基于偏振特性的相移光栅磁场传感方法分析  

Analysis of Magnetic Field Sensor with Phase-Shifted Grating Based on the Polarization Properties

作　　者：冯奎[1] 朱勇[1] 苏洋[1] 彭晖[1] 

机构地区：[1]中国人民解放军理工大学通信工程学院,江苏南京210007

出　　处：《中国激光》2010年第3期763-768,共6页Chinese Journal of Lasers

基　　金：国家自然科学基金(60871075);中国博士后科学基金(20090451500)资助课题

摘　　要：应用传输矩阵法,对相移光栅的磁场传感机理进行了理论推导和仿真验证,分析了相移光栅的相移大小、相移位置以及光栅长度对磁场传感系统性能的影响。仿真结果表明,相移光栅阻带中透射窗口的带宽和透射率直接影响了磁场的测量结果,并与传统光纤布拉格光栅(FBG)测量方案进行了比较。仿真和实验表明,具有窄带宽高透射率透射窗口的相移光栅能够显著提高磁场传感系统的精度和灵敏度。The magnetic field measurement mechanism with phase-shifted grating is presented by using transfer matrix approach.The effects of grating parameters on the sensing performance are analyzed by simulations.It shows that the bandwidth and transmission rate of the stop-band transmission window in phase-shifted grating have great effects on the measurements.The results are compared with fiber Bragg grating（FBG） scheme.The simulations and experiments show that the phase-shifted grating with narrow bandwidth and high transmission rate can improve the accuracy and sensitivity of the magnetic sensor system.

关 键 词：传感器 相移光栅 偏振相关损耗 法拉第效应 透射窗口 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]