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提出了一种新型的应用于光纤布拉格光栅传感器的波长移动探测方案.研究基于保偏光纤的光纤环镜结构并建立理论模型,分析其输入光波长和输出光功率分配特性并进行数值仿真和实验验证.结果证明该装置结构简单、稳定性好、检测精度高且可通过调整光纤环镜参数调节测量范围和精度.在大于1nm解调范围内,波长平均解调精度小于1pm.
A new type of wavelength-shifting detection scheme for fiber Bragg grating sensors is proposed.The optical fiber ring mirror structure based on polarization-maintaining fiber is studied and a theoretical model is established to analyze its input optical wavelength and output optical power distribution characteristics and numerical simulation and experiment The results show that the device has the advantages of simple structure, good stability and high detection precision, and can adjust the measurement range and accuracy by adjusting the fiber ring mirror parameters. The average demodulation accuracy of the wavelength is less than 1 pm in the demodulation range greater than 1 nm.