光纤光栅振动解调方法对比分析  

Comparative analysis of FBG vibration sensing demodulation methods

作　　者：李永倩[1] 王宇[1] 姚国珍[1] 

机构地区：[1]华北电力大学电子与通信工程系,河北保定071003

出　　处：《光通信研究》2014年第4期46-50,共5页Study on Optical Communications

基　　金：河北省自然科学基金资助项目(E2012502045);国家自然科学基金资助项目(61377088)

摘　　要：为能依据振动检测要求合理选择FBG(光纤布拉格光栅)振动解调方案,提高FBG振动解调系统性能,文章深入剖析了FBG光强式振动解调系统中影响解调性能的各种因素,通过MATLAB软件对匹配光栅法、边缘滤波法及激光匹配法的系统灵敏度和解调范围进行了对比,分析了改变FBG 3dB带宽时三种方法灵敏度和解调范围的变化趋势,分析结果对合理搭建FBG振动解调系统具有参考价值。In order to select a rational Fiber Bragg Grating（FBG）vibration demodulation scheme in accordance with the vibration detection requirements and enhance the performance of FBG vibration sensing demodulation systems,this paper dissects in depth various factors affecting the system demodulation performances,compares the system sensitivity and demodulation range of matching FBG method,edge filter method and laser matching method by using MATLAB software and analyses the variation trends of the sensitivity and demodulation range of these three methods when 3dB bandwidth of FBG is changed.The results have some value of reference for rationally building an FBG vibration sensing demodulation system.

关 键 词：光纤布拉格光栅 振动解调系统 灵敏度 解调范围 

分 类 号：TN253[电子电信—物理电子学]