用于外腔法布里-珀罗干涉仪和光纤布拉格光栅传感器的并行解调系统及信号处理方法。

Parallel demodulation system and signal-processing method for extrinsic Fabry-Perot interferometer and fiber Bragg grating sensors.

作者信息

Jiang Junfeng, Liu Tiegen, Zhang Yimo, Liu Lina, Zha Ying, Zhang Fan, Wang Yunxin, Long Pin

机构信息

College of Precision Instrument and Opto-Electronics Engineering, Tianjin University, Tianjin 300072, China.

出版信息

Opt Lett. 2005 Mar 15;30(6):604-6. doi: 10.1364/ol.30.000604.

DOI:10.1364/ol.30.000604

PMID:15791990

Abstract

A parallel demodulation system for extrinsic Fabry-Perot interferometer (EFPI) and fiber Bragg grating (FBG) sensors is presented that is based on a Michelson interferometer and combines the methods of low-coherence interference and Fourier transform spectrum. Signals from EFPI and FBG sensors are obtained simultaneously by scanning one arm of a Michelson interferometer, and an algorithm model is established to process the signals and retrieve both the wavelength of the FBG and the cavity length of the EFPI at the same time, which are then used to determine the strain and temperature.

摘要

提出了一种用于外腔法布里-珀罗干涉仪（EFPI）和光纤布拉格光栅（FBG）传感器的并行解调系统，该系统基于迈克尔逊干涉仪，并结合了低相干干涉和傅里叶变换光谱方法。通过扫描迈克尔逊干涉仪的一个臂同时获取来自EFPI和FBG传感器的信号，并建立算法模型来处理信号，同时获取FBG的波长和EFPI的腔长，然后用于确定应变和温度。