一种新颖的光纤光栅振动传感方法  

A Novel Method for Fiber Grating Vibration Sensor

作　　者：董兴法[1] 黄勇林[2] 顾小刚[2] 开桂云[1] 董孝义[1] 

机构地区：[1]南开大学现代光学研究所,天津300071 [2]苏州科技学院电子系,苏州215011

出　　处：《压电与声光》2004年第5期357-359,389,共4页Piezoelectrics & Acoustooptics

基　　金："八六三"计划资助项目 ( 2 0 0 2 AA3 13 110 ) ;建设部信息化资助项目 ( 0 1-4 -0 48)

摘　　要：提出了一种用普通 F- P腔半导体激光器和与之纵模匹配的光纤 Bragg光栅为传感单元的振动传感方法。设计一个特殊机构放大振动产生的应变 ,实验结果证明 ,它能够提高检测灵敏度 ,适合于远距离微小振动的检测。振动频率达到 715 Hz、输入振动驱动功率为 2 m W时 ,仍能检测到不失真的振动信息。A novel method for fiber grating vibration sensor is presented in the paper,in which a simple F-P LD and a FBG matched with one of the longitudinal modes of the LD are used as sensing unit. By special design, vibration causing strain of FBG has been amplified. Experimental results show when the input vibration frequency is up to 715 Hz and the drive power is as low as 2mW, the output waveform is still distortionless.The factors affected the width of frequency band are also discussed.The method is easy to realize and to get better sensitivity.

关 键 词：光电子学 光纤BRAGG光栅 F-P腔激光器 振动传感 

分 类 号：TP212.74[自动化与计算机技术—检测技术与自动化装置]