Now showing items 1-19 of 19

  • Are the spikes emitted by a semiconductor laser with feedback similar to neuronal spikes? 

    Quintero Quiroz, Carlos Alberto; Amaral Sorrentino, Taciano; Aragoneses, Andrés; Torrent Serra, Maria del Carmen; Masoller Alonso, Cristina (2017)
    Conference report
    Restricted access - publisher's policy
    We study experimentally a semiconductor laser operating in a feedback-induced regime known as low frequency fluctuations (LFFs), in which the laser emits a spiking output that resembles the spikes of biological neurons. ...
  • Design methodology of a ceilometer lidar prototype 

    Gregorio, Eduard; Rocadenbosch Burillo, Francisco; Comerón Tejero, Adolfo (2007)
    Conference report
    Restricted access - publisher's policy
    This article presents step-by-step applied methodology to design a 905-nm 5-kHz rep. rate diode-laser biaxial lidar ceilometer prototype beginning from the definition of initial specs, and related trade-offs to the first ...
  • Diode laser operation under orthogonal feedback : experiments and theory 

    Sorrentino, T.; Masoller Alonso, Cristina; Soares, C.; Vidal, I.; Oria, Marcos (2011)
    Conference report
    Open Access
    We report experimental and numerical investigations concerning semiconductor lasers emission under polarization-rotated feedback. We experimentally observe that for some semiconductor lasers the weak TM mode does lase even ...
  • Diseño de un método para aplicar ruido dicotómico a la corriente de inyección de un láser de semiconductor 

    Goyeneche Marimon, Luis (Universitat Politècnica de Catalunya, 2010-01)
    Master thesis (pre-Bologna period)
    Open Access
  • Effects of periodic forcing on the temporally correlated spikes of a semiconductor laser with feedback 

    Amaral Sorrentino, Taciano; Quintero Quiroz, Carlos Alberto; Aragoneses Aguado, Andrés; Torrent Serra, Maria del Carmen; Masoller Alonso, Cristina (2015-03-09)
    Article
    Open Access
    Optical excitable devices that mimic neuronal behavior can be building-blocks of novel, brain-inspired information processing systems. A relevant issue is to understand how such systems represent, via correlated spikes, ...
  • Experimental and numerical study of the symbolic dynamics of a modulated external-cavity semiconductor laser 

    Aragoneses Aguado, Andrés; Sorrentino Amaral, Taciano; Perrone, Sandro; Gauthier, Daniel; Torrent Serra, Maria del Carmen; Masoller Alonso, Cristina (2014-02-21)
    Article
    Open Access
    We study the symbolic dynamics of a stochastic excitable optical system with periodic forcing. Specifically, we consider a directly modulated semiconductor laser with optical feedback in the low frequency fluctuations (LFF) ...
  • Experimental characterization of the transition to coherence collapse in a semiconductor laser with optical feedback 

    Panozzo, M.; Quintero Quiroz, Carlos Alberto; Tiana Alsina, Jordi; Torrent Serra, Maria del Carmen; Masoller Alonso, Cristina (Institute of Physics (IOP), 2017-11-01)
    Article
    Open Access
    Semiconductor lasers with time-delayed optical feedback display a wide range of dynamical regimes, which have found various practical applications. They also provide excellent testbeds for data analysis tools for characterizing ...
  • Experimental study of modulation waveforms for entraining the spikes emitted by a semiconductor laser with optical feedback 

    Tiana Alsina, Jordi; Quintero Quiroz, Carlos Alberto; Panozzo, M.; Torrent Serra, Maria del Carmen; Masoller Alonso, Cristina (2018-04-02)
    Article
    Open Access
    The entrainment phenomenon, by which an oscillator adjusts its natural rhythm to an external periodic signal, has been observed in many natural systems. Recently, attention has focused on which are the optimal conditions ...
  • Generation of extreme pulses on demand in semiconductor lasers with optical injection 

    Tian, Jin; Chen, Siyu; Masoller Alonso, Cristina (2017-12-11)
    Article
    Open Access
    The generation of extreme intensity pulses in an optically injected semiconductor laser is studied numerically by using a well-known rate equation model. We show that step-up perturbations of the laser pump current can ...
  • Laser feedback interferometry with semiconductor lasers 

    García Gómez, Pablo (Universitat Politècnica de Catalunya, 2017-06)
    Bachelor thesis
    Open Access
    Covenantee:  University of Queensland
    Laser Feedback Interferometry is based on the self-mixing effect. When light emitted from a laser reflects in a target and is reinjected into its cavity, the optical parameters of the laser change providing information ...
  • Multidimensional subwavelength position sensing using a semiconductor laser with optical feedback 

    Cohen, Seth; Aragoneses Aguado, Andrés; Rontani, Damien; Torrent Serra, Maria del Carmen; Masoller Alonso, Cristina; Gauthier, Daniel (2013-11-01)
    Article
    Open Access
    We demonstrate experimentally how to harness quasi-periodic dynamics in a semiconductor laser with dual optical feedback for measuring subwavelength changes in each arm of the cavity simultaneously. We exploit the ...
  • Optical power model of a laser bar diode 

    Borràs Cristòfol, Ramon; Río Fernandez, Joaquín del; Oriach, Carles; Juliachs, Jordi (Institute of Physics (IOP), 2018)
    Conference report
    Open Access
    This article proposes a modelling method for laser diodes optical output power including its dependency on temperature. The device used for this study is a 40 W Monocrom's diode, with 808 nm wavelength emitted light and ...
  • Perspective of remote optical measurement techniques 

    Gregorio, Eduard; Rocadenbosch Burillo, Francisco (2007)
    Conference report
    Restricted access - publisher's policy
    This article presents an intercomparison between four different ROMTs: differential optical absorption spectroscopy (DOAS), differential absorption LIDAR (DIAL), Fourier transform infrared spectroscopy (FTIR), and tunable ...
  • Practical method for modelling the nonlinear behaviour of a travelling wave semiconductor optical amplifier 

    Ruiz Moreno, Sergio; Guitart Felip, Jorge (1993-02)
    Article
    Open Access
    The authors present a simple model of a travelling wave semiconductor optical amplifier with an appreciable degree of saturation. The model uses a particular way of linearising the total carrier recombination R(N) to find ...
  • Rogue waves in injected semiconductor lasers with current modulation: role of the modulation phase 

    Ahuja, Jatin; Nalawade, Dhananjay Bhiku; Zamora Munt, Jordi; Vilaseca Alavedra, Ramon; Masoller Alonso, Cristina (2014-11-17)
    Article
    Restricted access - publisher's policy
    Semiconductor lasers with continuous-wave optical injection display a rich variety of behaviors, including stable locking, periodic or chaotic oscillations, excitable pulses, etc. Within the chaotic regime it has been shown ...
  • Square-wave switching in vertical-cavity surface-emitting lasers with polarization-rotated optical feedback: Experiments and simulations 

    Sukow, David; Gilfillan, Taylor; Pope, Brenton; Torre, Maria S.; Gavrielides, A.; Masoller Alonso, Cristina (2012-09-12)
    Article
    Open Access
    We study experimentally the dynamics of vertical-cavity surface-emitting lasers (VCSELs) with polarization-rotated (PR) optical feedback, such that the natural lasing polarization of a VCSEL is rotated by 90 deg and then ...
  • Stabilization of Broad Area Semiconductor Amplifiers and Lasers by Double Modulation of Pump and Refractive Index 

    Ahmed, W. W.; Kumar, Shubham; Medina Pardell, Judith; Botey Cumella, Muriel; Herrero Simon, Ramon; Staliunas, Kestutis (Institute of Electrical and Electronics Engineers (IEEE), 2018)
    Conference report
    Restricted access - publisher's policy
    Broad Area Semiconductor Amplifiers and Lasers display instability of the homogeneous state typically related with self-focusing nonlinearities, inducing multi-transverse mode operation and filamentation that deteriorates ...
  • Stabilization of Broad Area Semiconductor Laser Sources 

    Medina Pardell, Judith; Ahmed, W. W.; Kumar, Shubham; Botey Cumella, Muriel; Herrero Simon, Ramon; Staliunas, Kestutis (Institute of Electrical and Electronics Engineers (IEEE), 2018)
    Conference report
    Open Access
    We numerically proof the stabilization of broad area semiconductor laser sources by introducing simultaneous in-phase two-dimensional modulations on the refractive index and on the pump (gain). We also examine the interplay ...
  • Stabilization of broad-area semiconductor laser sources by simultaneous index and pump modulations 

    Waseem Ahmed, Waqas; Kumar, Shubham; Medina Pardell, Judith; Botey Cumella, Muriel; Herrero Simon, Ramon; Staliunas, Kestutis (2018-06-01)
    Article
    Open Access
    We show that the emission of broad-area semiconductor amplifiers and lasers can be efficiently stabilized by introducing two-dimensional periodic modulations simultaneously on both the refractive index and the pump (gain–loss) ...