半导体环形激光器混沌输出的时延特征抑制  

Chaotic Time-delay Signature Suppression in Semiconductor Ring Laser

作　　者：蒋再富[1] 张定梅[1] 邓严林 Jiang Zaifu;Zhang Dingmei;Deng Yanlin(School of Mathematics and Physics,Jingchu University of Technology,Jingmeru Hubei 448000,China)

机构地区：[1]荆楚理工学院数理学院,湖北荆门448000

出　　处：《应用激光》2021年第5期1077-1083,共7页Applied Laser

基　　金：2020年度湖北省教育厅科学研究计划指导性项目(B2020194,B2020197);应用数学湖北省重点实验室(湖北大学)开放基金资助项目(HBAM202001)。

摘　　要：为有效抑制混沌信号的时延特征(TDS),提出一种基于半导体环形激光器(SRL)滤波光反馈的结构。利用四阶龙格-库塔方法对模型进行了数值仿真,并用自相关函数和延迟互信息对SRL输出混沌信号的TDS进行了量化。研究表明,与普通光反馈结构相比,滤波光反馈能有效消除由于外腔反馈延迟时间引起的TDS。通过计算自相关和互信息峰值在滤波频率失谐和滤波带宽构成的参数空间中的分布,发现在正频率失谐区域TDS抑制效果最好。In order to suppress the time-delay signature(TDS) of the chaotic signals, a novel filtered optical feedback structure based on a semiconductor ring laser(SRL) is proposed. The fourth-order Runge-Kutta algorithm is used for simulating and the TDS of the chaotic signal output from a SRL is quantified by autocorrelation function and delay mutual information. The results show that, compared with the conventional optical feedback structure, the filtered optical feedback can effectively eliminate the TDS caused by the external cavity feedback delay time. Moreover, through calculating the distribution of autocorrelation and mutual information peaks in the parameter space of filter frequency detuning and filter bandwidth, it is found that TDS has been best concealed in the positive frequency detuning region.

关 键 词：非线性光学 半导体环形激光器 滤波光反馈 混沌 时延特征 

分 类 号：O437.1[机械工程—光学工程]