Time delay signature concealment of chaotic semiconductor laser subject to nonlinear feedback  

作　　者：薛琛鹏 江宁 吕韵欣 邱昆 

机构地区：[1]Key Laboratory of Optical Fiber Sensing and Communications, Ministry of Education,University of Electronic Science and Technology of China

出　　处：《Chinese Optics Letters》2016年第9期53-57,共5页中国光学快报（英文版）

基　　金：supported in part by the National Science Foundation of China(NSFC)(Nos.61301156and 61471087);the Specialized Research Fund for the Doctoral Program of Higher Education of China(No.20130185120007);the Fundamental Research Funds for the Central Universities(No.ZYGX2013J001)

摘　　要：An external-cavity semiconductor laser with nonlinear optical feedback to generate broadband chaos with time delay signature（TDS） suppression is investigated. The system is composed of three semiconductor lasers, one of which is regarded as the chaos generator, while the other two play a role of a built-in nonlinear modulator in the external cavity of the generator. The results show that by properly setting the feedback strength and time delay of the first semiconductor laser in the nonlinear modulator, the TDS embedded in the intensity and phase time-series of the chaos can be effectively concealed in a wide range of frequency detuning.An external-cavity semiconductor laser with nonlinear optical feedback to generate broadband chaos with time delay signature（TDS） suppression is investigated. The system is composed of three semiconductor lasers, one of which is regarded as the chaos generator, while the other two play a role of a built-in nonlinear modulator in the external cavity of the generator. The results show that by properly setting the feedback strength and time delay of the first semiconductor laser in the nonlinear modulator, the TDS embedded in the intensity and phase time-series of the chaos can be effectively concealed in a wide range of frequency detuning.

关 键 词：Nonlinear optics Semiconductor lasers Time delay 

分 类 号：TN248.4[电子电信—物理电子学] TP273[自动化与计算机技术—检测技术与自动化装置]