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正弦相位调制型光纤传感器以正弦相位调制的全光纤光路,采用电子电路解调方案实现了实时相位解调,该光纤传感器测量微小位移分辨率达nm量级,工作频率范围为0.1～300Hz,不但可测微小位移及振动,也具有对瞬态位移进行检测的独特性能.文中阐述了此光纤传感器的工作原理及实验结果。
Sinusoidal phase modulation optical fiber sensor with sinusoidal phase modulation of all-fiber optical path, the use of electronic circuit demodulation scheme to achieve real-time phase demodulation, the optical fiber sensor to measure small displacement resolution of nm magnitude, the operating frequency range of 0.1 ~ 300Hz, not only Can measure tiny displacement and vibration, and also has the unique performance of detecting transient displacement.This paper describes the working principle and experimental results of this optical fiber sensor.