Permutation entropy analysis of chaotic semiconductor laser with chirped FBG feedback

被引：9
|
作者：
Chao, Meng [1 ,2 ]
Wang, Daming [1 ,2 ]
Wang, Longsheng [1 ,2 ]
Sun, Yuchuan [1 ,2 ]
Han, Hong [1 ,2 ]
Guo, Yuanyuan [1 ,2 ]
Jia, Zhiwei [1 ,2 ]
Wang, Yuncai [1 ,2 ,3 ]
Wang, Anbang [1 ,2 ]
机构：
[1] Taiyuan Univ Technol, Key Lab Adv Transducers & Intelligent Control Sys, Minist Educ, Taiyuan 030024, Shanxi, Peoples R China
[2] Taiyuan Univ Technol, Coll Phys & Optoelect, Inst Optoelect Engn, Taiyuan 030024, Shanxi, Peoples R China
[3] Guangdong Univ Technol, Inst Adv Photon Technol, Guangzhou 510006, Guangdong, Peoples R China
来源：
OPTICS COMMUNICATIONS | 2020年 / 456卷
基金：
中国国家自然科学基金;
关键词：
Chaos; Chirped fiber Bragg grating; Complexity; Permutation entropy; Semiconductor laser; Time delay signature; TIME-DELAY SIGNATURE; OPTICAL FEEDBACK; SYNCHRONIZATION; CONCEALMENT; OUTPUT; COMMUNICATION; COMPLEXITY;
D O I：
10.1016/j.optcom.2019.124702
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We numerically analyze the chaos complexity of a semiconductor laser with chirped fiber Bragg grating (CFBG) feedback by utilizing the permutation entropy (PE). Due to dispersion-induced nonlinearity of chirped grating, the time delay signature (TDS) can be suppressed or erased and the complexity enhancement is expected. The effects of laser parameters on PE as well as the TDS are studied in detail. The results show that for CFBG feedback, the TDS can be suppressed in the range of parameters where linewidth enhancement factor exceeds 3 and gain saturation coefficient is lower than 4x10(-4) mu m(3), and the complexity of chaotic signals is enhanced. As the feedback strength and bias current increase, the PE value under CFBG feedback increases linearly to a maximum of 0.994 and remains stable. Compared with mirror feedback, CFBG feedback can achieve increased complexity over a wider range of parameters. In addition, when the dispersion value of the chirped grating exceeds 2000 ps/nm, the frequency detuning range of -15 GHz to 10 GHz is beneficial to obtain chaotic signals with higher PE values.
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页数：5
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