基于光学外差的光纤环形激光器跳模检测实验研究

检测光纤环形激光器输出模式的动态特性是实验与工程应用的难题之一。在不同抽运强度以及长时间运转条件下,激光器会输出复杂的模式动态现象。受限于实验手段，目前的实时测量系统局限于仅获取激光器的输出强度信息而无法准确获取更多的模式动态特性。基于这一点，报道了采用光学外差的测量方法，搭建相应的实验装置测得待测光纤环形激光器与参考光源的拍频信号。实验中可实时获取包括跳模以及频率漂移在内的模式动态时频瀑布图，并提取各模式强度的时间序列，进而能够检测光纤环形激光器输出模式动态特性以及分析模式光强，为控制光纤环形激光器输出以及探究其内在频率动力学特性提供重要的测量手段。

Abstract

Detection for mode dynamics of fiber ring laser is a key problem for experiments and applications. On the condition of the different pumping intensity and long-time operation laser can appear complex mode dynamic phenomenon. Output of the intensity can be obtained easily based on the current experimental condition, but more exact mode dynamic characteristic is still difficult to be obtained. One type of mode hopping detection for fiber ring laser based on optic heterodyne is set up. Real-time mode hopping and frequency drift of fiber ring laser is detected. Time-frequency fall graph of mode characteristic and the mode intensity time series can be acquired. According to the experimental results, the output of fiber ring laser mode dynamics is detected and analysis for mode intensity can be obtained. This method plays an imperative role in laser control systems and frequency dynamics analysis.

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唐凯, 王俊杰, 马明祥, 徐攀, 胡正良. 基于光学外差的光纤环形激光器跳模检测实验研究[J]. 中国激光, 2015, 42(s1): s102003. Tang Kai, Wang Junjie, Ma Mingxiang, Xu Pan, Hu Zhengliang. Experimental Study on Mode Hopping Detection of Fiber Ring Laser Based on Heterodyne Detection[J]. Chinese Journal of Lasers, 2015, 42(s1): s102003.

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