DWDM双边缘解调技术对光纤光栅压力传感器的影响

Effect of DWDM Double Edge Demodulation Technology of Fiber Grating Pressure Sensor

利用密集型波分复用器实现光纤光栅压力传感器的高灵敏度解调,通过实验得到双通道波分复用器2个边翼的透射谱分布,并构建了分段连续函数方程,实现了双边缘解调,解调的范围比单边缘扩大一倍,实验表明在0～3.6MPa范围内,该测试系统的引用误差小于1%,强度分辨力高于稀疏型波分复用器2个数量级。

The use of DWDM can achieve high sensitivity demodulation of fiber grating pressure sensor,and dual channel wavelength division multiplexer two wing transmission spectrum distribution was obtained by experiment,and continuous function equation segmentation was constructed,and double edge demodulation was realized. The scope of demodulation doubled than single edge. Experiments show that in the range of 0 ～ 3. 6 MPa in the test system,and the reference error is less than 1%,and the strength is better than the sparse WDM two orders of magnitude.