scholarly journals Routes to Chaos of a Semiconductor Laser Subjected to External Optical Feedback: A Review

Photonics ◽  
2020 ◽  
Vol 7 (1) ◽  
pp. 22 ◽  
Author(s):  
Alexandre Locquet
Keyword(s):  
Semiconductor Laser ◽  
Cavity Mode ◽  
Continuous Wave ◽  
Optical Feedback ◽  
External Cavity ◽  
Experimental Investigations ◽  
Optical Frequency ◽  
Cavity Modes ◽  
Feedback Strength ◽  
Feedback Level

This paper reviews experimental investigations of the route to chaos of a semiconductor laser subjected to optical feedback from a distant reflector. When the laser is biased close to threshold, as the feedback strength is increased, an alternation between stable continuous wave (CW) behavior and irregular, chaotic fluctuations, involving numerous external-cavity modes, is observed. CW operation occurs on an external-cavity mode whose optical frequency is significantly lower than that of the solitary laser. The scenario is significantly different for larger currents as the feedback level is increased. At low feedback, the laser displays periodic or quasiperiodic behavior, mostly around external-cavity modes whose frequency is slightly larger than that of the solitary laser. As the feedback level increases, the RF and optical frequencies involved progressively lock until complete locking is achieved in a mixed external-cavity mode state. In this regime, the optical intensity and voltage oscillate at a frequency that is also equal to the optical frequency spacing between the modes participating in the dynamics. For even higher feedback, the locking cannot be maintained and the laser displays fully developed coherence collapse.

scholarly journals THE ECM-BACKBONE OF THE LANG–KOBAYASHI EQUATIONS: A GEOMETRIC PICTURE

2007 ◽  
Vol 17 (05) ◽  
pp. 1575-1588 ◽  
Author(s):  
VIVI ROTTSCHÄFER ◽  
BERND KRAUSKOPF
Keyword(s):  
Analytical Study ◽  
Optical Feedback ◽  
Three Dimensional ◽  
External Cavity ◽  
Pump Current ◽  
Dimensional Parameter ◽  
Cavity Modes ◽  
Feedback Strength ◽  
Geometric Picture ◽  
Feedback Phase

We perform an analytical study of the external cavity modes of a semiconductor laser subject to conventional optical feedback as modeled by the well-known Lang–Kobayashi equations. Specifically, the bifurcation set is derived in the three-dimensional parameter space of feedback phase, feedback strength and pump current of the laser. Different open regions in this space correspond to different numbers of physically relevant external cavity modes of the laser. Some of their stability properties are determined from the characteristic equation.

scholarly journals Inducing tunable single-mode operation of Fabry-Perot semiconductor laser coupled with very-short cavity with selective optical feedback

2019 ◽  
Vol 15 (1) ◽  
Author(s):  
Mohammed S. Al-Ghamdi ◽  
Ahmed Bakry ◽  
Moustafa Ahmed
Keyword(s):  
Semiconductor Laser ◽  
Continuous Wave ◽  
Optical Feedback ◽  
External Cavity ◽  
Single Mode ◽  
Modal Gain ◽  
Central Wavelength ◽  
Single Mode Operation ◽  
Mode Operation ◽  
Mode Oscillation

Abstract We report on achieving tuned single mode operation of a multimode semiconductor laser by coupling it to a very-short external cavity with selective feedback. We show that the induced uniform feedback light from the very-short external cavity can induce single-mode oscillation over a broad range of optical feedback. Then by applying selective external to the optimum settings of the single-mode oscillation, we predict tuning of the single-mode output over a wavelength range of ~ 20 nm by detuning the peak wavelength of optical feedback from the central wavelength of the modal gain. The study is based on modeling of the dynamics of multimode semiconductor laser subject to selective optical feedback. The model takes into account mechanisms of both self- and cross-modal gain suppression, and the study is concerned with the very-short external cavity that corresponds to stable continuous-wave (CW) operation.

Stability Analysis for External Cavity Modes of Semiconductor Laser Subject to Optical Feedback

2009 ◽  
Vol 36 (6) ◽  
pp. 1360-1365
Author(s):  
王少卿 Wang Shaoqing ◽  
王向朝 Wang Xiangzhao ◽  
步扬 Bu Yang
Keyword(s):  
Stability Analysis ◽  
Semiconductor Laser ◽  
Optical Feedback ◽  
External Cavity ◽  
Cavity Modes

Linewidth Stabilization of Semiconductor Lasers in an External Cavity

1984 ◽  
Vol 5 (2) ◽  
Author(s):  
C. J. Nielsen ◽  
J. H. Osmundsen
Keyword(s):  
Semiconductor Laser ◽  
Semiconductor Lasers ◽  
Cavity Mode ◽  
External Cavity ◽  
Frequency Stabilization ◽  
Control Loop ◽  
Mean Frequency ◽  
Mode Operation ◽  
Single Cavity ◽  
Single Cavity Mode

SummaryAn automatic linewidth control loop which provides stable optimum linewidth reduction and single cavity mode operation of an external cavity semiconductor laser is presented. Stable linewidth reduction from 70 MHz to below 2 MHz is obtained for a 1.3 μm BH-laser, whereas simultaneous mean frequency stabilization to within 1 kHz and linewidth reduction from 17 MHz to 1.6 MHz is demonstrated for an 830 nm CSP-laser.

The Role of Master Laser with Feedback in Time-Delay Signature Suppression of Semiconductor Laser Subject to Chaotic Optical Injection

2017 ◽  
Vol 27 (11) ◽  
pp. 1750169 ◽  
Author(s):  
Liyue Zhang ◽  
Wei Pan ◽  
Penghua Mu ◽  
Xiaofeng Li ◽  
Shuiying Xiang ◽  
...  
Keyword(s):  
Time Delay ◽  
Semiconductor Laser ◽  
Optical Feedback ◽  
Bias Current ◽  
Optical Injection ◽  
Strength Parameter ◽  
Master Laser ◽  
Feedback Strength ◽  
Chaotic Signals

The important role of parameters in master laser with optical feedback for the elimination of time-delay (TD) signature in semiconductor laser subject to chaotic optical injection is investigated systemically. The experimental results show that TD signature suppressed chaotic signals can be credibly generated by increasing the feedback strength of the master laser, which is quite different from the trends observed in semiconductor laser (SL) with optical feedback. Systematically numerical analysis is also carried out as a validation, and it is shown that with low bias current and strong feedback strength, parameter regions contributing to successful TD suppression are much wider. Furthermore, it is shown that the influence of frequency detuning in TD concealment will change with the increase of feedback strength. All the numerical results are in perfect accordance with experimental observation.

scholarly journals Extracting the external-cavity key of a chaotic semiconductor laser with double optical feedback by spectrum analyzer

2012 ◽  
Vol 61 (3) ◽  
pp. 034211
Author(s):  
Liang Jun-Sheng ◽  
Wu Yuan ◽  
Wang An-Bang ◽  
Wang Yun-Cai
Keyword(s):  
Semiconductor Laser ◽  
Optical Feedback ◽  
External Cavity ◽  
Spectrum Analyzer
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