Critical dispersion of chirped fiber Bragg grating for eliminating time delay signature of distributed feedback laser chaos  

作　　者：王大铭 雷一航 史鹏飞 李壮爱 Da-Ming Wang;Yi-Hang Lei;Peng-Fei Shi;Zhuang-Ai Li(School of Information,Shanxi University of Finance and Economics,Shanxi 030006,China;School of Humanities,Communication University of Shanxi,Jinzhong 030619,China)

机构地区：[1]School of Information,Shanxi University of Finance and Economics,Shanxi 030006,China [2]School of Humanities,Communication University of Shanxi,Jinzhong 030619,China

出　　处：《Chinese Physics B》2023年第9期237-241,共5页中国物理B（英文版）

基　　金：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);the Youth Researchof Shanxi University of Finance and Economics(Grant No.QN-202015)。

摘　　要：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.

关 键 词：CHAOS semiconductor laser time delay signature chirped fiber Bragg grating(CFBG) 

分 类 号：TN248[电子电信—物理电子学]