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

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

doi:10.3390/s21092892

Sensors (Apr 2021)

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

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

Affiliations

Weihao Lin: Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen 518055, China
Shengjie Zhou: Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen 518055, China
Liyang Shao: Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen 518055, China
Mang I. Vai: Department of Electrical and Computer Engineering, Faculty of Science and Technology, University of Macau, Macau 999078, China
Perry-Ping Shum: Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen 518055, China
Weijie Xu: Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen 518055, China
Fang Zhao: Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen 518055, China
Feihong Yu: Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen 518055, China
Yibin Liu: Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen 518055, China
Yuhui Liu: Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen 518055, China
Shuaiqi Liu: Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen 518055, China

DOI: https://doi.org/10.3390/s21092892
Journal volume & issue: Vol. 21, no. 9
p. 2892

Abstract

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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.

Published in Sensors

ISSN: 1424-8220 (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Technology: Chemical technology
Website: http://www.mdpi.com/journal/sensors

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