多模光纤光栅的应变传感特性  

Strain sensing properties of multimode fiber Bragg gratings

作　　者：何伟[1] 李剑芝[1] 陈宏波[1] 梅加纯[1] 

机构地区：[1]武汉理工大学光纤传感技术研究中心,湖北武汉430070

出　　处：《传感器技术》2003年第12期15-17,共3页Journal of Transducer Technology

基　　金：国家自然科学基金资助项目(50179029)

摘　　要：主要对多模光纤光栅的应变传感特性进行了实验研究,实验结果表明,光纤光栅的Bragg波长随轴向应变的变化呈现出良好的线性关系,而且其重复性相当好。实验测得的应变灵敏度为0.0011nm/(×10-6),与理论计算值相符。这些特性与单模光纤光栅的传感特性基本相同,因此可以用多模光纤光栅代替单模光纤光栅制作光纤传感器以降低成本。实验结果可以作为对光纤光栅进一步深入研究的参考。The strain sensing properties of multimode fiber Bragg gratings are investigated experimentally. Experimental results show that the Bragg wavelength of grating in multimode graded-index fiber is linearly dependent on its axial strain, and the repeatability is good. The strain sensitivity measured in the experiment is (0.0011nm/0.0011nm/(×10^(-6))) which is almost consistent with that resulted from the theoretic calculation. The strain sensing properties of multimode fiber Bragg gratings are similar to that of conventional single-mode fiber Bragg gratings. So, multimode fiber gratings may replace single-mode fiber gratings to produce the sensors. The experimental results can also provide the reference for further studying on multimode fiber gratings.

关 键 词：多模光纤光栅 应变传感特性 Bragg波长 光纤布喇格光栅 

分 类 号：TN253[电子电信—物理电子学] TP212.14[自动化与计算机技术—检测技术与自动化装置]