单端反馈互耦合垂直腔面发射激光器混沌输出的时延特征和带宽分析  

Time-Delay Characteristic and Bandwidth Analysis of Chaotic Output from Single-Ended Feedback and Mutually Coupled Vertical-Cavity Surface-Emitting Lasers

作　　者：张晓旭[1] 吴天安[1] 常凯歌 张胜海[1] 

机构地区：[1]中国人民解放军信息工程大学理学院,河南郑州450001

出　　处：《中国激光》2017年第5期61-67,共7页Chinese Journal of Lasers

基　　金：河南省重点科技攻关项目(152102210012)

摘　　要：针对无反馈互耦合垂直腔面发射激光器(VCSELs)系统的混沌输出不能同时实现时延特征隐藏和带宽展宽的问题,通过对无反馈互耦合VCSELs系统中的一个激光器增加外反馈,数值分析了单端反馈互耦合VCSELs混沌输出的时延特征和带宽。结果表明,反馈强度、频率失谐和互耦合强度影响单端反馈互耦合VCSELs混沌输出的时延特征和带宽。有反馈端激光器不能同时实现时延特征隐藏和带宽展宽,无反馈端激光器可以在合适的互耦合强度和频率失谐参数区间内同时实现时延特征隐藏和带宽展宽。改变反馈强度不影响无反馈端激光器实现时延特征隐藏质量和带宽,但会影响无反馈端激光器同时实现时延特征隐藏和带宽展宽的频率失谐区域位置,且增大反馈强度时频率失谐区域位置整体向负失谐区域移动。The time-delay characteristic concealment and the bandwidth expanding of the chaotic output of mutually coupled vertical-cavity surface-emitting lasers （VCSELs） without feedback can′t be achieved simultaneously, so an external optical feedback is added to one of the lasers of mutually coupled VCSELs without feedback. The time-delay characteristic and the bandwidth of the chaotic output from the single-ended feedback and mutually coupled VCSELs are numerically studied. Results show that feedback intensity, frequency detuning and mutually coupled intensity have effects on the time-delay characteristic and the bandwidth of the single-ended feedback and mutually coupled VCSELs. The laser with feedback can′t obtain the time-delay characteristic concealment and the bandwidth expanding simultaneously, but the laser without feedback can obtain the time-delay characteristic concealment and the bandwidth expanding simultaneously in the proper mutually coupled intensity and frequency detuning. Changing the feedback intensity does not effect the quality of the time-delay characteristic concealment and the width of the bandwidth, but can effect the position of the frequency detuning when the time-delay characteristic concealment and the bandwidth expanding are achieved simultaneously. The position of the frequency detuning region moves to the negative frequency detuning region when the feedback intensity increases.

关 键 词：激光器 垂直腔面发射激光器 时延特征 带宽 

分 类 号：O437[机械工程—光学工程]