A scheme for generating multi-channel chaotic signals with time-delay signature suppression

2021 ◽  
Author(s):  
Liang Peng ◽  
Fei Wang ◽  
Guang-Qiong Xia ◽  
Zheng-Mao Wu
Keyword(s):  
Time Delay ◽  
Chaotic Signals

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 messages masked by chaotic signals of time-delay systems

1999 ◽  
Vol 60 (1) ◽  
pp. 320-323 ◽  
Author(s):  
Changsong Zhou ◽  
C.-H. Lai
Keyword(s):  
Time Delay ◽  
Delay Systems ◽  
Time Delay Systems ◽  
Chaotic Signals

Photonic Generation of Wideband Time-Delay-Signature-Eliminated Chaotic Signals Utilizing an Optically Injected Semiconductor Laser

2012 ◽  
Vol 48 (10) ◽  
pp. 1339-1345 ◽  
Author(s):  
Nianqiang Li ◽  
Wei Pan ◽  
Shuiying Xiang ◽  
Lianshan Yan ◽  
Bin Luo ◽  
...  
Keyword(s):  
Time Delay ◽  
Semiconductor Laser ◽  
Chaotic Signals ◽  
Photonic Generation

scholarly journals Suppression of Time Delay Signature in Chaotic Semiconductor Lasers with Filtered Optical Feedback

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Yuan Wu ◽  
Bingjie Wang ◽  
Jianzhong Zhang ◽  
Anbang Wang ◽  
Yuncai Wang
Keyword(s):  
Time Delay ◽  
Semiconductor Lasers ◽  
Optical Feedback ◽  
Laser System ◽  
External Cavity ◽  
Spectral Width ◽  
Laser Frequency ◽  
High Quality ◽  
Chaotic Signals ◽  
Fabry Perot

We report the investigation of the time delay signature in chaotic semiconductor subject to delayed filtered optical feedback, of which a Fabry-Pérot interferometer type of filter is placed in the external cavity. The numerical results show that the suppression of time delay is dependent on the spectral width of the filter and its detuning from the solitary laser frequency. Such laser system will be helpful to acquire high quality chaotic signals.

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