摘要
提出并实验了一种探测光纤光栅波长移动的新方法。该方法用一组与各个传感光纤光栅的参数对应相同的光纤光栅作为滤波元件 ,用抖动倍频的方法跟踪传感光纤光栅的反射光谱的峰值点 ,同时采用高分辨率的光栅尺作为系统的读出设备 ,彻底消除了压电陶瓷的非线性性及滞后性带来的误差 。
A new method is presented to detect the wavelength shift on in fiber Bragg gratings.The system employs a series of in fiber Bragg gratings,having the same parameters as the sensing in fiber Bragg gratings,as filter elements.Furthermore,the system tracks the maximum wavelength of the reflected spectrum of in fiber Bragg gratings through dithering and doubling the frequency.A grating with high sensitivity is used to read the output of the system.The non linearity and hysteresis of PZT have been erased thoroughly,so the accuracy of the system is improved a lot.
出处
《激光技术》
CAS
CSCD
北大核心
2002年第2期84-85,96,共3页
Laser Technology
基金
清华大学博士点基金资助项目
