基于旋光效应的FBG传感解调方法

Demodulation Method of FBG Sensing System Based on Optical Rotation Effect

摘要:

阐述了利用石英晶体旋光效应实现FBG传感系统的解调原理, 理论分析了石英晶体的旋光率与波长之间的变化关系。结果表明, 旋光率随波长的增加逐渐减小, 在834~841nm范围内近似呈线性变化。设计了双光路检测系统, 对石英晶体的旋光率与波长之间的响应关系进行了验证, 实验结果与理论分析一致。

Abstract:

The demodulation theory of FBG sensing system based on optical rotation effect was explained, and the relationship between the specific rotation and the incident wavelength was analyzed. The results show that along with the increasing wavelength, the specific rotation decreases and it shows linear variations in the range of 834~841nm. The dual optical path detection system was designed to verify the response between specific rotation and the incident wavelength, and it is indicated that the experiment result is consistent with the theory analysis.