马赫-曾德尔干涉仪对抑制延时特征的作用机理研究  

Study on the Mechanism of Mach-Zehnder Interferometer for Suppressing the Delay Time Signature

作　　者：吴天安[1] 张晓旭[1] 张胜海[1] 兰淑静 Wu Tianan;Zhang Xiaoxu;Zhang Shenghai;Lan Shujing(College of Science, PLA Information Engineering University, Zhengzhou, Henan 450001, China)

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》2018年第5期12-21,共10页Chinese Journal of Lasers

基　　金：河南省重点科技攻关项目(152102210012)

摘　　要：双光反馈和双光注入作为抑制光反馈混沌激光器延时特征峰的两种重要方案,本质上都是通过马赫-曾德尔干涉仪对延时特征峰进行抑制。总结了两种方案中干涉仪对延时特征峰的抑制规律,系统分析了干涉仪在抑制延时特性中的作用与机理。当干涉仪的两臂接近相等时,两路混沌激光的电场强度和相位具有较强的相关性,光的叠加以相干叠加为主,混沌激光的延时特征峰随τd(由于干涉仪两臂存在光程差产生的时间延迟)呈周期性变化;当干涉仪的两臂臂长相差较大且不成比例时,两路混沌激光的电场强度和相位的相关性降低甚至消失,光的叠加为非相干叠加,但是对延时特征峰的抑制仍由干涉项决定,主延时特征峰不随τd变化,同时产生新的延时特征峰。Double optical feedback and double light injection are two important schemes to suppress the delay time signature peak of optical feedback chaotic lasers.In essence,the delay time signature peak is suppressed by the Mach-Zehnder interferometer.We summarize the suppression law for the delay time signature peak in the two schemes,and systematically analyze the function and mechanism of the interferometer in the suppression of the delay time signature peak.When the arms of the interferometer are close to each other,the electric field intensity and phase of the two chaotic lasers are strongly correlated.The superposition of light is dominated by coherent superposition,and the delay time signature peak of chaotic laser changes periodically with τd（delay time corresponding to the optical path difference in the interferometer）.When the arms of the interferometer are obviously unequal and out of proportion,the correlation between the electric field intensity and phase of the two chaotic lasers decreases or even disappears,the superposition of light is a non-coherent superposition,but the suppression of the delay time signature peak is mainly determined by the interference term,and the main delay time signature peak does not change withτd,while generating the new delay time signature peaks.

关 键 词：激光光学 混沌 半导体激光器 马赫-曾德尔干涉仪 延时特征峰 

分 类 号：O437[机械工程—光学工程]