光学与光电技术, 2014, 12 (1): 19, 网络出版: 2014-05-04
基于光纤反射腔的高灵敏电流传感器方案
A Scenario of High Sensitivity Current Sensor Based on Optical Fiber Reflection Cavity
电流传感器 法拉第效应 Y分支光波导 法拉第旋镜 光纤传感 current sensor faraday effect Y-branch optical waveguide faraday rotation mirror optical fiber sense
摘要
提出了一种基于平面Y分支波导与法拉第旋镜的高灵敏度光纤电流传感器结构方案。利用两个法拉第旋镜与平面Y分支波导构成一个光纤反射腔,通过光在腔中的多次反射来增加待测电流导致的传感光纤中的法拉第相移,从而实现对微弱电流的测量。该结构方案中首次采用了平面Y分支光波导,从而可降低光路系统损耗,增加灵敏度,为微弱电流测量的工程化提供了一种可行的方法。
Abstract
In this paper, a configuration scenario of high sensitivity optical fiber current sensor based upon planar Y-branch optical waveguide and Faraday rotation mirror is proposed. An optical fiber reflection cavity is formed by utilizing a planar Y-branch optical waveguide and two Faraday rotation mirrors so that the optical signals which travel along the fiber sensing coil can experience multiple reflections. As a result, the Faraday phase shift which is induced in the fiber sensing coil by the current is increased. Therefore, a measurement for weak current can be realized. A planar Y-branch optical waveguide are used firstly in this configuration, which can decrease the optical losses and increase sensitivity of the system, and at last, provides a feasible measuring method for the weak current.
陈硕, 刘占元, 刘鹏飞, 陈开鑫. 基于光纤反射腔的高灵敏电流传感器方案[J]. 光学与光电技术, 2014, 12(1): 19. CHEN Shuo, LIU Zhan-yuan, LIU Peng-fei, CHEN Kai-xin. A Scenario of High Sensitivity Current Sensor Based on Optical Fiber Reflection Cavity[J]. OPTICS & OPTOELECTRONIC TECHNOLOGY, 2014, 12(1): 19.