基于布里渊动态光栅的保偏光纤中温度和应变的传感机制研究  

Temperature and Strain Sensing Mechanism in Polarization Maintaining Fiber Based on Brillouin Dynamic Grating

作　　者：徐志钮[1] 赵丽娟[1] 陈飞飞 车小霞 郭文翰 王贺晴 XU Zhi-niu;ZHAO Li-juan;CHEN Fei-fei;CHE Xiao-xia;GUO Wen-han;WANG He-qing(School of Electrical and Electronic Engineering,North China Electric Power University,Baoding,Hebei 071003,China)

机构地区：[1]华北电力大学电气与电子工程学院

出　　处：《光子学报》2019年第8期54-62,共9页Acta Photonica Sinica

基　　金：国家自然科学基金(Nos.51607066,61377088);中央高校基本科研业务费专项资金项目(Nos.2019MS090,2019MS085);河北省自然科学基金(No.E2019502177)~~

摘　　要：对保偏光纤中基于布里渊动态光栅的温度和应变的传感机制进行了探索.从保偏光纤两正交偏振轴的传输特性出发,分别研究了布里渊动态光栅的波长、波长差以及拍长与温度和应变的关系.研究结果表明,波长的对数与光纤温度近似成线性关系,波长的相对变化量与光纤应变成线性关系;两轴波长差、拍长的倒数与温度和应变近似成线性关系.本文研究结果为基于布里渊动态光栅的保偏光纤分布式温度和应变的传感指明了潜在的研究方向.The temperature and strain sensing mechanisms based on Brillouin dynamic grating in polarization-maintaining fiber are explored.Based on the transmission characteristics of two orthogonal polarization axes of polarization-maintaining fibers,the relationships between the wavelength,the wavelength difference,the beat length of Brillouin dynamic grating,and temperature and strain in fiber are investigated.The results reveal that the logarithm of the wavelength is nearly linear with the fiber temperature,and the relative change in the wavelength are linear with the strain in the fiber.The difference in wavelength between two-axes and the reciprocal of the beat length is approximately linear with the temperature and strain.This paper points out potential research directions for the polarization-maintaining fiber distributed temperature and strain sensing based on Brillouin dynamic grating.

关 键 词：保偏光纤 温度和应变 传感机制 波长 波长差 拍长 

分 类 号：TP212.14[自动化与计算机技术—检测技术与自动化装置]