基于光纤环形激光器中锥形光纤布拉格光栅的温度无关倾斜仪。

A Temperature Independent Inclinometer Based on a Tapered Fiber Bragg Grating in a Fiber Ring Laser.

作者信息

Lin Weihao, Zhou Shengjie, Shao Liyang, Vai Mang I, Shum Perry-Ping, Xu Weijie, Zhao Fang, Yu Feihong, Liu Yibin, Liu Yuhui, Liu Shuaiqi

机构信息

Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen 518055, China.

Department of Electrical and Computer Engineering, Faculty of Science and Technology, University of Macau, Macau 999078, China.

出版信息

Sensors (Basel). 2021 Apr 21;21(9):2892. doi: 10.3390/s21092892.

DOI:10.3390/s21092892

PMID:33919007

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8122521/

Abstract

We demonstrate a new concept for an all-fiber inclinometer based on a tapered fiber Bragg grating (tFBG) in a fiber ring laser (FRL) with the capability of measuring the tilt angle and temperature simultaneously. The sensor performance is analyzed theoretically and investigated experimentally. The dependence of tilt angle on the spectral response in variable temperature conditions was measured. Two inclinometers with different lengths have been fabricated and characterized in FRL. The sensitivity is 0.583 dB/° and 0.849 dB/°, respectively, in the range of 0° to 90°. Thanks to the FRL system, narrow 3-dB bandwidth (<0.1 nm) and high optical signal-to-noise ratio (~60 dB) are achieved. The tFBG in the FRL system can be used for working as a temperature insensitive inclinometer. The results suggested that the proposed inclinometer has the advantages of compact size and convenient manufacture, enhancing its potential for application prospect.

摘要

我们展示了一种基于光纤环形激光器（FRL）中锥形光纤布拉格光栅（tFBG）的全光纤倾斜仪的新概念，它能够同时测量倾斜角和温度。对传感器性能进行了理论分析和实验研究。测量了可变温度条件下倾斜角对光谱响应的依赖性。制作了两个不同长度的倾斜仪，并在FRL中进行了表征。在0°至90°范围内，灵敏度分别为0.583 dB/°和0.849 dB/°。得益于FRL系统，实现了窄3 dB带宽（<0.1 nm）和高光学信噪比（~60 dB）。FRL系统中的tFBG可用于作为温度不敏感倾斜仪。结果表明，所提出的倾斜仪具有尺寸紧凑、制造方便的优点，增强了其应用前景的潜力。