Michelson型循环自外差激光线宽测量法的理论分析  

Theoretical analysis of LC-RDSHI based on Michelson interferometer for laser linewidth measurement

作　　者：陈玖朋 刘涛[1,3] 董瑞芳[1,3] 高静[1,3] 焦东东[1,3] 白巍凯 张首刚[1,3] CHEN Jiu-peng LIU Zao DONG Rui-fang GAO Jing JIAO Dong-dong BAI Wei-kai ZHANG Shou-gang(National Time Service Center, Chinese Academy of Sciences, Xi＇an 710600, China University of Chinese Academy of Sciences, Beijing 100049, China Key Laboratory of Time and Frequency Primary Standards, National Time Service Center, Chinese Academy of Sciences, Xi＇an 710600, China)

机构地区：[1]中国科学院国家授时中心,西安710600 [2]中国科学院大学,北京100049 [3]中国科学院时间频率基准重点实验室,西安710600

出　　处：《时间频率学报》2017年第1期11-18,共8页Journal of Time and Frequency

基　　金：国家自然科学基金委重大科研仪器设备研制专项资助项目(61127901);国家自然科学基金资助项目(11273024;61025023);国家自然科学基金青年科学基金资助项目(11403031);中组部"青年拔尖人才支持计划"资助项目(组厅字〔2013〕33号);中国科学院科技创新"交叉与合作团队"资助项目(中科院人教字〔2012〕119号);中国科学院重点部署资助项目(KJZD-EW-W02)

摘　　要：提出一种基于Michelson型干涉仪结构的循环自外差激光线宽测量法,分析了其系统偏振态稳定性,并依据自外差法的数学模型,对其输出功率谱密度函数进行了推导。在此基础上,结合仿真结果讨论了系统参数变化对输出光谱线型的影响。结果表明,相较于M-Z型循环自外差激光线宽测量法,该方法的系统偏振态稳定性较高,输出的功率谱相对稳定,谱线的信噪比相对较高,使激光的线宽测量精度得以提高。This paper presents a new loss compensated recirculating delayed self-heterodyne detection （LC-RDSHD） method for laser linewidth measurement which is based on a Michelson interferometer. The stability of the system polarization state is analyzed, and the output power spectral density function is derived according to the mathematical model of self-heterodyne. In addition, the impact of the system parameter variations on the spectral line shape is discussed through software simulation. Compared with the LC-RDSHDwith a Mach-Zehnder interferometre, the new method enhances the stability and the signal to noise ratio, therefore the accuracy of measurement results is improved.

关 键 词：循环自外差法 线宽测量 功率谱 系统偏振态 

分 类 号：TN24[电子电信—物理电子学]