Browsing by Subject "Semiconductor lasers"
Now showing items 1-20 of 22
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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. ... -
Design methodology of a ceilometer lidar prototype
(2007)
Conference report
Restricted access - publisher's policyThis 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
(2011)
Conference report
Open AccessWe 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
(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
(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, ... -
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 characterization of the speckle pattern at the output of a multimode optical fiber
(2019-09-30)
Article
Open AccessSpeckle patterns produced by coherent waves interfering with each other are undesirable in many imaging applications (for example, in laser projection systems) but on the other hand, they contain useful information that ... -
Experimental characterization of the transition to coherence collapse in a semiconductor laser with optical feedback
(Institute of Physics (IOP), 2017-11-01)
Article
Open AccessSemiconductor 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
(2018-04-02)
Article
Open AccessThe 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 ... -
Exploiting the Nonlinear Dynamics of Optically Injected Semiconductor Lasers for Optical Sensing
(2019-06-01)
Article
Open AccessOptically injected semiconductor lasers are known to display a rich variety of dynamic behaviours, including the emission of excitable pulses, and of rare giant pulses (often referred to as optical rogue waves). Here, we ... -
Generation of extreme pulses on demand in semiconductor lasers with optical injection
(2017-12-11)
Article
Open AccessThe 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
(Universitat Politècnica de Catalunya, 2017-06)
Bachelor thesis
Open Access
Covenantee: University of QueenslandLaser 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
(2013-11-01)
Article
Open AccessWe 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
(Institute of Physics (IOP), 2018)
Conference report
Open AccessThis 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
(2007)
Conference report
Restricted access - publisher's policyThis 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
(1993-02)
Article
Open AccessThe 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 ... -
Regularization of vertical-cavity surface-emitting laser emission by periodic non-Hermitian potentials
(2019-08-15)
Article
Restricted access - publisher's policyWe propose a novel physical mechanism based on periodicnon-Hermitian potentials to efficiently control the complexspatial dynamics of broad-area lasers, particularly in vertical-cavity surface-emitting lasers (VCSELs), ... -
Rogue waves in injected semiconductor lasers with current modulation: role of the modulation phase
(2014-11-17)
Article
Restricted access - publisher's policySemiconductor 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
(2012-09-12)
Article
Open AccessWe 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
(Institute of Electrical and Electronics Engineers (IEEE), 2018)
Conference report
Restricted access - publisher's policyBroad 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 ...
