Browsing by Subject "Làsers de semiconductors"
Now showing items 1-20 of 83
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Analysis of the spike rate and spike correlations in modulated semiconductor lasers with optical feedback
(2015-11-01)
Article
Open AccessWe investigate experimentally how changes in the external cavity length and dc current affect the mean interspike-interval (ISI) in a modulated semiconductor laser with optical feedback operating in the low-frequency ... -
Anticipation in the synchronization of chaotic semiconductor lasers with optical feedback
(2001-03-26)
Article
Open AccessThe synchronization of chaotic semiconductor lasers with optical feedback is studied numerically in a one-way coupling configuration, in which a small amount of the intensity of one laser (master laser) is injected coherently ... -
Are the spikes emitted by a semiconductor laser with feedback similar to neuronal spikes?
(2017)
Conference report
Restricted access - publisher's policyWe 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. ... -
Attosecond x - ray transient dynamics
(Universitat Politècnica de Catalunya, 2017-09-08)
Master thesis
Open Access -
Beam shaping in spatially modulated broad-area semiconductor amplifiers
(2012-12-15)
Article
Open AccessWe propose and analyze a beam-shaping mechanism that in broad-area semiconductor amplifiers occurs due to spatial pump modulation on a micrometer scale. The study, performed under realistic parameters and conditions, ... -
Beam-combining scheme of high-power broad-area semiconductor lasers with Lyot-filtered reinjection: modeling, simulations, and experiments
(2019-07-01)
Article
Open AccessA brightness- and power-scalable polarization beam-combining scheme for high-power, broad-area semiconduc-tor laser diodes is investigated numerically and experimentally. To achieve the beam combining, we employ Lyot-filtered ... -
Bifurcation to square-wave switching in orthogonally delay-coupled semiconductor lasers: Theory and experiment
(2011-08-22)
Article
Open AccessWe analyze the dynamics of two semiconductor lasers with so-called orthogonal time-delayed mutual coupling: the dominant TE (x) modes of each laser are rotated by 90∘ (therefore, TM polarization or y) before being coupled ... -
Broad area lasers beam quality improvement using photonic crystals
(Universitat Politècnica de Catalunya, 2017-10-27)
Master thesis
Restricted access - confidentiality agreementEdge-emitting broad area semiconductor lasers (BAL) have a wide range of applications due to their high power, however, are strongly limited by their beam quality. Here, we consider a BAL with an external cavity configuration ... -
Coexistence of attractors in a laser diode with optical feedback from a large external cavity
(1994-09)
Article
Open AccessThe coexistence of several attractors in the coherent collapsed state of a laser diode with optical feedback is investigated. These attractors are unstable tori that bifurcate from different external cavity modes. As the ... -
Comparing the dynamics of periodically forced lasers and neurons
(2019-10-21)
Article
Open AccessNeuromorphic photonics is a new paradigm for ultra-fast neuro-inspired optical computing that canrevolutionize information processing and artificial intelligence systems. To implement practicalphotonic neural networks is ... -
Comparison of two types of synchronization of external-cavity semiconductor lasers
(2002-01-01)
Article
Open AccessWe study numerically the synchronization of external-cavity semiconductor lasers in a master–slave configuration, based on a Lang–Kobayashi-type model. Depending on the feedback and coupling strengths, the slave laser ... -
Controlling the leader-laggard dynamics in delay-synchronized lasers
(2007)
Article
Restricted access - publisher's policy -
Controlling the likelihood of rogue waves in an optically injected semiconductor laser via direct current modulation
(2014-03-06)
Article
Open AccessExtreme and rare events are nowadays the object of intensive research. Rogue waves are extreme waves that appear suddenly in many natural systems, even in apparently calm situations. Here we study numerically the rogue ... -
Coupling-mediated ghost resonance in mutually injected lasers
(2005-03)
Article
Restricted access - publisher's policy -
Design of a phase locked loop for optical upconversion
(Universitat Politècnica de Catalunya, 2018-05)
Master thesis
Open AccessSilicon Photonics has become a key technology in the design of devices for the next generation of wireless communications. One of the most important challenges of 5G is the transport of microwave signals over fiber links, ... -
Diseño de un método para aplicar ruido dicotómico a la corriente de inyección de un láser de semiconductor
(Universitat Politècnica de Catalunya, 2010-01)
Master thesis (pre-Bologna period)
Open Access -
Distinguishing signatures of determinism and stochasticity in spiking complex systems
(2013-05-07)
Article
Open Access -
Dynamical behavior of delay-coupled semiconductor lasers
(Universitat Politècnica de Catalunya, 2009-01-30)
Doctoral thesis
Open AccessIn this Thesis we have presented the results of a set of experimental investigations of the dynamics of delay-coupled semiconductor lasers. The characterization of these systems includes topics such as the processing of ... -
Effects of periodic forcing on the temporally correlated spikes of a semiconductor laser with feedback
(2015-03-09)
Article
Open AccessOptical 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, ... -
Efficient generation of new optical wavelengths by means of second harmonic generation in AlGaAs Bragg reflection waveguides
(Universitat Politècnica de Catalunya, 2011-09-19)
Master thesis (pre-Bologna period)
Open AccessEnglish: In this project has been designed and implemented a setup to produce the nonlinear process of the second harmonic generation (SHG) in Bragg reflection waveguides (BRW). Starting with the adjustment of a tunable ...
