中国激光, 2018, 45 (5): 0501003, 网络出版: 2018-05-21
马赫-曾德尔干涉仪对抑制延时特征的作用机理研究 下载: 718次
Study on the Mechanism of Mach-Zehnder Interferometer for Suppressing the Delay Time Signature
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 laser optics chaos semiconductor lasers Mach-Zehnder interferometer delay time signature peak
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。
Abstract
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 with τd, while generating the new delay time signature peaks.
吴天安, 张晓旭, 张胜海, 兰淑静. 马赫-曾德尔干涉仪对抑制延时特征的作用机理研究[J]. 中国激光, 2018, 45(5): 0501003. Wu Tianan, Zhang Xiaoxu, Zhang Shenghai, Lan Shujing. Study on the Mechanism of Mach-Zehnder Interferometer for Suppressing the Delay Time Signature[J]. Chinese Journal of Lasers, 2018, 45(5): 0501003.