基于光功率解调的重叠谱光纤布拉格光栅传感器。

Overlap Spectrum Fiber Bragg Grating Sensor Based on Light Power Demodulation.

机构信息

Department of Electronic Information Science, Fujian Jiangxia University, Fuzhou 350007, China.

Fujian Provincial Key Laboratory for Photonics Technology, Fujian Normal University, Fuzhou 350007, China.

出版信息

Sensors (Basel). 2018 May 17;18(5):1597. doi: 10.3390/s18051597.

DOI:10.3390/s18051597

PMID:29772793

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5981642/

Abstract

Demodulation is a bottleneck for applications involving fiber Bragg gratings (FBGs). An overlap spectrum FBG sensor based on a light power demodulation method is presented in this paper. The demodulation method uses two chirp FBGs (cFBGs) of which the reflection spectra partially overlap each other. The light power variation of the overlap spectrum can be linked to changes in the measurand, and the sensor function can be realized via this relationship. A temperature experiment showed that the relationship between the overlap power spectrum of the FBG sensor and temperature had good linearity and agreed with the theoretical analysis.

摘要

解调是涉及光纤布拉格光栅（FBG）的应用的瓶颈。本文提出了一种基于光功率解调方法的重叠光谱 FBG 传感器。该解调方法使用两个啁啾光纤布拉格光栅（cFBG），其反射光谱部分重叠。重叠光谱的光功率变化可以与测量量的变化相关联，并且可以通过这种关系实现传感器功能。温度实验表明，FBG 传感器的重叠光功率谱与温度之间具有良好的线性关系，并且与理论分析一致。