激光与光电子学进展, 2020, 57 (5): 050601, 网络出版: 2020-03-05
基于法拉第旋光器的光纤干涉仪传感探头的设计与改进 下载: 1105次
Design and Improvement of Optical Fiber Interferometer Sensor Based on Faraday Rotator
光纤光学 干涉仪 偏振 琼斯矩阵 法拉第旋光器 可见度 fiber optics interferometer polarization Jones matrix Faraday rotator visibility
摘要
为解决光纤干涉仪输出条纹可见度受单模光纤双折射效应引起的偏振衰落影响,提出一种消除偏振衰落的简单方法,该方法可同时实现光纤干涉仪传感器的空间点探测。设计一种内置旋转角度为45°的法拉第旋光器的传感探头,将其与旋转角度为45°的法拉第旋转镜分别加在Michelson光纤干涉仪的两端。对干涉仪系统进行了理论计算分析,在外界环境变化和偏振控制器改变条件下进行干涉仪可见度测量实验。结果表明:该方法在对外界进行点探测的同时能够有效克服光纤干涉仪的偏振衰落,得到了变化小于0.9% 的干涉稳定度。
Abstract
The visibility of output stripes from a fiber interferometer is affected by the polarization fading caused by the birefringence effect of a single-mode fiber. To solve this problem, we propose a simple depolarization fading method. This method can also realize the space point detection of an optical fiber interferometer sensor. A sensor probe with a built-in Faraday rotator which is with a rotation angle of 45° is designed, and a Faraday rotating mirror with a rotation angle of 45° is used. They are added in the two ends of a Michelson fiber interferometer. In this paper, the interferometer system is theoretically calculated and analyzed, and the visibility measurement experiment of the interferometer is carried out when the external environment and the polarization controller are changed. The results show that this method can effectively overcome the polarization fading of the fiber interferometer when we conduct the point detection in the outside world, and it can obtain the interference stability with variation less than 0.9%.
井帅奇, 荣健, 田佳艳. 基于法拉第旋光器的光纤干涉仪传感探头的设计与改进[J]. 激光与光电子学进展, 2020, 57(5): 050601. Shuaiqi Jing, Jian Rong, Jiayan Tian. Design and Improvement of Optical Fiber Interferometer Sensor Based on Faraday Rotator[J]. Laser & Optoelectronics Progress, 2020, 57(5): 050601.