同时测量温度和曲率的光纤传感器  

Simultaneous Measurement of Curvature and Temperature Based on Optical Fiber Sensor

作　　者：王栋远 孙明明[1] 金永兴[1] 王剑锋[1] 董新永[1] 

机构地区：[1]中国计量学院光学与电子科技学院,杭州310018

出　　处：《光子学报》2015年第11期20-24,共5页Acta Photonica Sinica

基　　金：国家重点基础研究发展计划(No.2010CB327804);浙江省公益项目(No.2014C33065);浙江省安全生产科技计划(No.2014A1004)资助~~

摘　　要：提出了一种基于光纤布拉格光栅和马赫-曾德干涉仪相结合的同时测量曲率和温度的光纤传感器.该光纤传感器在马赫-曾德干涉仪中熔接一段布拉格光纤光栅,其中马赫-曾德干涉仪由两个花生形结构单模光纤熔接而成.实验结果表明,马赫-曾德干涉仪的透射谱中干涉峰和光纤布拉格光栅透射谱中谐振峰对曲率和温度有不同的响应灵敏度,因此可以利用矩阵实现对曲率和温度的同时测量.实验中测得马赫-曾德干涉仪曲率灵敏度为-27.58nm/m-1,光纤布拉格光栅在一定的测量范围内对曲率的变化不敏感,马赫-曾德干涉仪和光纤布拉格光栅的温度灵敏度分别为0.038 69nm/℃和0.012 17nm/℃.该系统采用全光纤结构,光纤布拉格光栅嵌入到马赫-曾德干涉仪中,因而结构紧凑和简单,且易于实现.An optical fiber sensor based on a fiber Bragg grating and Mach-Zehnder interferometer was proposed and experimentally demonstrated for the measurement of curvature and temperature simultaneously.The sensor head is formed by combining a fiber Bragg grating with an all-fiber MachZehnder interferometer which consists of two cascaded peanut-shape structures.Experimental results show that the interference peaks of the Mach-Zehnder interferometer transmission spectrum and the resonance peaks of the fiber Bragg grating transmission spectrum have a different sensitivity to curvature and temperature change,so that a matrix can be used to realize the simultaneous measurement of the curvature and temperature.Curvature sensitivity of the Mach-Zehnder interferometer is-27.58nm/m-1while fiber Bragg grating is not sensitive to the curvature change.Temperature sensitivity of the MachZehnder interferometer and fiber Bragg grating in the experiment is 0.038 69nm/℃ and0.012 17nm/℃,respectively.This proposed sensor employs all-fiber structure and the fiber Bragg grating is inserted between two cascaded peanut-shape structures,so it is compact and easy to make.

关 键 词：光纤传感器 弯曲传感器 马赫-曾德干涉仪 光纤布拉格光栅 同时测量 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]