Critical dispersion of chirped fiber Bragg grating for eliminating time delay signature of distributed feedback laser chaos
Da-Ming Wang(王大铭)1,†, Yi-Hang Lei(雷一航)1, Peng-Fei Shi(史鹏飞)1, and Zhuang-Ai Li(李壮爱)2
1 School of Information, Shanxi University of Finance and Economics, Shanxi 030006, China; 2 School of Humanities, Communication University of Shanxi, Jinzhong 030619, China
Abstract Optical chaos has attracted widespread attention owing to its complex dynamic behaviors. However, the time delay signature (TDS) caused by the external cavity mode reduces the complexity of optical chaos. We propose and numerically demonstrate the critical dispersion of chirped fiber Bragg grating (CFBG) for eliminating the TDS of laser chaos in this work. The critical dispersion, as a function of relaxation frequency and bandwidth of the optical spectrum, is found through extensive dynamics simulations. It is shown that the TDS can be eliminated when the dispersion of CFBG is above this critical dispersion. In addition, the influence of dispersive feedback light and output light from a laser is investigated. These results provide important quantitative guidance for designing chaotic semiconductor lasers without TDS.
Fund: Project supported by the National Natural Science Foundation of China (Grant No. 62105190), the Natural Science Foundation of Shanxi Province of China (Grant No. 20210302124268), the Scientific and Technological Innovation Programs of Higher Education Institutions of Shanxi Province of China (Grant No. 2021L285), and the Youth Research Foundation Project of Shanxi University of Finance and Economics (Grant No. QN-202015).
Corresponding Authors:
Da-Ming Wang
E-mail: wangdaming033@163.com
Cite this article:
Da-Ming Wang(王大铭), Yi-Hang Lei(雷一航), Peng-Fei Shi(史鹏飞), and Zhuang-Ai Li(李壮爱) Critical dispersion of chirped fiber Bragg grating for eliminating time delay signature of distributed feedback laser chaos 2023 Chin. Phys. B 32 090505
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