基于长周期光栅滤波的全光纤光纤光栅传感器研究

Research on All-Fiber FBG Sensor Based on Long-Period Fiber Grating Filter

设计了一种全光纤传感测试系统 ,采用长周期光纤光栅作为边带滤波器 ,对光纤布拉格光栅的传感信息进行解调 ,结合高信噪比的光电测量系统 ,传感测量的波长检测灵敏度为 1.94d B/nm,波长测量分辨率可达 0 .0 5 nm.

Design a kind of all fiber sensing interrogation system, by using long period fiber grating as edge filter to interrogate the sensing signal of the FBG sensor. The wavelength sensitivity and wavelength resolution of the sensing measurement is 1.94 dB/nm and 0.05 nm, due to the measurement system with high signal noise ratio.