非本征法布里-珀罗干涉型传感器非周期信号的相位解调方法  

Phase Demodulation Method for Non-Periodic Signal in Extrinsic Fabry-Perot Interferometric Sensor

作　　者：张树桓 江毅[1,2] Zhang Shuhuan;Jiang Yi(School of Optics and Photonics,Beijing Institute of Technology,Beijing 100081,China;Key Laboratory of Photonic Information Technology,Ministry of Industry and Information Technology,Beijing 100081,China)

机构地区：[1]北京理工大学光电学院,北京100081 [2]信息光子技术工业和信息化部重点实验室,北京100081

出　　处：《光学学报》2022年第9期73-78,共6页Acta Optica Sinica

基　　金：国家自然科学基金(U20B2057,61775020)。

摘　　要：提出了一种恢复非本征法布里-珀罗干涉型(EFPI)传感器非周期动态信号的三波长正交相位补偿方法。利用三个干涉信号消除直流分量的影响,并通过相位补偿算法产生两个正交信号,用于解调出待测信号。在实验中对EFPI传感器加载一个非周期动态信号,使用三种不同的激光干涉测量技术对实验数据进行信号解调。结果表明,所提方法具有较高的解调精度,适用于高温环境下腔长变化的场合和非周期动态信号的测量。A three-wavelength quadrature phase compensation method for recovering non-periodic dynamic signals in an extrinsic Fabry-Perot interferometric(EFPI)sensor is proposed.The influence of the direct-current component is eliminated by using three interferometric signals,and two orthogonal signals are generated by the phase compensation algorithm to demodulate the signals to be tested.In the experiment,an aperiodic dynamic signal is loaded on the EFPI sensor,and three laser interferometric methods are used to demodulate the experimental data.The results show that the proposed method has higher demodulation accuracy,and is suitable for the high temperature environment with cavity length change and the measurement of non-periodic dynamic signals.

关 键 词：光通信 光纤传感器 非本征法布里-珀罗干涉仪 非周期信号 相位解调 

分 类 号：O436[机械工程—光学工程]