Exploració per autor "Masoller Alonso, Cristina"Més informacióMés informació

Ara es mostren els items 113-132 de 138

    • Random delays and the synchronization of chaotic maps 

      Masoller Alonso, Cristina; Marti, Arturo C (American Institute of Physics (AIP), 2005-04)
      Article
      Accés restringit per política de l'editorial
      We investigate the dynamics of an array of chaotic logistic maps coupled with random delay times. We report that for adequate coupling strength the array is able to synchronize, in spite of the random delays. Specifically, ...

    • Remote recovery of audio signals from videos of optical speckle patterns: a comparative study of signal recovery algorithms 

      Halpaap Halpaap, Herbert Donatus; Amil Marletti, Pablo; Tiana Alsina, Jordi; Masoller Alonso, Cristina; Barcellona, Concetta (2020-03-16)
      Article
      Accés obert
      Optical remote sensors are nowadays ubiquitously used, thanks to unprecedented advances in the last decade in photonics, machine learning and signal processing tools. In this work we study experimentally the remote recovery ...

    • Roadmap on optical rogue waves and extreme events 

      Akhmediev, N; Kibler, Bertrand; Baronio, Fabio; Masoller Alonso, Cristina (Institute of Physics (IOP), 2016-04-26)
      Article
      Accés obert
      The pioneering paper 'Optical rogue waves' by Solli et al (2007 Nature 450 1054) started the new subfield in optics. This work launched a great deal of activity on this novel subject. As a result, the initial concept has ...

    • 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
      Accés restringit per política de l'editorial
      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 ...

    • Rogue waves in optically injected lasers: origin, predictability, and suppression 

      Zamora Munt, Jordi; Garbin, Bruno; Barland, Stéphane; Giudici, Massimo; Rios Leite, José R.; Masoller Alonso, Cristina; Tredicce, Jorge R. (2013-03-07)
      Article
      Accés obert
      Rogue waves are devastating extreme events that occur in many natural systems, and a lot of work has focused on predicting and understanding their origin. In optically injected semiconductor lasers rogue waves are rare ...

    • Semiconductor light sources 

      Masoller Alonso, Cristina (Universitat Politècnica de Catalunya, 2021-01)
      Apunts
      Accés obert

    • Small lasers, biomedical lasers and applications 

      Masoller Alonso, Cristina (Universitat Politècnica de Catalunya, 2021-01)
      Apunts
      Accés obert

    • Spatial permutation entropy distinguishes resting brain states 

      Boaretto, Bruno R.; Budzinski, Roberto C.; Rossi, Kalel L.; Masoller Alonso, Cristina; Macau, Elbert E.N. (Elsevier, 2023-06)
      Article
      Accés obert
      We use ordinal analysis and spatial permutation entropy to distinguish between eyes-open and eyes-closed resting brain states. To do so, we analyze EEG data recorded with 64 electrodes from 109 healthy subjects, under two ...

    • Speckle reduction in double-pass retinal images 

      Halpaap Halpaap, Herbert Donatus; García Guerra, Carlos Enrique; Vilaseca Ricart, Meritxell; Masoller Alonso, Cristina (Nature, 2019-03-14)
      Article
      Accés obert

    • 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
      Accés obert
      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 ...

    • Stability and dynamical properties of the coexisting attractors of an external-cavity semiconductor laser 

      Masoller Alonso, Cristina; Abraham, N. B. (1998-02)
      Article
      Accés obert
      Coexisting attractors, which arise from different external-cavity modes of the same longitudinal mode of the solitary laser, retain distinct stability properties, particularly when the laser is biased far above threshold ...

    • State space reconstruction of spatially extended systems and of time delayed systems from the time series of a scalar variable 

      Quintero Quiroz, Carlos Alberto; Torrent Serra, Maria del Carmen; Masoller Alonso, Cristina (Institute of Physics (IOP), 2018-07-11)
      Article
      Accés obert
      The space-time representation of high-dimensional dynamical systems that have a well defined characteristic time scale has proven to be very useful to deepen the understanding of such systems and to uncover hidden features ...

    • Sub-threshold signal encoding in coupled FitzHugh-Nagumo neurons 

      Masoliver Vila, Maria; Masoller Alonso, Cristina (Nature, 2018-05-29)
      Article
      Accés obert
      Despite intensive research, the mechanisms underlying the neural code remain poorly understood. Recent work has focused on the response of a single neuron to a weak, sub-threshold periodic signal. By simulating the stochastic ...

    • Success rate analysis of the response of an excitable laser to periodic perturbations 

      Tiana Alsina, Jordi; Garbin, Bruno; Barland, Stéphane; Masoller Alonso, Cristina (2020-08-01)
      Article
      Accés obert
      We use statistical tools to characterize the response of an excitable system to periodic perturbations. The system is an optically injected semiconductor laser under pulsed perturbations of the phase of the injected field. ...

    • Synchronization regimes of optical-feedback-induced chaos in unidirectionally coupled semiconductor lasers 

      Locquet, A.; Masoller Alonso, Cristina; Mirasso, C. R. (2002-05)
      Article
      Accés obert
      We numerically study the synchronization of two unidirectionally coupled single-mode semiconductor lasers in a master-slave configuration. The master laser is an external-cavity laser that operates in a chaotic regime while ...

    • Synchronization via clustering in a small delay-coupled laser network 

      Martínez González, Cristina; Masoller Alonso, Cristina; Torrent Serra, Maria del Carmen; García Ojalvo, Jordi (2007-09)
      Article
      Accés restringit per política de l'editorial

    • Testing Critical Slowing Down as a Bifurcation Indicator in a Low-Dissipation Dynamical System 

      Marconi, Mathias; Métayer, Cyrille; Acquaviva, A; Boyer, Jean Marc; Gomel, A; Quiniou, Thomas; Masoller Alonso, Cristina; Giudici, Massimo; Tredicce, Jorge R. (American Institute of Physics (AIP), 2020-09-25)
      Article
      Accés obert
      We study a two-dimensional low-dissipation nonautonomous dynamical system, with a control parameter that is swept linearly in time across a transcritical bifurcation. We investigate the relaxation time of a perturbation ...

    • Time crystal dynamics in a weakly modulated stochastic time delayed system 

      Tiana Alsina, Jordi; Masoller Alonso, Cristina (Nature, 2022-03-22)
      Article
      Accés obert
      Time crystal oscillations in interacting, periodically driven many-particle systems are highly regular oscillations that persist for long periods of time, are robust to perturbations, and whose frequency difers from the ...

    • Timing jitter reduction in semiconductor lasers induced by optical injection 

      Duque Gijón, María; Quirce Teja, Ana; Tiana Alsina, Jordi; Masoller Alonso, Cristina; Valle Gutierrez, Ángel (2023-11-01)
      Article
      Accés restringit per política de l'editorial
      We present an experimental study of the effect of continuous-wave optical injection (OI) from a vertical-cavity surface-emitting laser (VCSEL) on the timing jitter of a gain-switched discrete-mode semiconductor laser (DML). ...

    • Topological data analysis of high resolution diabetic retinopathy images 

      Garside, Kathryn; Henderson, Robin; Makarenko, Irina; Masoller Alonso, Cristina (Public Library of Science (PLOS), 2019-05-24)
      Article
      Accés obert
      Diabetic retinopathy is a complication of diabetes that produces changes in the blood vessel structure in the retina, which can cause severe vision problems and even blindness. In this paper, we demonstrate that by identifying ...