Browsing by Subject "Semiconductor laser"
Now showing items 1-20 of 58
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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, ... -
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 ... -
Binary coherent beam combining with semiconductor TA at 705
(Universitat Politècnica de Catalunya, 2009-09-08)
Master thesis
Open AccessWe present a coherent-beam-combining (CBC) experiment using a 795 nm diode laser as a technique to achieve more power by combining two beams. Two Gaussian beams are made to interfere while controlling polarization, ... -
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 ... -
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 ... -
Control and enhancement of beam quality of broadarea semiconductor devices and arrays by multimode interference couplers and two-dimensional gain modulation
(Institute of Electrical and Electronics Engineers (IEEE), 2013)
Conference report
Open AccessIt is proposed to control the beam quality of broad-area semiconductor devices by two-dimensional structuring enforcing phase coherence across the device. First results based on MMI couplers are presented. -
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, ... -
Distinguishing signatures of determinism and stochasticity in spiking complex systems
(2013-05-07)
Article
Open Access -
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 ... -
Experimental and Numerical Study of Locking of Low-Frequency Fluctuations of a Semiconductor Laser with Optical Feedback
(2022-02)
Article
Open AccessWe study the output of a semiconductor laser with optical feedback operated in the lowfrequency fluctuations (LFFs) regime and subject to weak sinusoidal current modulation. In the LFF regime, the laser intensity exhibits ... -
Experimental and numerical study of the symbolic dynamics of a modulated external-cavity semiconductor laser
(2014-02-21)
Article
Open AccessWe 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 study of different LFF regimes in semiconductor lasers with an external cavity
(2011)
Conference lecture
Restricted access - publisher's policy
