基于光纤腔衰落解调技术的光纤光栅传感研究  

Research on Fiber Grating Sensing Characters Using Fiber Cavity Ring Down Demodulation Technique

作　　者：刘波[1,2] 张键[1] 罗建花[1] 张卫华[1] 史青[1] 开桂云[1] 

机构地区：[1]南开大学现代光学所,光电信息技术教育部重点实验室,天津300071 [2]Photonics Research Group,ASTON University,Birmingham,UK,B4 7ET

出　　处：《光电子．激光》2007年第9期1043-1045,1051,共4页Journal of Optoelectronics·Laser

基　　金：国家'973'计划资助项目(2002A313110);国家'863'计划资助项目(2006AA01Z217);天津市高等学校科技发展基金资助(2006BA28);光电信息技术教育部重点实验室开放基金资助项目

摘　　要：采用弱调制长周期光纤光栅(LPG)作为基本传感器件,将其接入到光纤谐振腔中,利用光纤腔衰落(FRD)技术,通过检测脉冲激光的衰落时间实现光纤光栅传感的波长解调。进行了0～100℃温度和0～1000με应变实验,波长解调范围为10nm。An exploratory study on the temperature and strain sensor based on weak long period grating（LPG） and fiber ring is presented. This fiber ring-down（FRD） device consists of two matched fiber Bragg gratings,a section of single mode fiber, a weak long period grating,a pulsed laser source and a photodiode. The weak long period grating inserted in fiber ring cavity is used as sensing element which will cause additional loss is cavity. By measuring the fiber ring-down time in time domain, the temperature（0-100 ℃） and strain（0-1000 μt） sensing characteristics on weak long period grating are achieved. The demodulation wavelnegth range is 10 nm.

关 键 词：光纤腔衰落(FRD) 长周期光纤光栅(LPG) 传感 光腔衰落(CRD) 

分 类 号：TN253[电子电信—物理电子学]