系统参数不敏感的循环延迟自外差激光线宽测量法

提出了一种激光线宽测量新方法—系统参数不敏感型循环损耗补偿循环延迟自外差法（LC-RDSHI）。通过对系统输出功率谱密度函数进行推导以及拍频功率谱仿真，分析讨论了该方法对系统参数不敏感的特性。在此基础上，搭建相应实验装置，观测了系统参数对LC-RDSHI输出功率谱的影响，发现实验观测结果与理论分析相吻合。此外，基于不同的实验系统参数，将本方法与传统的LC-RDSHI进行了线宽测量比较。结果表明，系统参数不敏感型LC-RDSHI具有更高的线宽测量精度，并且测试过程更加简单，从而具有更好的应用前景。

Abstract

This paper presents a new approach for laser linewidth measurement-loss compensated recirculating delayed self-heterodyne interferometer (LC-RDSHI), which is insensitive to the system parameters. Through the derivation of its system output power spectral density function and simulation of beat frequency power spectrum, the characteristics of system parameters insensitivity for proposed method are analyzed and discussed. On this basis, we build the appropriate experimental device and observe the effects of system parameters on the output power spectrum of LC-RDSHI, and we find that the experimental observations agree with theoretical analysis. Besides, based on different experiment system parameters, we make a comparison of linewidth measurements between the proposed method and conventional LC-RDSHI. The results indicate that the system parameters insensitive LC-RDSHI has higher linewidth measurement accuracy, its measurement process is easier, and therefore, it has better application prospects.

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陈玖朋, 高静, 焦东东, 白巍凯, 邓雪, 刘杰, 许冠军, 董瑞芳, 刘涛, 张首刚. 系统参数不敏感的循环延迟自外差激光线宽测量法[J]. 光学学报, 2016, 36(11): 1114001. Chen Jiupeng, Gao Jing, Jiao Dongdong, Bai Weikai, Deng Xue, Liu Jie, Xu Guanjun, Dong Ruifang, Liu Tao, Zhang Shougang. Laser Linewidth Measurement Based on System Parameters Insensitive Recirculating Delayed Self-Heterodyne Interferometer[J]. Acta Optica Sinica, 2016, 36(11): 1114001.

系统参数不敏感的循环延迟自外差激光线宽测量法

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