动静态监测光纤光栅传感信号的实验研究

基于可调谐光纤TF Fabry-Pent（FP）滤波扫描传感光纤Bragg光栅（FBG）反射峰的原理．提出一种新颖的探测方法，分别从动静态两方面监测传感FBG反射谱与TF F-P透射谱的合成谱。实验中．通过加载到TF F-P滤波器的驱动信号的不同，在静态监测下，模拟并分析了光信号功率与转化电压的趋势图以及多次实验中探测到最大信号时两者的关系；用双踪示波器动态实时监测并分析了经光电探测（PD）及其放大调理电路转换后的电压变化信号。实验结果表明．PD探测的最大值与传感FBG反射峰对应。经过标定后的系统分辨率可达1pm，测量精度为0．01nm。

Experimental Study of Signal Monitoring for Fiber Bragg Grating in the Dynamic and Static State

Based on the principle of tunable fiber Fabry-Perot(TF F-P) filter which scans the reflected peak of fiber Bragg grating(FBG),a novel detection method is advanced.The synthesis of reflected and transmitted spectrum is monitored in dynamic and static state respectively,which is realized by the different signals driving TF F-P filter.The chart between light power and voltage is simulated and analysed in the static state,and the dynamic signal is detected with the oscillograph.The experimental result is consistent with the theoretic analysis.Wavelength resolution of 1 pm and measuring precision of 0.01 nm are obtained in the calibrated system.