A Displacement Sensor Based on a Temperature-Insensitive Double Trapezoidal Structure With Fiber Bragg Grating

Author

Zhong, Chuan ; Shen, Chang-yu ; Chu, Jin-lei ; Zou, Xin ; Li, Ke ; Jin, Yong-xing ; Wan, Jian-feng

Author_Institution

Inst. of Optoelectron. Technol. of China, JiLiang Univ., Hangzhou, China

Volume

12

Issue

5

fYear

2012

fDate

5/1/2012 12:00:00 AM

Firstpage

1280

Lastpage

1283

Abstract

A novel temperature-insensitive displacement sensor based on a fiber Bragg grating (FBG) is presented. A FBG was glued into a V-shaped groove, which lies on the lower surface of a double trapezoidal beam. It is found that the 3-dB bandwidth of the reflection spectra and output optical power of the FBG changed linearly with the variation of the displacement of the beam. High sensitivity of 0.25 and 3.70 were achieved. The sensor is temperature-insensitive through measuring the bandwidths of the reflection spectra and optical power of the reflected signal.

Keywords

Bragg gratings; displacement measurement; fibre optic sensors; reflectivity; FBG; V-shaped groove; bandwidth measurement; beam displacement variation; double trapezoidal beam; fiber Bragg grating; reflected signal optical power; reflection spectra; temperature-insensitive displacement sensor; temperature-insensitive double trapezoidal structure; Fiber gratings; Optical reflection; Optical sensors; Optical variables measurement; Temperature measurement; Temperature sensors; Displacement sensor; double trapezoidal beam; fiber Bragg grating (FBG); temperature-insensitive;

fLanguage

English

Journal_Title

Sensors Journal, IEEE

Publisher

ieee

ISSN

1530-437X

Type

jour

DOI

10.1109/JSEN.2011.2169665

Filename

6029407