

  url = {http://www.opticsinfobase.org/abstract.cfm?URI=OPN-12-12-60}

}

Ackemann, T.; Barland, S; Cara, M; Balle, S; Tredicce, J.; Jäger, R; Grabherr, M.; Miller, M & Ebeling, K. J. Spatial mode structure of bottom-emitting broad-area vertical-cavity surface-emitting lasers 2000 Journal of Optics B-Quantum and Semiclassical Optics
Vol. 2, pp. 406-412 
article URL 
Abstract:

The spatial mode structure of circular broad-area bottom-emitting vertical-cavity
surface-emitting lasers is investigated close to threshold. The devices display very high-order
flower-like Laguerre modes as well as structures with a Cartesian symmetry in spite of the
original O(2) symmetry. In some cases the latter resemble tilted waves more than
Hermite–Gaussian modes. Spatial structures appear for both sides of the detuning between
the gain peak and the cavity resonance. The results indicate the necessity to refine the
theoretical models to include realistic boundary conditions and inhomogeneities.

BibTeX:

@article{IMEDEA_intranet:10590,

  author = {Ackemann, T. and Barland, S and Cara, M and Balle, S and Tredicce, J. and Jäger, R and Grabherr, M. and Miller, M and Ebeling, K. J.},

  title = {Spatial mode structure of bottom-emitting broad-area vertical-cavity surface-emitting lasers},

  journal = {Journal of Optics B-Quantum and Semiclassical Optics},

  year = {2000},

  volume = {2},

  pages = {406--412},

  url = {http://www.imedea.uib.es/pub_download.php?id=10590}

}

Raul Toral, Claudio R. Mirasso, E. Hernandez-Garcia & Piro, Oreste Synchronization of Chaotic Systems by Common Random Forcing 2000 invalid journal, pp. 255-262  article URL 
Abstract: Paper.ps.gz
BibTeX:

@article{IMEDEA_intranet:315,

  author = {Raul Toral, Claudio R. Mirasso,E. Hernandez-Garcia and Oreste Piro},

  title = {Synchronization of Chaotic Systems by Common Random Forcing},

  journal = {invalid journal},

  year = {2000},

  pages = {255--262},

  url = {http://www.imedea.uib.es/pub_download.php?id=315}

}

M. G. Zimmermann, R. Toral, O. Piro M. San Miguel Stochastic Spatiotemporal Intermittency and Noise-Induced Transition to an Absorbing Phase 2000 Physical Review Letters
Vol. 85, pp. 3612-3615 
article URL 
Abstract: We introduce a stochastic partial differential equation capable
of reproducing the main features of spatiotemporal
intermittency (STI). Additionally the model displays a noise
induced transition from laminarity to the STI regime. We show by
numerical simulations and a mean-field analysis that for high
noise intensities the system globally evolves to a uniform
absorbing phase, while for noise intensities below a critical
value spatiotemporal intermittence dominates. A quantitative
computation of the loci of this transition in the relevant
parameter space is presented.
 
BibTeX:

@article{IMEDEA_intranet:340,

  author = {M. G. Zimmermann, R. Toral, O. Piro, M. San Miguel},

  title = {Stochastic Spatiotemporal Intermittency and Noise-Induced Transition to an Absorbing Phase},

  journal = {Physical Review Letters},

  year = {2000},

  volume = {85},

  pages = {3612--3615},

  url = {http://www.imedea.uib.es/pub_download.php?id=340}

}

Eguiluz, Victor M.; Hernandez-Garcia, Emilio & Piro, Oreste Boundary effects in extended dynamical systems 2000 Physica A
Vol. 283, pp. 48-51 
article URL 
Abstract: This is a contribution submitted to the proceedigs of LAWNP99
(Physica A).
HERE you will find the ABSTRACT, the three postscript files,
the TeX file, and the
full paper including figures.
BibTeX:

@article{IMEDEA_intranet:353,

  author = {Eguiluz, Victor M. and Hernandez-Garcia, Emilio and Piro, Oreste},

  title = {Boundary effects in extended dynamical systems},

  journal = {Physica A},

  year = {2000},

  volume = {283},

  pages = {48--51},

  url = {http://www.imedea.uib.es/pub_download.php?id=353}

}

San Miguel, M.; Balle, S.; Mulet, J.; Mirasso, C.R.; Tolkachova, E. & Tredicce, J.R. Combined effects of semiconductor gain dynamics, spin dynamics and thermal shift in polarization selection in VCSELs 2000 Proceedings of the SPIE
Vol. 3944(3944), pp. 242-251 
inproceedings DOI URL 
Abstract:

Combined effects of semiconductor gain dynamics, spin dynamics and thermal shift in polarization selection in VCSELs

BibTeX:

@inproceedings{IMEDEA_intranet:356,

  author = {San Miguel, M. and Balle, S. and Mulet, J. and Mirasso, C.R. and Tolkachova, E. and Tredicce, J.R.},

  title = {Combined effects of semiconductor gain dynamics, spin dynamics and thermal shift in polarization selection in VCSELs},

  journal = {Proceedings of the SPIE},

  year = {2000},

  volume = {3944},

  number = {3944},

  pages = {242--251},

  url = {http://www.imedea.uib.es/pub_download.php?id=356},

  doi = {http://link.aip.org/link/doi/10.1117/12.391426}

}

Giacomelli, G.; Giudici, M.; Balle, S. & Tredicce, J. R. Experimental evidence of coherence resonance in an optical system 2000 Physical Review Letters
Vol. 84, pp. 3298-3301 
article URL 
Abstract:

Experimental evidence of it Coherence Resonance in an optical system is reported.
We show that the regularity of the excitable pulses in the intensity of a laser
diode with optical feedback increases when adding noise, up to an optimal value of
the noise strength. Both phase and amplitude fluctuations of the pulses play a
relevant role in the dynamics of the system. We introduce the joint entropy of the
two variables to generalize the indicator of coherence, and we put in evidence the
mechanism of destruction of the excitable orbit after the resonance.

ps file, 580 kB

BibTeX:

@article{IMEDEA_intranet:364,

  author = {Giacomelli, G. and Giudici, M. and Balle, S. and Tredicce, J. R.},

  title = {Experimental evidence of coherence resonance in an optical system},

  journal = {Physical Review Letters},

  year = {2000},

  volume = {84},

  pages = {3298--3301},

  url = {http://www.imedea.uib.es/pub_download.php?id=364}

}

Calvo, O.; Cartwright, J.H.E.; González, D.L.; Piro, O. & Sportolari, F. Three-Frequency Resonances in Coupled phase-Locked Loops 2000 invalid journal
Vol. 47, pp. 491-497 
article URL 
Abstract:

 

Pick a preprint HERE.

BibTeX:

@article{IMEDEA_intranet:369,

  author = {Calvo, O. and Cartwright, J.H.E. and González, D.L. and Piro, O. and Sportolari, F.},

  title = {Three-Frequency Resonances in Coupled phase-Locked Loops},

  journal = {invalid journal},

  year = {2000},

  volume = {47},

  pages = {491--497},

  url = {http://www.imedea.uib.es/pub_download.php?id=369}

}

Babiano, Armando; Cartwright, Julyan H. E.; Piro, Oreste & Provenzale, Antonello Dynamics of a Small Neutrally Buoyant Sphere in a Fluid and Targeting in Hamiltonian Systems 2000 Physical Review Letters
Vol. 84, pp. 5764-5767 
article URL 
Abstract: We show that, even in the most favorable case, the motion of a small spherical tracer suspended in
a fluid of the same density may differ from the corresponding motion of an ideal passive particle. We
demonstrate furthermore how its dynamics may be applied to target trajectories in Hamiltonian systems.
BibTeX:

@article{IMEDEA_intranet:382,

  author = {Babiano, Armando and Cartwright, Julyan H. E. and Piro, Oreste and Provenzale, Antonello},

  title = {Dynamics of a Small Neutrally Buoyant Sphere in a Fluid and Targeting in Hamiltonian Systems},

  journal = {Physical Review Letters},

  year = {2000},

  volume = {84},

  pages = {5764--5767},

  url = {http://www.imedea.uib.es/pub_download.php?id=382}

}

Ackemann, T.; Barland, S.; Tredicce, J. R.; Cara, M.; Balle, S. & Jager, R. Spatial structure of broad-area vertical-cavity regenerative amplifiers 2000 Optics Letters
Vol. 25, pp. 814-816 
article URL 
Abstract:

We investigate the spatial structure of broad-area vertical-cavity regenerative amplif iers injected with a
homogeneous beam. The emerging patterns have a predominantly sixfold rotational symmetry, verifying
the recent prediction of formation of hexagons. The length scale is controllable by means of detuning and
follows the prediction for tilted waves.

BibTeX:

@article{IMEDEA_intranet:407,

  author = {Ackemann, T. and Barland, S. and Tredicce, J. R. and Cara, M. and Balle, S. and Jager, R. },

  title = {Spatial structure of broad-area vertical-cavity regenerative amplifiers},

  journal = {Optics Letters},

  year = {2000},

  volume = {25},

  pages = {814--816},

  url = {http://www.imedea.uib.es/pub_download.php?id=407}

}

Ackemann, T.; Barland, S.; Giudici, M.; Tredicce, J.; Balle, S.; Jaeger, R.; Grabherr, M.; Miller, M. & Ebeling, K.J. Patterns in Broad-Area Microcavities 2000 Physica Status Solidi (B): Basic Research
Vol. 221, pp. 133-136 
article URL 
Abstract:

The emergence of spatial structures with an approximate hexagonal symmetry is observed in broad-area amplifying microcavities with injection of a homogeneous beam. The length scale is controllable via detuning. Optical bistability occurs close to the longitudinal resonance.

BibTeX:

@article{IMEDEA_intranet:539,

  author = {Ackemann, T. and Barland, S. and Giudici, M. and Tredicce, J. and Balle, S. and Jaeger, R. and Grabherr, M. and Miller, M. and Ebeling, K.J.},

  title = {Patterns in Broad-Area Microcavities},

  journal = {Physica Status Solidi (B): Basic Research},

  year = {2000},

  volume = {221},

  pages = {133--136},

  url = {http://www.imedea.uib.es/pub_download.php?id=539}

}

Cartwright, J. H. E.; Feingold, M. & Piro, O. An Introduction to Chaotic Advection 1999 invalid journal, pp. 307-342  article URL 
BibTeX:

@article{IMEDEA_intranet:254,

  author = {Cartwright, J. H. E. and Feingold, M. and Piro, O.},

  title = {An Introduction to Chaotic Advection},

  journal = {invalid journal},

  year = {1999},

  pages = {307--342},

  url = {http://www.imedea.uib.es/pub_download.php?id=254}

}

Gahl, A; Balle, S & San Miguel, M Polarization Dynamics of Optically Pumped VCSELs 1999 IEEE Journal of Quantum Electronics
Vol. 35, pp. 342-351 
article URL 
Abstract:

We consider the polarization dynamics of optically pumped vertical--cavity
surface--emitting lasers (VCSELs) with a pump light of arbitrary polarization
ellipticity. We also consider the effect of an applied transverse
magnetic field on the polarization properties of the output light. We first
test our theoretical description by analyzing the polarization state of the
photoluminescence light emitted by an optically pumped quantum well, and
discuss a variety of phenomena known to be originated by spin carrier dynamics
in these materials.
We discuss how these phenomena are modified when a VCSEL is operated
above threshold and we show that our model gives a good description of Larmor
oscillations observed in VCSELs excited with short optical pulses.
For VCSELs under continuous optical pump we find a number of accessible
experimental situations in which self-sustained polarization oscillations in
the emitted light are possible. We identify and analyze three different
mechanisms for these oscillations to occur. When no
magnetic field is applied we find polarization oscillations governed by
birefringence, and undamped polarization oscillations at the relaxation
oscillation frequency. With an applied magnetic field
we find self-sustained oscillations governed by the Larmor frequency. In
addition our study of optically pumped VCSELs makes apparent the effects of
spin carrier dynamics in the polarization properties of the emitted light.
ps file, 670 kB

BibTeX:

@article{IMEDEA_intranet:296,

  author = {Gahl, A and Balle, S and San Miguel, M},

  title = {Polarization Dynamics of Optically Pumped VCSELs},

  journal = {IEEE Journal of Quantum Electronics},

  year = {1999},

  volume = {35},

  pages = {342--351},

  url = {http://www.imedea.uib.es/pub_download.php?id=296}

}

Eguiluz, Victor M.; Alstrom, Preben; Hernandez-Garcia, Emilio & Piro, Oreste Average Patterns of Spatiotemporal Chaos: a Boundary Effect 1999 invalid journal
Vol. 59, pp. 2822-2825 
article URL 
Abstract: We consider time-averaged patterns obtained from the Kuramoto-Sivashinsky equation in a bounded domain. The average patterns recover global symmetries broken locally by the chaotic fluctuations. Their amplitude is strongest at the boundaries and decays with increasing distance to them. The law of decay is found and explained. The wavenumber selected by the average pattern is studied as a function of system size and the different behavior between the central and boundary regions is discussed. Most of these observations agree with experimental results in different systems, thus indicating a degree of universality in the behavior of average patterns.

More info
BibTeX:

@article{IMEDEA_intranet:298,

  author = {Eguiluz, Victor M. and Alstrom, Preben and Hernandez-Garcia, Emilio and Piro, Oreste},

  title = {Average Patterns of Spatiotemporal Chaos: a Boundary Effect},

  journal = {invalid journal},

  year = {1999},

  volume = {59},

  pages = {2822--2825},

  url = {http://www.imedea.uib.es/pub_download.php?id=298}

}

Eguiluz, Victor M.; Hernandez-Garcia, Emilio & Piro, Oreste Boundary Effects in The Complex Ginzburg-Landau Equation 1999 International Journal of Bifurcation and Chaos
Vol. 9, pp. 2209-2214 
article URL 
Abstract: The effect of a finite geometry in the two-dimensional complex Ginzburg-Landau equation is addressed. The presence of boundaries induces the formation of novel states. Target like-solutions appear as robust solutions under Dirichlet boundary conditions. Synchronization of plane waves emitted by boundaries, entrainement by corner emission, and
anchoring of defects by shock lines is also reported.

More info


Also available from LANL preprint server (arXiv.org) as
paper chao-dyn/9812010

The cover of the December 1999 issue of IJBC (Vol.9, #12), is a
spin-off of this article.
BibTeX:

@article{IMEDEA_intranet:306,

  author = {Eguiluz, Victor M. and Hernandez-Garcia, Emilio and Piro, Oreste},

  title = {Boundary Effects in The Complex Ginzburg-Landau Equation},

  journal = {International Journal of Bifurcation and Chaos},

  year = {1999},

  volume = {9},

  pages = {2209--2214},

  url = {http://www.imedea.uib.es/pub_download.php?id=306}

}

Gahl, A. & Balle, S. Influence of the Confinement Factor on the Wavelength-Dependent Output Properties of a Tapered Traveling Wave Semiconductor Amplifier 1999 IEEE Photonics Technology Letters
Vol. 11, pp. 1375-1377 
article URL 
Abstract:

We analyze the influence of the confinement factor on the
output properties of a tapered traveling wave semiconductor
amplifier as a function of the wavelength of the input
field and current injected into the amplifier. The
interaction of the optical field with the amplifying medium
is described by means of a susceptibility function taking
into account both the gain and the carrier-induced
anti-guiding effect, while the beam propagation method is
used to describe the evolution of the field along the
amplifier. We find that, for the same input power, devices
with lower optical confinement factors allow for the same
output optical power with better beam quality and higher
saturation power than devices with higher optical
confinement factor, in agreement with the available
experimental results.

ps file, 380 kB

BibTeX:

@article{IMEDEA_intranet:330,

  author = {A. Gahl and S. Balle},

  title = {Influence of the Confinement Factor on the Wavelength-Dependent Output Properties of a Tapered Traveling Wave Semiconductor Amplifier},

  journal = {IEEE Photonics Technology Letters},

  year = {1999},

  volume = {11},

  pages = {1375--1377},

  url = {http://www.imedea.uib.es/pub_download.php?id=330}

}

Balle, S.; Tolkachova, E.; Miguel, M. San; Tredicce, J. R.; Martín-Regalado, J. & Gahl, A. MECHANISMS OF POLARIZATION SWITCHING IN SINGLE-TRANSVERSE-MODE VCSELS: THERMAL SHIFT AND NONLINEAR SEMICONDUCTOR DYNAMICS 1999 Optics Letters
Vol. 24, pp. 1121-1124 
article URL 
Abstract:

We analyze polarization switching in Vertical Cavity Surface Emitting Lasers
taking into account a proper semiconductor frequency-dependent complex
susceptibility and spin-flip processes. Thermal effects are included as a
varying detuning, and gain differences arise from birefringence splitting. We
find that for large birefringence, gain differences between the two linearly
polarized modes are preponderant and switching occurs due to thermal shift. For
small birefringence, a polarization switching from the high-gain to the
low-gain mode occurs due to the combined effect of birefringence and
semiconductor phase-amplitude coupled dynamics for a finite value of the
carrier spin flip rate.
postscript (1.5Mb)

BibTeX:

@article{IMEDEA_intranet:331,

  author = {S. Balle and E. Tolkachova and M. San Miguel and J. R. Tredicce and J. Martín-Regalado and A. Gahl},

  title = {MECHANISMS OF POLARIZATION SWITCHING IN SINGLE-TRANSVERSE-MODE VCSELS: THERMAL SHIFT AND NONLINEAR SEMICONDUCTOR DYNAMICS},

  journal = {Optics Letters},

  year = {1999},

  volume = {24},

  pages = {1121--1124},

  url = {http://www.imedea.uib.es/pub_download.php?id=331}

}

Giudici, M.; Ackemann, T.; Barland, S.; Tredicce, J. R. & Balle, S. Polarization Dynamics in Vertical-Cavity Surface-Emitting Lasers with Optical Feedback: Experiment and Model 1999 Journal of the Optical Society of America B: Optical Physics
Vol. 16, pp. 2114-2123 
article URL 
Abstract:

We study the polarization resolved dynamics of a VCSEL with mode-matched and
unpolarized optical feedback. The total power can display Low-Frequency Fluctuations
which are associated with drops in power of the dominant linearly polarized mode and
bursts in the power of the depressed one. However, for most parameter values the
VCSEL output does not display Low-Frequency Fluctuations, although antiphase
dynamics among the two linear polarization components has been found. A theoretical
model that includes all reflections in the external cavity with a minimum
computational cost is developed.
postscript (6.5Mb)

BibTeX:

@article{IMEDEA_intranet:332,

  author = {M. Giudici and T. Ackemann and S. Barland and J. R. Tredicce and S. Balle},

  title = {Polarization Dynamics in Vertical-Cavity Surface-Emitting Lasers with Optical Feedback: Experiment and Model},

  journal = {Journal of the Optical Society of America B: Optical Physics},

  year = {1999},

  volume = {16},

  pages = {2114--2123},

  url = {http://www.imedea.uib.es/pub_download.php?id=332}

}

E., Cartwright J. H.; González, D. L. & Piro, O. Universality in Three-Frequency Resonances 1999 invalid journal
Vol. 59, pp. 2902-2906 
article URL 
Abstract: Available as postscript
or Gzip-compressed postscript.
BibTeX:

@article{IMEDEA_intranet:333,

  author = {Cartwright J. H. E. and González, D. L. and Piro, O.},

  title = {Universality in Three-Frequency Resonances},

  journal = {invalid journal},

  year = {1999},

  volume = {59},

  pages = {2902--2906},

  url = {http://www.imedea.uib.es/pub_download.php?id=333}

}

E., Cartwright J. H.; Eguíluz, Victor M.; Hernández-García, E. & Piro, O. Dynamics of Elastic Excitable Media 1999 invalid journal
Vol. 9, pp. 2197-2202 
article URL 
Abstract: The Burridge-Knopoff model of earthquake faults with viscous friction is equivalent to a van der Pol-FitzHugh-Nagumo model for excitable media with elastic coupling. The lubricated creep-slip friction law we use in the Burridge-Knopoff model describes the frictional sliding dynamics of a range of real materials. Low-dimensional structures including synchronized oscillations and propagating fronts are dominant, in agreement with the results of laboratory friction experiments. Here we explore the dynamics of fronts in elastic excitable media.

Available as postscript
or Gzip-compressed postscript.

Also available from LANL preprint server as paper chao-dyn/9905035
BibTeX:

@article{IMEDEA_intranet:338,

  author = {Cartwright J. H. E. and Eguíluz, Victor M. and Hernández-García, E. and Piro, O.},

  title = {Dynamics of Elastic Excitable Media},

  journal = {invalid journal},

  year = {1999},

  volume = {9},

  pages = {2197--2202},

  url = {http://www.imedea.uib.es/pub_download.php?id=338}

}

Calvo, O.; Cartwright, J. H. E.; González, D. L.; Piro, O. & Rosso, O. A. Three-Frequency Resonances in Dynamical Systems 1999 invalid journal
Vol. 9, pp. 2181-2188 
article URL 
Abstract: Available as postscript
or Gzip-compressed postscript.
BibTeX:

@article{IMEDEA_intranet:339,

  author = {Calvo, O. and Cartwright, J. H. E. and González, D. L. and Piro, O. and Rosso, O. A.},

  title = {Three-Frequency Resonances in Dynamical Systems},

  journal = {invalid journal},

  year = {1999},

  volume = {9},

  pages = {2181--2188},

  url = {http://www.imedea.uib.es/pub_download.php?id=339}

}

Eguiluz, Victor M.; Hernandez-Garcia, Emilio; Piro, Oreste & Balle, Salvador Frozen spatial chaos induced by boundaries 1999 Physical Review E - Statistical, Nonlinear, and Soft Matter Physics
Vol. 60, pp. 6571-6579 
article URL 
Abstract:

We show that rather simple but non-trivial boundary conditions could induce the appearance of spatial chaos (that is stationary, stable, but spatially disordered configurations) in extended dynamical systems with very simple dynamics. We exemplify the phenomenon with a nonlinear reaction-diffusion equation in a two-dimensional undulated domain. Concepts from the theory of dynamical systems, and a transverse-single-mode approximation are>used to describe the spatially chaotic structures.

Also available from LANL preprint server
(chao-dyn/9906014)

More info

BibTeX:

@article{IMEDEA_intranet:341,

  author = {Eguiluz, Victor M. and Hernandez-Garcia, Emilio and Piro, Oreste and Balle, Salvador},

  title = {Frozen spatial chaos induced by boundaries},

  journal = {Physical Review E - Statistical, Nonlinear, and Soft Matter Physics},

  year = {1999},

  volume = {60},

  pages = {6571--6579},

  url = {http://www.imedea.uib.es/pub_download.php?id=341}

}

E., Cartwright J. H.; González, D. L. & Piro, O. Nonlinear Dynamics of the Perceived Pitch of Complex Sounds 1999 Physical Review Letters
Vol. 82, pp. 5389-5392 
article URL 
Abstract: Nonlinear Dynamics of the Perceived Pitch of Complex Sounds
BibTeX:

@article{IMEDEA_intranet:343,

  author = {Cartwright J. H. E. and González, D. L. and Piro, O.},

  title = {Nonlinear Dynamics of the Perceived Pitch of Complex Sounds},

  journal = {Physical Review Letters},

  year = {1999},

  volume = {82},

  pages = {5389--5392},

  url = {http://www.imedea.uib.es/pub_download.php?id=343}

}

Balle, Salvador Simple Analytical Approximations for the Gain and Refractive Index Spectra in Quantum-Well Lasers 1998 Physical Review A - Atomic, Molecular, and Optical Physics
Vol. 57, pp. 1304-1312 
article URL 
Abstract:

An analytical expression for the low-temperature optical susceptibility of
Quantum-Well semiconductor lasers is presented based on a simple parabolic
band model. The optical susceptibility obtained keeps the nonlinear
dependence on the carrier density, providing both a broad gain spectrum and a
dispersion curve, so it can be used to analyze the dynamics of multimode
devices or devices with large carrier density variations. The resulting peak
gain, differential peak gain and linewidth enhancement factor are discussed.
CW operation of a single-mode laser is studied as a function of the frequency
of the cavity resonance.

(Postscript file, 28 pages)

BibTeX:

@article{IMEDEA_intranet:252,

  author = {Balle, Salvador},

  title = {Simple Analytical Approximations for the Gain and Refractive Index Spectra in Quantum-Well Lasers},

  journal = {Physical Review A - Atomic, Molecular, and Optical Physics},

  year = {1998},

  volume = {57},

  pages = {1304--1312},

  url = {http://www.imedea.uib.es/pub_download.php?id=252}

}

van der Lem, Han; Martin-Regalado, J.; Balle, S. & Mirasso, C. R. High Bit Rate Generation of Low Chirped Pulses from Vertical-Cavity Surface-Emitting Lasers via External Axial Magnetic Field 1998 IEEE Photonics Technology Letters
Vol. 10, pp. 21-23 
article URL 
Abstract:

The possibility of generating low chirped, fast optical pulses with
linear polarization in vertical-cavity surface-emitting lasers is
numerically explored. We show that, under the influence of an axial
magnetic field, polarization modulation at GHz rates can be achieved
with possible applications in optical clock generation/extraction and
optical communications.

[paper.ps]

BibTeX:

@article{IMEDEA_intranet:260,

  author = {van der Lem, Han and Martin-Regalado, J. and Balle, S. and Mirasso, C. R.},

  title = {High Bit Rate Generation of Low Chirped Pulses from Vertical-Cavity Surface-Emitting Lasers via External Axial Magnetic Field},

  journal = {IEEE Photonics Technology Letters},

  year = {1998},

  volume = {10},

  pages = {21--23},

  url = {http://www.imedea.uib.es/pub_download.php?id=260}

}

Gahl, A.; Balle, S. & San Miguel, M. Polarization Properties of Optically Pumped VCSELs in a Transverse Magnetic Field 1998 Quantum and Semiclassical Optics
Vol. 10, pp. L1-L5 
article URL 
Abstract:

It is shown that the polarization ellipticity of light
emitted by a VCSEL, which is optically pumped with
circularly polarized light, depends significantly on the
strength of a transverse magnetic field. This dependence
can be used for a precise determination of the electron
spin relaxation rate under lasing conditions at room
temperature.
300kB

BibTeX:

@article{IMEDEA_intranet:274,

  author = {Gahl, A. and Balle, S. and San Miguel, M. },

  title = {Polarization Properties of Optically Pumped VCSELs in a Transverse Magnetic Field},

  journal = {Quantum and Semiclassical Optics},

  year = {1998},

  volume = {10},

  pages = {L1--L5},

  url = {http://www.imedea.uib.es/pub_download.php?id=274}

}

Huyet, Guillaume; Balle, Salvador; Giudici, Massimo; Green, Charles K.; Giacomelli, Gianni & Tredicce, Jorge R. Low Frequency Fluctuations and Multimode Operation of a Semiconductor Laser with Optical Feedback 1998 Optics Communications
Vol. 149, pp. 341-347 
article URL 
Abstract:

We experimentally investigate low frequency fluctuations (LFF) in a Fabry-Perot semiconductor laser with optical
feedback from an external mirror. During LFF, the time resolved optical spectrum shows that many longitudinal
modes of the solitary laser enter into the transients. After each LFF event, the excited solitary-laser modes
recover similarly. However, the recovery for the power in each mode is much slower than the recovery of the
total power. The intermode exchange of energy during the recovery indicates that a single-longitudinal mode
description of such LFF behavior will not capture important underlying dynamics. The relevance of multimode
dynamics is confirmed in a feedback experiment where the external mirror is substituted by a diffraction
grating.

(Postscript file, 7 pages, 791 kb)

BibTeX:

@article{IMEDEA_intranet:278,

  author = {Huyet, Guillaume and Balle, Salvador and Giudici, Massimo and Green, Charles K. and Giacomelli, Gianni and Tredicce, Jorge R.},

  title = {Low Frequency Fluctuations and Multimode Operation of a Semiconductor Laser with Optical Feedback},

  journal = {Optics Communications},

  year = {1998},

  volume = {149},

  pages = {341--347},

  url = {http://www.imedea.uib.es/pub_download.php?id=278}

}

Valle, A.; Martin-Regalado, J.; Pesquera, L.; Balle, S. & San Miguel, M. Polarization dynamics of birefringent index-guided Vertical-Cavity Surface-Emitting Lasers 1998 Proceedings of the SPIE
Vol. 3283, pp. 280-291 
inproceedings URL 
Abstract:

We study the polarization behavior of birefringent multi--transverse
mode index--guided Vertical--Cavity Surface--Emitting Lasers (VCSELs)
during CW and modulation operation. The model we use incorporates the
linewidth enhancement factor, different carriers populations associated with
different magnetic sublevels of the conduction and heavy hole valence
bands in quantum well media, spin-flip relaxation processes and cavity
anisotropies. The effect of carrier diffusion and spatial hole
burning on the polarization behavior within the fundamental mode
regime is also considered. We find that spin-flip dynamics and the
linewidth enhancement factor are crucial for the selection of the polarization
state corresponding to a given injection current. We also analyze the
direct-current polarization modulation response for both the small and
large signal modulation regimes. In both cases the current is
modulated around the polarization switching (PS) current, but in the
large signal modulation regime the current goes from below threshold
to above the PS current. A frequency doubled polarized output is
obtained under large signal modulation for modulation frequencies
smaller than 10 MHz. At greater frequencies (around 100 MHz)
transient mode polarization partition noise becomes important. At the
greatest considered frequency (1 GHz) no PS is observed. Finally the
effect of multiple transverse mode operation is addressed by
considering the two lowest order modes: LP01 and LP11.

paper.ps

BibTeX:

@inproceedings{IMEDEA_intranet:283,

  author = {Valle, A. and Martin-Regalado, J. and Pesquera, L. and Balle, S. and San Miguel, M.},

  title = {Polarization dynamics of birefringent index-guided Vertical-Cavity Surface-Emitting Lasers},

  journal = {Proceedings of the SPIE},

  year = {1998},

  volume = {3283},

  pages = {280--291},

  url = {http://www.imedea.uib.es/pub_download.php?id=283}

}

Eguíluz, Víctor M.; Hernández-García, Emilio; Piro, Oreste & Balle, Salvador Boundary induced frozen chaos 1998 Anales de Física
Vol. 4, pp. 215-216 
article URL 
Abstract:

FISES97, Proceedings of the VIII Spanish
Meeting on Statistical Physics, Edited by J.A. Cuesta and A. Sánchez.
Anales de Física, Monografías RSEF, vol. 4, Editorial CIEMAT, Madrid,
215-216 (1998).

BibTeX:

@article{IMEDEA_intranet:300,

  author = {Eguíluz, Víctor M. and Hernández-García, Emilio and Piro, Oreste and Balle, Salvador},

  title = {Boundary induced frozen chaos},

  journal = {Anales de Física},

  year = {1998},

  volume = {4},

  pages = {215--216},

  url = {http://www.imedea.uib.es/pub_download.php?id=300}

}

Vashenko, G.; Giudici, M.; Rocca, J. J.; Menoni, C. S.; Tredicce, J. R. & Balle, S. Temporal Dynamics of Semiconductor Lasers with Optical Feedback 1998 Physical Review Letters
Vol. 81, pp. 5536-5539 
article URL 
Abstract:

We measure the temporal evolution of the intensity of an edge emitting
semiconductor laser with delayed optical feedback for time spans ranging from
4.5 to 65 ns with a time resolution from 16ps to 230ps respectively. Spectrally
resolved streak camera measurements show that the fast pulsing of the total
intensity is a consequence of the time delay and multimode operation of the
laser. We experimentally observe that the instabilities at low
frequency are generated by the interaction among different modes of the
laser.

(Postscript file, 13 pages, 900 kb)

BibTeX:

@article{IMEDEA_intranet:312,

  author = {Vashenko, G. and Giudici, M. and Rocca, J. J. and Menoni, C. S. and Tredicce, J. R. and Balle, S.},

  title = {Temporal Dynamics of Semiconductor Lasers with Optical Feedback},

  journal = {Physical Review Letters},

  year = {1998},

  volume = {81},

  pages = {5536--5539},

  url = {http://www.imedea.uib.es/pub_download.php?id=312}

}

E., Cartwright J. H.; González, D. L. & Piro, O. On a New Nonlinear Model for Pitch Perception 1998 invalid journal, pp. 193-194  article URL 
BibTeX:

@article{IMEDEA_intranet:334,

  author = {Cartwright J. H. E. and González, D. L. and Piro, O.},

  title = {On a New Nonlinear Model for Pitch Perception},

  journal = {invalid journal},

  year = {1998},

  pages = {193--194},

  url = {http://www.imedea.uib.es/pub_download.php?id=334}

}

Calvo, O.; E., Cartwright J. H.; González, D. L.; Piro, O. & Sportolari, F. Three-Frequency Dynamics of Coupled Phase-Locked Loops 1998 invalid journal, pp. 91-94  article URL 
BibTeX:

@article{IMEDEA_intranet:335,

  author = {Calvo, O. and Cartwright J. H. E. and González, D. L. and Piro, O. and Sportolari, F.},

  title = {Three-Frequency Dynamics of Coupled Phase-Locked Loops},

  journal = {invalid journal},

  year = {1998},

  pages = {91--94},

  url = {http://www.imedea.uib.es/pub_download.php?id=335}

}

E., Cartwright J. H.; González, D. L. & Piro, O. On Pitch Perception of Complex Sounds: Nonlinearity Revisited 1998 invalid journal, pp. 141-146  article URL 
BibTeX:

@article{IMEDEA_intranet:337,

  author = {Cartwright J. H. E. and González, D. L. and Piro, O.},

  title = {On Pitch Perception of Complex Sounds: Nonlinearity Revisited},

  journal = {invalid journal},

  year = {1998},

  pages = {141--146},

  url = {http://www.imedea.uib.es/pub_download.php?id=337}

}

Cartwright, J. H. E.; Hernández-García, E. & Piro, O. Burridge-Knopoff Models as Elastic Excitable Media 1997 Physical Review Letters
Vol. 79, pp. 527-530 
article URL 
Abstract: Burridge-Knopoff models as elastic excitable media

We construct a model of an excitable medium with elastic rather than the usual
diffusive coupling. We explore the dynamics of elastic excitable media, which
we find to be dominated by low dimensional structures, including global
oscillations, period-doubled pacemakers, and propagating fronts. We suggest
that examples of elastic excitable media are to be found in such diverse physical
systems as Burridge-Knopoff models of frictional sliding, electronic
transmission lines, and active optical waveguides.

Also available from Los Alamos CNLS server:
chao-dyn/9708008
BibTeX:

@article{IMEDEA_intranet:255,

  author = {Cartwright, J. H. E. and Hernández-García, E. and Piro, O.},

  title = {Burridge-Knopoff Models as Elastic Excitable Media},

  journal = {Physical Review Letters},

  year = {1997},

  volume = {79},

  pages = {527--530},

  url = {http://www.imedea.uib.es/pub_download.php?id=255}

}

Martín-Regalado, J.; Balle, S. & San Miguel, M. Polarization and transverse mode dynamics of gain-guided Vertical-Cavity Surface Emitting Lasers 1997 Optics Letters
Vol. 22, pp. 460-462 
article URL 
Abstract:

Transverse mode competition and polarization selection in gain-guided Vertical
Cavity Surface Emitting Lasers are studied using a transverse continuous model
which incorporates basic physical mechanisms of polarization dynamics.
Polarization stability and polarization switching within the fundamental
Gaussian mode are described. The first order transverse mode always starts
lasing orthogonally polarized to the fundamental one. At larger currents
polarization coexistence with several active transverse modes occur. These
results are shown to be sensitive to the carrier spin-flip relaxation rate.

transverse.ps

BibTeX:

@article{IMEDEA_intranet:257,

  author = {Martín-Regalado, J. and Balle, S. and San Miguel, M.},

  title = {Polarization and transverse mode dynamics of gain-guided Vertical-Cavity Surface Emitting Lasers},

  journal = {Optics Letters},

  year = {1997},

  volume = {22},

  pages = {460--462},

  url = {http://www.imedea.uib.es/pub_download.php?id=257}

}

Martin-Regalado, J.; Balle, S.; San Miguel, M.; Valle, A. & Pesquera, L. Polarization and transverse mode selection in quantum-well Vertical-Cavity Surface-Emitting Lasers: index- and gain-guided devices 1997 Journal of Optics B-Quantum and Semiclassical Optics
Vol. 9, pp. 713-736 
article URL 
Abstract:

We study polarization switching and transverse mode competition in
Vertical Cavity Surface Emitting Lasers in the absence of temperature
effects. We use a model that incorporates the vector nature of the
laser field, saturable dispersion, different carrier populations
associated with different magnetic sublevels of the conduction and
heavy hole valence bands in quantum well media, spin-flip relaxation
processes and cavity birefringence and dichroism. We consider both
index-guided and gain-guided VCSELs, and we find that spin-flip
dynamics and linewidth enhancement factor are crucial for the
selection of the polarization state corresponding to a given injection
current. For index-guided VCSELs the effect of spatial hole burning
on the polarization behavior within the fundamental mode regime is
discussed. For gain-guided VCSELs, transverse mode and polarization
selection is studied within a Maxwell-Bloch approximation which
includes field diffraction and carrier diffusion. Polarization
switching is found in the fundamental mode regime. The first order
transverse mode starts lasing orthogonally polarized to the
fundamental mode. At larger currents polarization coexistence with
several active transverse modes occurs.

text.ps
figures.ps

 

BibTeX:

@article{IMEDEA_intranet:261,

  author = {Martin-Regalado, J. and Balle, S. and San Miguel, M. and Valle, A. and Pesquera, L.},

  title = {Polarization and transverse mode selection in quantum-well Vertical-Cavity Surface-Emitting Lasers: index- and gain-guided devices},

  journal = {Journal of Optics B-Quantum and Semiclassical Optics},

  year = {1997},

  volume = {9},

  pages = {713--736},

  url = {http://www.imedea.uib.es/pub_download.php?id=261}

}

Martin-Regalado, J.; Balle, S. & Abraham, N. B. Spatio-temporal dynamics of gain-guided semiconductor laser arrays 1996 IEEE Journal of Quantum Electronics
Vol. 32(2), pp. 257-266 
article DOI URL 
Abstract:

A continuous model based on the coupled field-matter Maxwell-Bloch
equations for a two-level homogeneously broadened single mode laser
is developed. The model includes a Langevin formulation to model
thermal and spontaneous emission noises and accounts for carrier
diffusion, optical field diffraction and current spreading. Our
model is flexible enough to simulate any gain-guided longitudinally
uniform laser geometry and is applied to both a single-stripe and a
four-stripe gain-guided semiconductor lasers where the influence
of the injection current, the interstripe distance and carrier
diffusion is discussed within the context of the laser dynamics. We
show that an array operating with quasi-independent stripes may be
achieved at low pumps and larger interstripe distances. However as
injection current is increased or the interstripe distance is
decreased, the device passes through a variety of dynamical
instabilities which can be analyzed in the context of lateral cavity
modes. Moreover, we also show that the array dynamics is strongly
influenced by carrier diffusion which may also lead to different
thresholds for each element of the array.

[array.ps.gz]

BibTeX:

@article{IMEDEA_intranet:163,

  author = {Martin-Regalado, J. and Balle, S. and Abraham, N. B.},

  title = {Spatio-temporal dynamics of gain-guided semiconductor laser arrays},

  journal = {IEEE Journal of Quantum Electronics},

  year = {1996},

  volume = {32},

  number = {2},

  pages = {257--266},

  url = {http://www.imedea.uib.es/pub_download.php?id=163},

  doi = {http://dx.doi.org/10.1109/3.481873}

}

Martin-Regalado, J.; Balle, S. & Abraham, N. B. Spatio-temporal dynamics of gain-guided semiconductor laser arrays and broad area lasers 1996 Proceedings of the SPIE
Vol. 2693(2693), pp. 369 
inproceedings URL 
Abstract:

Spatio-Temporal dynamics of a gain-guided semiconductor lasers is modeled based
on the Maxwell-Bloch equations for a two-level homogeneously broadened single
mode laser. The influence of some carrier-sensitive mechanism, as carrier
diffusion or injection current, on the dynamics of these gain-guided devices is
studied.

[gain-g.ps.gz]

BibTeX:

@inproceedings{IMEDEA_intranet:164,

  author = {Martin-Regalado, J. and Balle, S. and Abraham, N. B.},

  title = {Spatio-temporal dynamics of gain-guided semiconductor laser arrays and broad area lasers},

  journal = {Proceedings of the SPIE},

  year = {1996},

  volume = {2693},

  number = {2693},

  pages = {369},

  url = {http://www.imedea.uib.es/pub_download.php?id=164}

}

Martin-Regalado, J.; van Tartwijk, G. H. M.; Balle, S. & San Miguel, M. Effects of external optical feedback in broad-area lasers 1996 Procedings
Vol. 6, pp. 205-208 
inproceedings URL 
Abstract:

External optical feedback is applied to broad-area lasers to permit
lateral mode selection and pattern stabilization of the output beam
which usually suffers from undesirable filamentation.

[IPR_96.ps]

BibTeX:

@inproceedings{IMEDEA_intranet:166,

  author = {Martin-Regalado, J. and van Tartwijk, G. H. M. and Balle, S. and San Miguel, M.},

  title = {Effects of external optical feedback in broad-area lasers},

  journal = {Procedings},

  year = {1996},

  volume = {6},

  pages = {205--208},

  url = {http://www.imedea.uib.es/pub_download.php?id=166}

}

Martin-Regalado, J.; van Tartwijk, G. H. M.; Balle, S. & San Miguel, M. Mode control and pattern stabilization in broad-area lasers by optical feedback 1996 Physical Review A - Atomic, Molecular, and Optical Physics
Vol. 54(6), pp. 5386-5393 
article DOI URL 
Abstract:

Broad-area lasers exhibit complex spatio-temporal behavior due to multilateral
mode operation, emitting filamented beams with low spatial coherence. Using
weak external optical feedback we demonstrate that some degree of lateral mode
selection and pattern stabilization of these lasers can be obtained under
appropriate feedback conditions.

[br_fed.ps]

BibTeX:

@article{IMEDEA_intranet:167,

  author = {Martin-Regalado, J. and van Tartwijk, G. H. M. and Balle, S. and San Miguel, M.},

  title = {Mode control and pattern stabilization in broad-area lasers by optical feedback},

  journal = {Physical Review A - Atomic, Molecular, and Optical Physics},

  year = {1996},

  volume = {54},

  number = {6},

  pages = {5386--5393},

  url = {http://www.imedea.uib.es/pub_download.php?id=167},

  doi = {http://dx.doi.org/10.1103/PhysRevA.54.5386}

}

Homar, M.; Balle, S. & San Miguel, M. Mode Competition in a Fabry Perot Semiconductor Laser:Travelling Wave Model with Asymmetric Dynamical Gain 1996 Optics Communications
Vol. 131, pp. 380-390 
article URL 
Abstract:

Mode Competition in a Fabry Perot Semiconductor Laser:Travelling Wave Model with Asymmetric Dynamical Gain

BibTeX:

@article{IMEDEA_intranet:49,

  author = {Homar, M. and Balle, S. and San Miguel, M.},

  title = {Mode Competition in a Fabry Perot Semiconductor Laser:Travelling Wave Model with Asymmetric Dynamical Gain},

  journal = {Optics Communications},

  year = {1996},

  volume = {131},

  pages = {380--390},

  url = {http://www.imedea.uib.es/pub_download.php?id=49}

}

Cartwright, J. H. E.; Feingold, M. & Piro, O. Chaotic Advection in Three-Dimensional Unsteady Incompressible Laminar Flow 1996 invalid journal
Vol. 316, pp. 259-284 
article URL 
Abstract: As postscript (5.5 Mb)
or Gzip-compressed postscript (1.4 Mb).
BibTeX:

@article{IMEDEA_intranet:80,

  author = {Cartwright, J. H. E. and Feingold, M. and Piro, O.},

  title = {Chaotic Advection in Three-Dimensional Unsteady Incompressible Laminar Flow},

  journal = {invalid journal},

  year = {1996},

  volume = {316},

  pages = {259--284},

  url = {http://www.imedea.uib.es/pub_download.php?id=80}

}

Balle, S.; Homar, M. & San Miguel, M. Statistical Properties of the Spectrum of Light Pulses in Fast Pseudorandom Word Modulation of a Single Mode Semiconductor laser 1995 IEEE Journal of Quantum Electronics
Vol. 31, pp. 1401-1408 
article DOI URL 
Abstract:

Statistical Properties of the Spectrum of Light Pulses in Fast Pseudorandom Word Modulation of a Single Mode Semiconductor laser

BibTeX:

@article{IMEDEA_intranet:19,

  author = {Balle, S. and Homar, M. and San Miguel, M.},

  title = {Statistical Properties of the Spectrum of Light Pulses in Fast Pseudorandom Word Modulation of a Single Mode Semiconductor laser},

  journal = {IEEE Journal of Quantum Electronics},

  year = {1995},

  volume = {31},

  pages = {1401--1408},

  url = {http://www.imedea.uib.es/pub_download.php?id=19},

  doi = {http://dx.doi.org/10.1109/3.400390}

}

E., Cartwright J. H.; González, D. L.; Morettini, L.; Piro, O.; Rosso, O. & Sportolari, F. Pitch Perception of Complex Sounds: Nonlinearity Revisited. 1995 invalid journal, pp. 319-328  article URL 
BibTeX:

@article{IMEDEA_intranet:32,

  author = {Cartwright J. H. E. and González, D. L. and Morettini, L. and Piro, O. and Rosso, O. and Sportolari, F.},

  title = {Pitch Perception of Complex Sounds: Nonlinearity Revisited.},

  journal = {invalid journal},

  year = {1995},

  pages = {319--328},

  url = {http://www.imedea.uib.es/pub_download.php?id=32}

}

Feingold, M. & Piro, O. Localized States in the Chaotic Ce Atom 1995 invalid journal
Vol. 51, pp. 4279 
article URL 
Abstract: Localized States in the Chaotic Ce Atom
BibTeX:

@article{IMEDEA_intranet:52,

  author = {Feingold, M. and Piro, O.},

  title = {Localized States in the Chaotic Ce Atom},

  journal = {invalid journal},

  year = {1995},

  volume = {51},

  pages = {4279},

  url = {http://www.imedea.uib.es/pub_download.php?id=52}

}

Cartwright, J. H. E.; Feingold, M. & Piro, O. Global Diffusion in a Realistic Three-Dimensional Time-Dependent Nonturbulent Fluid Flow 1995 Physical Review Letters
Vol. 75, pp. 3669-3672 
article URL 
Abstract: Global diffusion in a realistic three-dimensional time-dependent nonturbulent fluid flow

As postscript (1.4 Mb)
or Gzip-compressed postscript (0.4 Mb).
BibTeX:

@article{IMEDEA_intranet:58,

  author = {Cartwright, J. H. E. and Feingold, M. and Piro, O.},

  title = {Global Diffusion in a Realistic Three-Dimensional Time-Dependent Nonturbulent Fluid Flow},

  journal = {Physical Review Letters},

  year = {1995},

  volume = {75},

  pages = {3669--3672},

  url = {http://www.imedea.uib.es/pub_download.php?id=58}

}

Balle, S. Effective Two-Level-Model with Asymmetric Gain for Laser Diodes 1995 Optics Communications
Vol. 119, pp. 227-235 
article URL 
Abstract:

Effective Two-Level-Model with Asymmetric Gain for Laser Diodes

BibTeX:

@article{IMEDEA_intranet:66,

  author = {Balle, S.},

  title = {Effective Two-Level-Model with Asymmetric Gain for Laser Diodes},

  journal = {Optics Communications},

  year = {1995},

  volume = {119},

  pages = {227--235},

  url = {http://www.imedea.uib.es/pub_download.php?id=66}

}

Cartwright, J. H. E. & Piro, O. Chaos in Biology 1995 invalid journal, pp. 18-28  article URL 
BibTeX:

@article{IMEDEA_intranet:81,

  author = {Cartwright, J. H. E. and Piro, O.},

  title = {Chaos in Biology},

  journal = {invalid journal},

  year = {1995},

  pages = {18--28},

  url = {http://www.imedea.uib.es/pub_download.php?id=81}

}

Cartwright, J. H. E.; Feingold, M. & Piro, O. Passive Scalars and Three-Dimensional Liouvillian Maps 1994 Physica D
Vol. 76, pp. 22-33 
article URL 
Abstract: As postscript (3.3Mb)
or Gzip-compressed postscript (0.35 Mb).
BibTeX:

@article{IMEDEA_intranet:111,

  author = {Cartwright, J. H. E. and Feingold, M. and Piro, O.},

  title = {Passive Scalars and Three-Dimensional Liouvillian Maps},

  journal = {Physica D},

  year = {1994},

  volume = {76},

  pages = {22--33},

  url = {http://www.imedea.uib.es/pub_download.php?id=111}

}

Rutman, O.; Feingold, M.; Avishai, Y. & Piro, O. Localization in Quasi-1D systems: Perturbation Theory and Scaling 1994 invalid journal
Vol. 28, pp. 329 
article URL 
Abstract: Localization in Quasi-1D systems: Perturbation Theory and Scaling
BibTeX:

@article{IMEDEA_intranet:112,

  author = {Rutman, O. and Feingold, M. and Avishai, Y. and Piro, O.},

  title = {Localization in Quasi-1D systems: Perturbation Theory and Scaling},

  journal = {invalid journal},

  year = {1994},

  volume = {28},

  pages = {329},

  url = {http://www.imedea.uib.es/pub_download.php?id=112}

}

Chen, Z.; Abraham, N. B.; Balle, S.; DAngelo, E. & Tredicce, J. Space-Time Dynamics in the Transverse Patterns of a Laser from a Model Not Restricted a priori to a Few Modes 1994 Proceedings of the SPIE
Vol. 4(2099), pp. 2-9 
inproceedings URL 
Abstract:

Space-Time Dynamics in the Transverse Patterns of a Laser from a Model Not Restricted a priori to a Few Modes

BibTeX:

@inproceedings{IMEDEA_intranet:114,

  author = {Chen, Z. and Abraham, N. B. and Balle, S. and DAngelo, E. and Tredicce, J.},

  title = {Space-Time Dynamics in the Transverse Patterns of a Laser from a Model Not Restricted a priori to a Few Modes},

  journal = {Proceedings of the SPIE},

  year = {1994},

  volume = {4},

  number = {2099},

  pages = {2--9},

  url = {http://www.imedea.uib.es/pub_download.php?id=114}

}

Piro, O. The Object Oriented Programing Paradigm in Physics 1994 invalid journal  article URL 
BibTeX:

@article{IMEDEA_intranet:115,

  author = {Piro, O.},

  title = {The Object Oriented Programing Paradigm in Physics},

  journal = {invalid journal},

  year = {1994},

  url = {http://www.imedea.uib.es/pub_download.php?id=115}

}

Colet, P. & Balle, S. Spatial Hole Burning Effects in the Emission Characteristics of DFB Laser Diodes 1994 Procedings
Vol. 3, pp. 108-110 
inproceedings URL 
Abstract:

Spatial Hole Burning Effects in the Emission Characteristics of DFB Laser Diodes

BibTeX:

@inproceedings{IMEDEA_intranet:23,

  author = {Colet, P. and Balle, S.},

  title = {Spatial Hole Burning Effects in the Emission Characteristics of DFB Laser Diodes},

  journal = {Procedings},

  year = {1994},

  volume = {3},

  pages = {108--110},

  url = {http://www.imedea.uib.es/pub_download.php?id=23}

}

Fernández-Casares, S.; Balle, S.; Menéndez-Valdés, P. & San Miguel, M. Variable Waveguide Model for Gain-Guided Laser Arrays 1994
Vol. 3Integrated Photonics Research 1994, pp. 354-356 
inbook URL 
Abstract:

Variable Waveguide Model for Gain-Guided Laser Arrays

BibTeX:

@inbook{IMEDEA_intranet:4,

  author = {Fernández-Casares, S. and Balle, S. and Menéndez-Valdés, P. and San Miguel, M.},

  title = {Variable Waveguide Model for Gain-Guided Laser Arrays},

  booktitle = {Integrated Photonics Research 1994},

  publisher = {OSA Technical Digest Series, vol. 3},

  year = {1994},

  volume = {3},

  pages = {354--356},

  url = {http://www.imedea.uib.es/pub_download.php?id=4}

}

Fernández-Casares, S.; Balle, S. & Menéndez-Valdés, P. Mode Beating and Spontaneous Emission Noise Effects in a Variable Waveguide Model for the Dynamics of Gain-Guided Semiconductor Laser Arrays 1994 IEEE Journal of Quantum Electronics
Vol. 30, pp. 2449-2457 
article DOI URL 
Abstract:

Mode Beating and Spontaneous Emission Noise Effects in a Variable Waveguide Model for the Dynamics of Gain-Guided Semiconductor Laser Arrays

BibTeX:

@article{IMEDEA_intranet:50,

  author = {Fernández-Casares, S. and Balle, S. and Menéndez-Valdés, P.},

  title = {Mode Beating and Spontaneous Emission Noise Effects in a Variable Waveguide Model for the Dynamics of Gain-Guided Semiconductor Laser Arrays},

  journal = {IEEE Journal of Quantum Electronics},

  year = {1994},

  volume = {30},

  pages = {2449--2457},

  url = {http://www.imedea.uib.es/pub_download.php?id=50},

  doi = {http://dx.doi.org/10.1109/3.333695}

}

Balle, S.; San Miguel, M.; Abraham, N. B.; Tredicce, J. R.; Alvarez, R.; DAngelo, E.; Gambhir, A.; Thornburg, K. & Roy, R. Transients in Multivariable Dynamical Systems Depend onwhich Parameter is Switched as Illustrated in Lasers 1994 Physical Review Letters
Vol. 72, pp. 3510-3513 
article URL 
Abstract:

Transients in Multivariable Dynamical Systems Depend onwhich Parameter is Switched as Illustrated in Lasers

BibTeX:

@article{IMEDEA_intranet:7,

  author = {Balle, S. and San Miguel, M. and Abraham, N. B. and Tredicce, J. R. and Alvarez, R. and DAngelo, E. and Gambhir, A. and Thornburg, K. and Roy, R.},

  title = {Transients in Multivariable Dynamical Systems Depend onwhich Parameter is Switched as Illustrated in Lasers},

  journal = {Physical Review Letters},

  year = {1994},

  volume = {72},

  pages = {3510--3513},

  url = {http://www.imedea.uib.es/pub_download.php?id=7}

}

Cecchi, G. A.; González, D. L.; Magnasco, M. O.; Mindlin, G. B.; Piro, O. & Santillán, A. J. Periodically Kicked Hard Oscillators 1993 Chaos
Vol. 3, pp. 51 
article URL 
Abstract: Periodically Kicked Hard Oscillators
BibTeX:

@article{IMEDEA_intranet:121,

  author = {Cecchi, G. A. and González, D. L. and Magnasco, M. O. and Mindlin, G. B. and Piro, O. and Santillán, A. J.},

  title = {Periodically Kicked Hard Oscillators},

  journal = {Chaos},

  year = {1993},

  volume = {3},

  pages = {51},

  url = {http://www.imedea.uib.es/pub_download.php?id=121}

}

Homar, M.; San Miguel, M. & Balle, S. Semiconductor Lasers with Weak Optical Feedback: Spectral Properties and Frequency Dependent Lasers 1993 Optics Letters
Vol. 18, pp. 1329-1331 
article URL 
Abstract:

We report a calculation of the field spectrum of a single-mode semiconductor laser with weak optical feedback and
compare it with numerical simulations. We show that the change in the spectral properties induced by weak
feedback can be obtained by a simpler model that introduces frequency-dependent losses. The increase in the
asymmetry of the side peaks of the spectrum with increasing feedback delay time is characterized.

BibTeX:

@article{IMEDEA_intranet:155,

  author = {Homar, M. and San Miguel, M. and Balle, S.},

  title = {Semiconductor Lasers with Weak Optical Feedback: Spectral Properties and Frequency Dependent Lasers},

  journal = {Optics Letters},

  year = {1993},

  volume = {18},

  pages = {1329--1331},

  url = {http://www.imedea.uib.es/pub_download.php?id=155}

}

Balle, S.; Abraham, N. B.; Colet, P. & San Miguel, M. Parametric Dependence of Stochastic Frequency Variations in the Gain-Swtiching of a Single-Mode Laser Diode 1993 IEEE Journal of Quantum Electronics
Vol. 29, pp. 33-41 
article DOI URL 
Abstract:

Parametric Dependence of Stochastic Frequency Variations in the Gain-Swtiching of a Single-Mode Laser Diode

BibTeX:

@article{IMEDEA_intranet:40,

  author = {Balle, S. and Abraham, N. B. and Colet, P. and San Miguel, M.},

  title = {Parametric Dependence of Stochastic Frequency Variations in the Gain-Swtiching of a Single-Mode Laser Diode},

  journal = {IEEE Journal of Quantum Electronics},

  year = {1993},

  volume = {29},

  pages = {33--41},

  url = {http://www.imedea.uib.es/pub_download.php?id=40},

  doi = {http://dx.doi.org/10.1109/3.199242}

}

Torrent, M. C. & Balle, S. Encendido del láser y detección de señales inyectadas en láseres semiconductores 1993 Optica Pura y Aplicada
Vol. 26, pp. 878 
article URL 
Abstract:

Encendido del láser y detección de señales inyectadas en láseres semiconductores

BibTeX:

@article{IMEDEA_intranet:63,

  author = {Torrent, M. C. and Balle, S.},

  title = {Encendido del láser y detección de señales inyectadas en láseres semiconductores},

  journal = {Optica Pura y Aplicada},

  year = {1993},

  volume = {26},

  pages = {878},

  url = {http://www.imedea.uib.es/pub_download.php?id=63}

}

Balle, S.; Banerjee, R. & San Miguel, M. Effects of an Intensity Dependent Linewidth Enhancement Factor on the Transient Spectral Properties of a Gain-Switched Single-Mode Semiconductor Laser 1993 IEEE Photonics Technology Letters
Vol. 5, pp. 503-506 
article DOI URL 
Abstract:

Effects of an Intensity Dependent Linewidth Enhancement Factor on the Transient Spectral Properties of a Gain-Switched Single-Mode Semiconductor Laser

BibTeX:

@article{IMEDEA_intranet:65,

  author = {Balle, S. and Banerjee, R. and San Miguel, M.},

  title = {Effects of an Intensity Dependent Linewidth Enhancement Factor on the Transient Spectral Properties of a Gain-Switched Single-Mode Semiconductor Laser},

  journal = {IEEE Photonics Technology Letters},

  year = {1993},

  volume = {5},

  pages = {503--506},

  url = {http://www.imedea.uib.es/pub_download.php?id=65},

  doi = {http://dx.doi.org/10.1109/68.215262}

}

Torrent, M. C.; Balle, S.; San Miguel, M. & Sancho, J. M. Detection of a Weak External Signal via the Switch-On Time Statistics of a Semiconductor Laser 1993 Physical Review A - Atomic, Molecular, and Optical Physics
Vol. 47(4), pp. 3390-3395 
article URL 
Abstract:

Detection of a Weak External Signal via the Switch-On Time Statistics of a Semiconductor Laser

BibTeX:

@article{IMEDEA_intranet:69,

  author = {Torrent, M. C. and Balle, S. and San Miguel, M. and Sancho, J. M.},

  title = {Detection of a Weak External Signal via the Switch-On Time Statistics of a Semiconductor Laser},

  journal = {Physical Review A - Atomic, Molecular, and Optical Physics},

  year = {1993},

  volume = {47},

  number = {4},

  pages = {3390--3395},

  url = {http://www.imedea.uib.es/pub_download.php?id=69}

}

Bromley, D.; DAngelo, E. J.; Grassi, H.; Mathis, C.; Tredicce, J. R. & Balle, S. Anticipation of the Switch-Off and Delay of the Switch-On of a Laser with a Sweeping Parameter 1993 Optics Communications
Vol. 99, pp. 65-70 
article URL 
Abstract:

Anticipation of the Switch-Off and Delay of the Switch-On of a Laser with a Sweeping Parameter

BibTeX:

@article{IMEDEA_intranet:82,

  author = {Bromley, D. and DAngelo, E. J. and Grassi, H. and Mathis, C. and Tredicce, J. R. and Balle, S.},

  title = {Anticipation of the Switch-Off and Delay of the Switch-On of a Laser with a Sweeping Parameter},

  journal = {Optics Communications},

  year = {1993},

  volume = {99},

  pages = {65--70},

  url = {http://www.imedea.uib.es/pub_download.php?id=82}

}

Balle, S.; Mirasso, C. R.; Sapia, A. & Spano, P. Analytical Results of the Switch-on Time Statistics in DFB Laser Diodes Driven by ShortTriangular Pulses 1993 Applied Physics Letters
Vol. 63, pp. 1721 
article URL 
Abstract:

Analytical Results of the Switch-on Time Statistics in DFB Laser Diodes Driven by ShortTriangular Pulses

BibTeX:

@article{IMEDEA_intranet:83,

  author = {Balle, S. and Mirasso, C. R. and Sapia, A. and Spano, P.},

  title = {Analytical Results of the Switch-on Time Statistics in DFB Laser Diodes Driven by ShortTriangular Pulses},

  journal = {Applied Physics Letters},

  year = {1993},

  volume = {63},

  pages = {1721},

  url = {http://www.imedea.uib.es/pub_download.php?id=83}

}

Buric, N.; Percival, I. C. & Piro, O. Exact Results on the Critical Function for the Motion of an Electron Driven by Two Plane Waves 1992 invalid journal
Vol. 165, pp. 320 
article URL 
Abstract: Exact Results on the Critical Function for the Motion of an Electron Driven by Two Plane Waves
BibTeX:

@article{IMEDEA_intranet:141,

  author = {Buric, N. and Percival, I. C. and Piro, O.},

  title = {Exact Results on the Critical Function for the Motion of an Electron Driven by Two Plane Waves},

  journal = {invalid journal},

  year = {1992},

  volume = {165},

  pages = {320},

  url = {http://www.imedea.uib.es/pub_download.php?id=141}

}

Buric, N.; Cartwright, J. H. E.; Percival, I. C. & Piro, O. On Modular Smoothing and Scaling Functions for Mode Locking 1992 invalid journal
Vol. 163, pp. 63-67 
article URL 
Abstract: On modular smoothing and scaling functions for mode locking

As postscript (2 Mb)
or Gzip-compressed postscript (0.2 Mb).
BibTeX:

@article{IMEDEA_intranet:142,

  author = {Buric, N. and Cartwright, J. H. E. and Percival, I. C. and Piro, O.},

  title = {On Modular Smoothing and Scaling Functions for Mode Locking},

  journal = {invalid journal},

  year = {1992},

  volume = {163},

  pages = {63--67},

  url = {http://www.imedea.uib.es/pub_download.php?id=142}

}

Cartwright, J. H. E. & Piro, O. The Dynamics of Runge-Kutta Methods 1992 invalid journal
Vol. 2, pp. 427-449 
article URL 
Abstract: The dynamics of Runge-Kutta methods

As postscript (4 Mb)
or Gzip-compressed postscript (0.5 Mb).
BibTeX:

@article{IMEDEA_intranet:143,

  author = {Cartwright, J. H. E. and Piro, O.},

  title = {The Dynamics of Runge-Kutta Methods},

  journal = {invalid journal},

  year = {1992},

  volume = {2},

  pages = {427--449},

  url = {http://www.imedea.uib.es/pub_download.php?id=143}

}

DAngelo, E. J.; Green, C.; Tredicce, J. R.; Abraham, N. B.; Z. Chen, Z. & Balle, S. Symmetry Breaking, Dynamical Pulsations and Turbulence in the Transverse Intensity Patterns of a Laser: the Role Played by Defects 1992 Physica D
Vol. 61, pp. 6-24 
article URL 
Abstract:

Symmetry Breaking, Dynamical Pulsations and Turbulence in the Transverse Intensity Patterns of a Laser: the Role Played by Defects

BibTeX:

@article{IMEDEA_intranet:15,

  author = {DAngelo, E. J. and Green, C. and Tredicce, J. R. and Abraham, N. B. and Z. Chen, Z. and Balle, S.},

  title = {Symmetry Breaking, Dynamical Pulsations and Turbulence in the Transverse Intensity Patterns of a Laser: the Role Played by Defects},

  journal = {Physica D},

  year = {1992},

  volume = {61},

  pages = {6--24},

  url = {http://www.imedea.uib.es/pub_download.php?id=15}

}

Balle, S.; de Pasquale, F.; Abraham, N.B. & M. San Miguel, M. Statistics of the Transient Frequency Modulation in the Switch-On of a Single-Mode Semiconductor Laser 1992 Physical Review A - Atomic, Molecular, and Optical Physics
Vol. 45, pp. 1955-1966 
article URL 
Abstract:

Statistics of the Transient Frequency Modulation in the Switch-On of a Single-Mode Semiconductor Laser

BibTeX:

@article{IMEDEA_intranet:16,

  author = {Balle, S. and de Pasquale, F. and Abraham, N.B. and M. San Miguel, M.},

  title = {Statistics of the Transient Frequency Modulation in the Switch-On of a Single-Mode Semiconductor Laser},

  journal = {Physical Review A - Atomic, Molecular, and Optical Physics},

  year = {1992},

  volume = {45},

  pages = {1955--1966},

  url = {http://www.imedea.uib.es/pub_download.php?id=16}

}

Balle, S.; Colet, P. & San Miguel, M. Statistics for the Transient Response of Single-Mode Semiconductor Laser Gain Switching 1991 Physical Review A - Atomic, Molecular, and Optical Physics
Vol. 43, pp. 498-506 
article DOI URL 
Abstract:

 

BibTeX:

@article{IMEDEA_intranet:17,

  author = {Balle, S. and Colet, P. and San Miguel, M.},

  title = {Statistics for the Transient Response of Single-Mode Semiconductor Laser Gain Switching},

  journal = {Physical Review A - Atomic, Molecular, and Optical Physics},

  year = {1991},

  volume = {43},

  pages = {498--506},

  url = {http://www.imedea.uib.es/pub_download.php?id=17},

  doi = {http://dx.doi.org/10.1103/PhysRevA.43.498}

}

Balle, S.; San Miguel, M. & De Pasquale, F. Statistics for the Switch-On of a Laser with Injected Signal 1991 Procedings
Vol. 7, pp. 449-451 
inproceedings URL 
Abstract:

Statistics for the Switch-On of a Laser with Injected Signal

BibTeX:

@inproceedings{IMEDEA_intranet:18,

  author = {Balle, S. and San Miguel, M. and De Pasquale, F.},

  title = {Statistics for the Switch-On of a Laser with Injected Signal},

  journal = {Procedings},

  year = {1991},

  volume = {7},

  pages = {449--451},

  url = {http://www.imedea.uib.es/pub_download.php?id=18}

}

García, P.; S. Balle, S. & Bermejo, F. J. Output Properties of Nondegenerate Parametric Amplifiers with Nonhomogeneous Absorption Losses 1991 Journal of Modern Optics
Vol. 38, pp. 2349 
article URL 
Abstract:

The noise properties of non-degenerate parametric amplifiers with
absorption losses which are different for the two beams are analysed by means of a
semiclassical approach which enables the direct derivation of the Langevin
equations for the optical fields from the quantum Heisenberg equations . Several
statistical quantities are calculated and the implications of the present results for
sub shot-noise absorption measurements are discussed finally .

BibTeX:

@article{IMEDEA_intranet:206,

  author = {García, P. and S. Balle, S. and Bermejo, F. J.},

  title = {Output Properties of Nondegenerate Parametric Amplifiers with Nonhomogeneous Absorption Losses},

  journal = {Journal of Modern Optics},

  year = {1991},

  volume = {38},

  pages = {2349},

  url = {http://www.imedea.uib.es/pub_download.php?id=206}

}

Balle, S.; San Miguel, M.; De Pasquale, F. & Abraham, N. B. Intensity Statistics and Spatial Correlation Functions in a Noise Driven Unidirectional Laser Amplifier 1991 Optics Communications
Vol. 85, pp. 104-116 
article URL 
Abstract:

Intensity Statistics and Spatial Correlation Functions in a Noise Driven Unidirectional Laser Amplifier

BibTeX:

@article{IMEDEA_intranet:56,

  author = {Balle, S. and San Miguel, M. and De Pasquale, F. and Abraham, N. B.},

  title = {Intensity Statistics and Spatial Correlation Functions in a Noise Driven Unidirectional Laser Amplifier},

  journal = {Optics Communications},

  year = {1991},

  volume = {85},

  pages = {104--116},

  url = {http://www.imedea.uib.es/pub_download.php?id=56}

}

Balestri, S.; Ciofini, M.; Meucci, R.; Arecchi, F.T.; Colet, P.; San Miguel, M. & Balle, S. CO2 Laser with Swept Pump Parameter. The Nonlinear Regime 1991 Physical Review A - Atomic, Molecular, and Optical Physics
Vol. 44, pp. 5894-5897 
article URL 
Abstract:

Abstract

BibTeX:

@article{IMEDEA_intranet:92,

  author = {Balestri, S. and Ciofini, M. and Meucci, R. and Arecchi, F.T. and Colet, P. and San Miguel, M. and Balle, S.},

  title = {CO2 Laser with Swept Pump Parameter. The Nonlinear Regime},

  journal = {Physical Review A - Atomic, Molecular, and Optical Physics},

  year = {1991},

  volume = {44},

  pages = {5894--5897},

  url = {http://www.imedea.uib.es/pub_download.php?id=92}

}

Abraham, N. B.; S. Balle, S.; Chen, Z.; DAngelo, E. J. & Tredicce, J. R. Defect Dynamics in the Evolution of the Transverse Pattern of a Laser 1991 Proceedings of the SPIE(1840), pp. 156-165  inproceedings URL 
Abstract:

Defect Dynamics in the Evolution of the Transverse Pattern of a Laser

BibTeX:

@inproceedings{IMEDEA_intranet:94,

  author = {Abraham, N. B. and S. Balle, S. and Chen, Z. and DAngelo, E. J. and Tredicce, J. R.},

  title = {Defect Dynamics in the Evolution of the Transverse Pattern of a Laser},

  journal = {Proceedings of the SPIE},

  year = {1991},

  number = {1840},

  pages = {156--165},

  url = {http://www.imedea.uib.es/pub_download.php?id=94}

}

Bermejo, F. J.; García-Fernández, P.; Balle, S.; Colet, P.; Toral, R. & San Miguel, M. Langevin Equations for Squeezing by Means of Nonlinear Optical Devices 1991 Nonlinear Dynamics and Quantum Phenomena in Optical Systems, pp. 65-73  inbook URL 
Abstract: Langevin Equations for Squeezing by Means of Nonlinear Optical Devices
BibTeX:

@inbook{IMEDEA_intranet:95,

  author = {Bermejo, F. J. and García-Fernández, P. and Balle, S. and Colet, P. and Toral, R. and San Miguel, M.},

  title = {Langevin Equations for Squeezing by Means of Nonlinear Optical Devices},

  booktitle = {Nonlinear Dynamics and Quantum Phenomena in Optical Systems},

  publisher = {Springer-Verrlag, R. Vilaseca and R. Corbalán},

  year = {1991},

  pages = {65--73},

  url = {http://www.imedea.uib.es/pub_download.php?id=95}

}

Balle, S.; Colet, P. & San Miguel, M. Relation between Passage Time and Maximum Intensity in Semiconductor Laser Gain Switching 1991 Nonlinear Dynamics and Quantum Phenomena in Optical Systems, pp. 293-297  inbook URL 
Abstract: Relation between Passage Time and Maximum Intensity in Semiconductor Laser Gain Switching
BibTeX:

@inbook{IMEDEA_intranet:98,

  author = {Balle, S. and Colet, P. and San Miguel, M.},

  title = {Relation between Passage Time and Maximum Intensity in Semiconductor Laser Gain Switching},

  booktitle = {Nonlinear Dynamics and Quantum Phenomena in Optical Systems},

  publisher = {Springer-Verlag, R. Vilaseca & R. Corbalán},

  year = {1991},

  pages = {293--297},

  url = {http://www.imedea.uib.es/pub_download.php?id=98}

}

Costa-Quintana, J.; F., Lopez-Aguilar; S., Balle & R., Salvador Quasiparticle band structure for the Hubbard systems: Application to -CeAl2 1990 Physical Review B
Vol. 41(10), pp. 7096-7102 
article DOI URL 
Abstract:

A self-energy formalism for determining the quasiparticle band structure of the Hubbard systems is deduced. The self-energy is obtained from the dynamically screened Coulomb interaction whose bare value is the correlation energy U. A method for integrating the Schrödingerlike equation with the self-energy operator is given. The method is applied to the cubic Laves phase of -CeAl2 because it is a clear Hubbard system with a very complex electronic structure and, moreover, this system provides us with sufficient experimental data for testing our method. © 1990 The American Physical Society.

BibTeX:

@article{IMEDEA_intranet:218,

  author = {Costa-Quintana, J. and Lopez-Aguilar F. and Balle S. and Salvador R.},

  title = {Quasiparticle band structure for the Hubbard systems: Application to -CeAl2},

  journal = {Physical Review B},

  year = {1990},

  volume = {41},

  number = {10},

  pages = {7096--7102},

  url = {http://www.imedea.uib.es/pub_download.php?id=218},

  doi = {http://dx.doi.org/10.1103/PhysRevB.41.7096}

}

Hu, B.; Valinia, A. & Piro, O. Universality and Asymptotic Limits of the Scaling Exponents in Circle Maps 1990 invalid journal
Vol. 144, pp. 7 
article URL 
Abstract: Universality and Asymptotic Limits of the Scaling Exponents in Circle Maps
BibTeX:

@article{IMEDEA_intranet:220,

  author = {Hu, B. and Valinia, A. and Piro, O.},

  title = {Universality and Asymptotic Limits of the Scaling Exponents in Circle Maps},

  journal = {invalid journal},

  year = {1990},

  volume = {144},

  pages = {7},

  url = {http://www.imedea.uib.es/pub_download.php?id=220}

}

Feingold, M.; Littlejohn, R. G.; Pehling, J. S.; Piro, O. & Solina, S. B. Scars in Billiards: The Phase Space Approach 1990 invalid journal
Vol. 146, pp. 199 
article URL 
Abstract: Scars in Billiards: The Phase Space Approach
BibTeX:

@article{IMEDEA_intranet:221,

  author = {Feingold, M. and Littlejohn, R. G. and Pehling, J. S. and Piro, O. and Solina, S. B.},

  title = {Scars in Billiards: The Phase Space Approach},

  journal = {invalid journal},

  year = {1990},

  volume = {146},

  pages = {199},

  url = {http://www.imedea.uib.es/pub_download.php?id=221}

}

Feingold, M.; González, D. L.; Magnasco, M. O. & Piro, O. On the Universality Class Dependence of Period Doubling Indices 1990 invalid journal
Vol. 156, pp. 272 
article URL 
Abstract: On the Universality Class Dependence of Period Doubling Indices
BibTeX:

@article{IMEDEA_intranet:222,

  author = {Feingold, M. and González, D. L. and Magnasco, M. O. and Piro, O.},

  title = {On the Universality Class Dependence of Period Doubling Indices},

  journal = {invalid journal},

  year = {1990},

  volume = {156},

  pages = {272},

  url = {http://www.imedea.uib.es/pub_download.php?id=222}

}

Balle, S.; F., De Pasquale & San Miguel, M. Passage Time Calculation for the Detection of Weak Signals via the Transient Dynamics of a Laser 1990 Physical Review A - Atomic, Molecular, and Optical Physics
Vol. 41, pp. 5012-5015 
article URL 
Abstract:

Passage Time Calculation for the Detection of Weak Signals via the Transient Dynamics of a Laser

BibTeX:

@article{IMEDEA_intranet:39,

  author = {Balle, S. and De Pasquale F. and San Miguel, M.},

  title = {Passage Time Calculation for the Detection of Weak Signals via the Transient Dynamics of a Laser},

  journal = {Physical Review A - Atomic, Molecular, and Optical Physics},

  year = {1990},

  volume = {41},

  pages = {5012--5015},

  url = {http://www.imedea.uib.es/pub_download.php?id=39}

}

López-Aguilar, F.; Balle, S. & Costa-Quintana, J. Quasiparticle States in f-electron Compounds from the Multiband Hubbard Model 1989 Physical Review B
Vol. 39, pp. 9591 
article URL 
Abstract:

Quasiparticle States in f-electron Compounds from the Multiband Hubbard Model

BibTeX:

@article{IMEDEA_intranet:241,

  author = {López-Aguilar, F. and Balle, S. and Costa-Quintana, J.},

  title = {Quasiparticle States in f-electron Compounds from the Multiband Hubbard Model},

  journal = {Physical Review B},

  year = {1989},

  volume = {39},

  pages = {9591},

  url = {http://www.imedea.uib.es/pub_download.php?id=241}

}

Costa-Quintana, J.; López-Aguilar, F.; Balle, S. & Salvador, R. Electronic Structure of YBa2Cu3O7-d Including Strong Correlation Effects 1989 Physical Review B
Vol. 39, pp. 9675 
article URL 
Abstract:

Electronic Structure of YBa2Cu3O7-d Including Strong Correlation Effects

BibTeX:

@article{IMEDEA_intranet:242,

  author = {Costa-Quintana, J. and López-Aguilar, F. and Balle, S. and Salvador, R.},

  title = {Electronic Structure of YBa2Cu3O7-d Including Strong Correlation Effects},

  journal = {Physical Review B},

  year = {1989},

  volume = {39},

  pages = {9675},

  url = {http://www.imedea.uib.es/pub_download.php?id=242}

}

López-Aguilar, F.; Costa-Quintana, J. & Balle, S. Hubbard Systems with Two Channels for the Localisation 1989 Physica Status Solidi (B): Basic Research
Vol. 152, pp. 543 
article URL 
Abstract: Hubbard Systems with Two Channels for the Localisation
BibTeX:

@article{IMEDEA_intranet:243,

  author = {López-Aguilar, F. and Costa-Quintana, J. and Balle, S.},

  title = {Hubbard Systems with Two Channels for the Localisation},

  journal = {Physica Status Solidi (B): Basic Research},

  year = {1989},

  volume = {152},

  pages = {543},

  url = {http://www.imedea.uib.es/pub_download.php?id=243}

}

Feingold, M.; Kadanoff, L. P. & Piro, O. Transport of Passive Scalars: KAM Surfaces and Difussion in Three Dimensional Liouvillean Maps 1989 invalid journal  article URL 
BibTeX:

@article{IMEDEA_intranet:245,

  author = {Feingold, M. and Kadanoff, L. P. and Piro, O.},

  title = {Transport of Passive Scalars: KAM Surfaces and Difussion in Three Dimensional Liouvillean Maps},

  journal = {invalid journal},

  year = {1989},

  url = {http://www.imedea.uib.es/pub_download.php?id=245}

}

Campbell, A.; González, A.; González, D. L.; Piro, O. & Larrondo, H. A. Isochrones and the Dynamics of Kicked Oscillators 1989 Physica A
Vol. 155, pp. 565 
article URL 
Abstract: Isochrones and the Dynamics of Kicked Oscillators
BibTeX:

@article{IMEDEA_intranet:246,

  author = {Campbell, A. and González, A. and González, D. L. and Piro, O. and Larrondo, H. A.},

  title = {Isochrones and the Dynamics of Kicked Oscillators},

  journal = {Physica A},

  year = {1989},

  volume = {155},

  pages = {565},

  url = {http://www.imedea.uib.es/pub_download.php?id=246}

}

González, D. L.; Piro, O.; Savino, G. & Valentinuzi, J. Evidences of Chaotic Dynamics in Driven Toad Ventricles 1989 invalid journal
Vol. 56, pp. 273 
article URL 
Abstract: Evidences of Chaotic Dynamics in Driven Toad Ventricles
BibTeX:

@article{IMEDEA_intranet:247,

  author = {González, D. L. and Piro, O. and Savino, G. and Valentinuzi, J.},

  title = {Evidences of Chaotic Dynamics in Driven Toad Ventricles},

  journal = {invalid journal},

  year = {1989},

  volume = {56},

  pages = {273},

  url = {http://www.imedea.uib.es/pub_download.php?id=247}

}

Feingold, M.; Leitner, D. & Piro, O. Semiclassical Structure of Hamiltonians and Localization 1989 invalid journal
Vol. 144, pp. 7 
article URL 
Abstract: Semiclassical Structure of Hamiltonians and Localization
BibTeX:

@article{IMEDEA_intranet:248,

  author = {Feingold, M. and Leitner, D. and Piro, O.},

  title = {Semiclassical Structure of Hamiltonians and Localization},

  journal = {invalid journal},

  year = {1989},

  volume = {144},

  pages = {7},

  url = {http://www.imedea.uib.es/pub_download.php?id=248}

}

Costa-Quintana, J.; López-Aguilar, F.; Balle, S.; Mu noz, J. S. & Sánchez, A. Coulomb Correlation Effects in YCuOBa Systems 1989 Physica C
Vol. 162-164, pp. 757 
article URL 
Abstract: Coulomb Correlation Effects in YCuOBa Systems
BibTeX:

@article{IMEDEA_intranet:249,

  author = {Costa-Quintana, J. and López-Aguilar, F. and Balle, S. and Muñoz, J. S. and Sánchez, A.},

  title = {Coulomb Correlation Effects in YCuOBa Systems},

  journal = {Physica C},

  year = {1989},

  volume = {162-164},

  pages = {757},

  url = {http://www.imedea.uib.es/pub_download.php?id=249}

}

López-Aguilar, F.; Costa-Quintana, J.; Balle, S.; Aurell, M. T.; Sánchez, A. & Mu noz, J. S. Dielectric Response in high-Tc Superconductors 1989 Physica C
Vol. 162-164, pp. 759 
article URL 
Abstract: Dielectric Response in high-Tc Superconductors
BibTeX:

@article{IMEDEA_intranet:250,

  author = {López-Aguilar, F. and Costa-Quintana, J. and Balle, S. and Aurell, M. T. and Sánchez, A. and Muñoz, J. S.},

  title = {Dielectric Response in high-Tc Superconductors},

  journal = {Physica C},

  year = {1989},

  volume = {162-164},

  pages = {759},

  url = {http://www.imedea.uib.es/pub_download.php?id=250}

}

Balle, S.; Costa-Quintana, J. & F., López-Aguilar. Method for analyzing the ground state of intermediate-valence systems: Application to metallic SmS 1988 Physical Review B
Vol. 37, pp. 6615-6621 
article URL 
Abstract:

Method for analyzing the ground state of intermediate-valence systems: Application to metallic SmS

BibTeX:

@article{IMEDEA_intranet:10014,

  author = {Balle, S. and Costa-Quintana, J. and López-Aguilar. F.},

  title = {Method for analyzing the ground state of intermediate-valence systems: Application to metallic SmS},

  journal = {Physical Review B},

  year = {1988},

  volume = {37},

  pages = {6615--6621},

  url = {http://www.imedea.uib.es/pub_download.php?id=10014}

}

López-Aguilar, F.; Balle, S. & Costa-Quintana, J. Realistic treatment of the self-energy formalism in heavy-fermion metals: Application to superconducting phases of CeRu_2 and CeOs_2 1988 Physical Review B
Vol. 38, pp. 163-169 
article URL 
Abstract:

Realistic treatment of the self-energy formalism in heavy-fermion metals: Application to superconducting phases of CeRu_2 and CeOs_2

BibTeX:

@article{IMEDEA_intranet:10015,

  author = {F. López-Aguilar and S. Balle and J. Costa-Quintana},

  title = {Realistic treatment of the self-energy formalism in heavy-fermion metals: Application to superconducting phases of CeRu_2 and CeOs_2},

  journal = {Physical Review B},

  year = {1988},

  volume = {38},

  pages = {163--169},

  url = {http://www.imedea.uib.es/pub_download.php?id=10015}

}

Balle, S.; López-Aguilar, F. & Costa-Quintana, J. Electronic structure of the superconducting phase of CeOs_x Ru_2-x 1988 Physica C
Vol. 153-155, pp. 1245-1246 
article URL 
Abstract: Electronic structure of the superconducting phase of CeOs_x Ru_2-x
BibTeX:

@article{IMEDEA_intranet:10016,

  author = {S. Balle and F. López-Aguilar and J. Costa-Quintana},

  title = {Electronic structure of the superconducting phase of CeOs_x Ru_2-x},

  journal = {Physica C},

  year = {1988},

  volume = {153-155},

  pages = {1245--1246},

  url = {http://www.imedea.uib.es/pub_download.php?id=10016}

}

López-Aguilar, F.; Balle, S. & Costa-Quintana, J. Dynamic potentials for unstable narrow band systems 1988 Physica Status Solidi (B): Basic Research
Vol. 149, pp. 585-593 
article URL 
Abstract:

Dynamic potentials for unstable narrow band systems

BibTeX:

@article{IMEDEA_intranet:10017,

  author = {F. López-Aguilar and S. Balle and J. Costa-Quintana},

  title = {Dynamic potentials for unstable narrow band systems},

  journal = {Physica Status Solidi (B): Basic Research},

  year = {1988},

  volume = {149},

  pages = {585--593},

  url = {http://www.imedea.uib.es/pub_download.php?id=10017}

}

Balle, S.; F., Lopez-Aguilar & J., Costa-Quintana Electronic structure of ReBaCuO systems 1988 Journal of Magnetism and Magnetic Materials
Vol. 76(C), pp. 579-581 
article URL 
Abstract: The band structure of the CuO superconducting systems has been determined from a nonlocal band Hamiltonian. We have performed two calculations with Ud = 0 and Ud = 4 eV and compare both results with the available experimental results of the direct and inverse photoemission. © 1988.
BibTeX:

@article{IMEDEA_intranet:10018,

  author = {Balle, S. and Lopez-Aguilar F. and Costa-Quintana J.},

  title = {Electronic structure of ReBaCuO systems},

  journal = {Journal of Magnetism and Magnetic Materials},

  year = {1988},

  volume = {76},

  number = {C},

  pages = {579--581},

  url = {http://www.imedea.uib.es/pub_download.php?id=10018}

}

Balle, S.; Lopez-Aguilar, F. & Costa-Quintana, J. f-f and f-d pseudopotential model applied to the band structures of Ce-systems 1987 Journal of Magnetism and Magnetic Materials
Vol. 63(C), pp. 652-654 
article URL 
Abstract:

In this paper we introduce a pseudopotential model which includes the f-f and f-d Coulomb effects along with f-d hybridisation into the electronic structure of the Ce-systems. © 1987.

BibTeX:

@article{IMEDEA_intranet:10012,

  author = {Balle, S. and Lopez-Aguilar, F. and Costa-Quintana, J.},

  title = {f-f and f-d pseudopotential model applied to the band structures of Ce-systems},

  journal = {Journal of Magnetism and Magnetic Materials},

  year = {1987},

  volume = {63},

  number = {C},

  pages = {652--654},

  url = {http://www.imedea.uib.es/pub_download.php?id=10012}

}

S., Balle; J., Costa-Quintana & F., Lopez-Aguilar f STRUCTURES IN THE NON-MAGNETIC PHASE OF CeOs//2. 1987 Journal of Physics C-Solid State Physics
Vol. 20(13), pp. l223-l228 
article URL 
Abstract: The density of states and the band structure of the cubic phase of non-magnetic CeOs//2 is determined. The splitting between the different 4f structures is analyzed and the experimental results related to the large peaks that appear in the DOS at the Fermi level are interpreted.
BibTeX:

@article{IMEDEA_intranet:10013,

  author = {Balle S. and Costa-Quintana J. and Lopez-Aguilar F.},

  title = {f STRUCTURES IN THE NON-MAGNETIC PHASE OF CeOs//2.},

  journal = {Journal of Physics C-Solid State Physics},

  year = {1987},

  volume = {20},

  number = {13},

  pages = {l223--l228},

  url = {http://www.imedea.uib.es/pub_download.php?id=10013}

}

A. Scire, J. Mulet, C. Mirasso J. Danckaert & Miguel, M. San Vectorial chaos synchronization and polarization message encoding in vertical-cavity surface-emitting lasers 1985 Physical Review Letters
Vol. 90, pp. 113901 
article URL 
BibTeX:

@article{IMEDEA_intranet:998,

  author = {A. Scire, J. Mulet, C. Mirasso, J. Danckaert and M. San Miguel},

  title = {Vectorial chaos synchronization and polarization message encoding in vertical-cavity surface-emitting lasers},

  journal = {Physical Review Letters},

  year = {1985},

  volume = {90},

  pages = {113901},

  url = {http://www.imedea.uib.es/pub_download.php?id=998}

}