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

Sensors

MangI. Vai¹  Weihao Lin²  Perry-Ping Shum²  Fang Zhao²  Shuaiqi Liu²  Liyang Shao²  Yibin Liu²  Yuhui Liu²  Feihong Yu²  Shengjie Zhou²  Weijie Xu² 

[1] Department of Electrical and Computer Engineering, Faculty of Science and Technology, University of Macau, Macau 999078, China;Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen 518055, China;

关键词: inclinometer;    tapered fiber Bragg grating;    fiber ring laser;   

DOI  :  10.3390/s21092892

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown