光纤光栅传感系统有源时域解调技术  

Time-Domain Demodulation Technique for Active Fiber Bragg Grating Sensor System

作　　者：余有龙[1] 赵洪霞[1] 刘盛春[1] 高来勖[1] 

机构地区：[1]黑龙江大学光纤技术研究所,黑龙江哈尔滨150080

出　　处：《中国激光》2004年第8期983-987,共5页Chinese Journal of Lasers

基　　金：黑龙江省教育厅科学技术研究重大项目 (编号 :10 5 31Z0 10 );黑龙江省 2 0 0 1年杰出青年基金;国家自然科学基金;中国节能投资公司联合研究基金 (批准号 :6 0 1770 2 9)资助课题

摘　　要：将传感光栅用作环形器光纤激光器的端镜 ,腔中接一受压电陶瓷 (PZT)驱动的具滤波功能的匹配光栅 ,受正弦波电压信号驱动 ,通过观察同一驱动周期中激光输出两谷值在时域中的间隔 ,进而判断作用在传感光栅上的轴向待测应变。在 - 14 0～ 72 0 με范围内 ,其传感分辨率为 1 8με ,灵敏度为 88 15 2 με/ms。A ring cavity fiber laser based fiber Bragg grating (FBG) sensor system, in which two FBGs are used, is reported in this paper. One of the employed gratings, acted as the end mirror, is sensor element. Another is used as a tunable filter controlled by a piezoelectric stack, which is driven by an electrical sine wave signal. The measured strain applied on the sensor axially can be judged by observing the interval of the output laser between two notches within a driving period in time domain. Experiment demonstrated that the sensing sensitivity and the resolution of this system are 88.152 με/ms and 1.8 με respectively, within the work range of from -140 με to 720 με. The perturbation of the environmental temperature was proved not to affect the measured results theoretically. It was verified by experiments.

关 键 词：集成光学 光纤光栅 传感系统 时域解调 有源 

分 类 号：TP212.14[自动化与计算机技术—检测技术与自动化装置]