波分复用加光栅光谱形状复用的FBG传感解调技术

Demodulation technique of FBG multiplexed sensing based on wave length division multiplexing and spectral shape multiplexing

针对光纤布拉格光栅(FBG)传感网络中可复用光栅的数量问题,提出波分复用(WDM)和光栅光谱形状复用结合的方法。通过MATLAB仿真和具体实验表明,WDM和光谱形状复用结合使用,在光谱宽度、测量范围和光栅谱宽一定的条件下,能使可复用的光栅数量比只用WDM时增加1倍,相比于其他多种复用技术结合的传感网络,解调系统更为简单。

To increase the number of multiplexed gratings in fiber Bragg grating(FBG) sensor networks,we propose a method which combines the wavelength division multiplexing(WDM) with the spectral shape multiplexing.The MATLAB simulation and experiment show the number of multiplexed gratings is doubled compared with that when only wavelength multiplexing is applied.The demodulation of this method is simpler than that of other sensor networks which combine multiple techniques.