Complexity and bandwidth enhancement in unidirectionally coupled semiconductor lasers with time-delayed optical feedback

2016 ◽  
Vol 93 (3) ◽  
Author(s):  
Kazutaka Kanno ◽  
Atsushi Uchida ◽  
Masatoshi Bunsen
Keyword(s):  
Semiconductor Lasers ◽  
Optical Feedback ◽  
Bandwidth Enhancement ◽  
Delayed Optical Feedback ◽  
Coupled Semiconductor

Quantifying stochasticity in the dynamics of delay-coupled semiconductor lasers via forbidden patterns

2010 ◽  
Vol 368 (1911) ◽  
pp. 367-377 ◽  
Author(s):  
Jordi Tiana-Alsina ◽  
Javier M. Buldú ◽  
M. C. Torrent ◽  
Jordi García-Ojalvo
Keyword(s):  
Time Series ◽  
Semiconductor Lasers ◽  
Optical Feedback ◽  
Low Frequency ◽  
Lag Time ◽  
Lasing Threshold ◽  
Switching Dynamics ◽  
Forbidden Patterns ◽  
Coherence Collapse ◽  
Coupled Semiconductor

We quantify the level of stochasticity in the dynamics of two mutually coupled semiconductor lasers. Specifically, we concentrate on a regime in which the lasers synchronize their dynamics with a non-zero lag time, and the leader and laggard roles alternate irregularly between the lasers. We analyse this switching dynamics in terms of the number of forbidden patterns of the alternate time series. The results reveal that the system operates in a stochastic regime, with the level of stochasticity decreasing as the lasers are pumped further away from their lasing threshold. This behaviour is similar to that exhibited by a single semiconductor laser subject to external optical feedback, as its dynamics shifts from the regime of low-frequency fluctuations to coherence collapse.

scholarly journals Nonlinear Dynamics of a Single-Mode Semiconductor Laser with Long Delayed Optical Feedback: A Modern Experimental Characterization Approach

Photonics ◽  
2022 ◽  
Vol 9 (1) ◽  
pp. 47
Author(s):  
Xavier Porte ◽  
Daniel Brunner ◽  
Ingo Fischer ◽  
Miguel C. Soriano
Keyword(s):  
Semiconductor Laser ◽  
Semiconductor Lasers ◽  
Optical Feedback ◽  
Dynamical Behavior ◽  
Laser Cavity ◽  
Single Mode ◽  
Point Of View ◽  
Multiple Time Scales ◽  
Multiple Time ◽  
Delayed Optical Feedback

Semiconductor lasers can exhibit complex dynamical behavior in the presence of external perturbations. Delayed optical feedback, re-injecting part of the emitted light back into the laser cavity, in particular, can destabilize the laser’s emission. We focus on the emission properties of a semiconductor laser subject to such optical feedback, where the delay of the light re-injection is large compared to the relaxation oscillations period. We present an overview of the main dynamical features that emerge in semiconductor lasers subject to delayed optical feedback, emphasizing how to experimentally characterize these features using intensity and high-resolution optical spectra measurements. The characterization of the system requires the experimentalist to be able to simultaneously measure multiple time scales that can be up to six orders of magnitude apart, from the picosecond to the microsecond range. We highlight some experimental observations that are particularly interesting from the fundamental point of view and, moreover, provide opportunities for future photonic applications.

scholarly journals Task-Independent Computational Abilities of Semiconductor Lasers with Delayed Optical Feedback for Reservoir Computing

Photonics ◽  
2019 ◽  
Vol 6 (4) ◽  
pp. 124 ◽  
Author(s):  
Krishan Harkhoe ◽  
Guy Van der Sande
Keyword(s):  
Semiconductor Laser ◽  
Semiconductor Lasers ◽  
Optical Feedback ◽  
Time Series Prediction ◽  
Reservoir Computing ◽  
Computational Capacity ◽  
Optimal Node ◽  
Chaotic Time Series Prediction ◽  
Sample Time ◽  
Delayed Optical Feedback

Reservoir computing has rekindled neuromorphic computing in photonics. One of the simplest technological implementations of reservoir computing consists of a semiconductor laser with delayed optical feedback. In this delay-based scheme, virtual nodes are distributed in time with a certain node distance and form a time-multiplexed network. The information processing performance of a semiconductor laser-based reservoir computing (RC) system is usually analysed by way of testing the laser-based reservoir computer on specific benchmark tasks. In this work, we will illustrate the optimal performance of the system on a chaotic time-series prediction benchmark. However, the goal is to analyse the reservoir’s performance in a task-independent way. This is done by calculating the computational capacity, a measure for the total number of independent calculations that the system can handle. We focus on the dependence of the computational capacity on the specifics of the masking procedure. We find that the computational capacity depends strongly on the virtual node distance with an optimal node spacing of 30 ps. In addition, we show that the computational capacity can be further increased by allowing for a well chosen mismatch between delay and input data sample time.

scholarly journals Excitable pulses and diffusion of localized states in a driven semiconductor laser with delay

2018 ◽  
pp. 96-101 ◽  
Author(s):  
Bruno Garbin ◽  
Giovanna Tissoni ◽  
Stephane Barland
Keyword(s):  
Semiconductor Laser ◽  
Semiconductor Lasers ◽  
Optical Feedback ◽  
Optical Injection ◽  
Localized States ◽  
External Perturbations ◽  
Parameter Values ◽  
And Diffusion ◽  
Delayed Optical Feedback

Semiconductor lasers with optical injection may be brought to an “excitable” regime, in which they respond to external perturbations in a neuron-like way. When submitted to delayed optical feedback this system can host stable optical localized states. We characterize experimentally the excitable response of a semiconductor laser with optical injection to external perturbations for different parameter values and show that localized states may diffuse in presence of noise.

scholarly journals Fast photonic information processing using semiconductor lasers with delayed optical feedback: Role of phase dynamics

2014 ◽  
Vol 22 (7) ◽  
pp. 8672 ◽  
Author(s):  
Romain Modeste Nguimdo ◽  
Guy Verschaffelt ◽  
Jan Danckaert ◽  
Guy Van der Sande
Keyword(s):  
Information Processing ◽  
Semiconductor Lasers ◽  
Optical Feedback ◽  
Phase Dynamics ◽  
Delayed Optical Feedback

Spatio-Temporal Dynamics in Semiconductor Lasers with Delayed Optical Feedback

1998 ◽  
Vol 08 (05) ◽  
pp. 951-963 ◽  
Author(s):  
Markus Münkel ◽  
Friedemann Kaiser ◽  
Ortwin Hess
Keyword(s):  
Semiconductor Lasers ◽  
Continuous Wave ◽  
Temporal Dynamics ◽  
Optical Feedback ◽  
Cavity Modes ◽  
Eigenmode Analysis ◽  
Mode Hopping ◽  
Spatio Temporal ◽  
Stripe Laser ◽  
Delayed Optical Feedback

We investigate the influence of delayed optical feedback (DOF) on the dynamics of semiconductor lasers. In the case of the narrow single-stripe laser, we find that the presence of DOF leads to a wealth of dynamical phenomena in the coherence-collapsed regime, including mode-hopping between compound-cavity modes induced by DOF. Focusing on the twin-stripe laser — the most simple system with inherent spatio-temporal instabilities — we show that feedback may both induce and suppress spatio-temporal instabilities. Eigenmode analysis enables us to determine and identify the underlying spatio-temporal "supermodes". For appropriately chosen parameters, regular regimes including continuous wave operation can be obtained from an originally chaotic regime. For moderate to strong feedback, interaction between the spatial degrees of freedom in the twin-stripe laser and the compound cavity modes leads to a new phenomenon which we term "spatio-temporal mode-hopping".

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