High-sensitivity pressure sensor using a shielded polymer-coated fiber Bragg grating

Author

Zhang, Ying ; Feng, Dejun ; Liu, Zhiguo ; Guo, Zhuanyun ; Dong, Xiaoyi ; Chiang, K.S. ; Chu, Beatrice C B

Author_Institution

Inst. of Modern Opt., Nankai Univ., Tianjin, China

Volume

13

Issue

6

fYear

2001

fDate

6/1/2001 12:00:00 AM

Firstpage

618

Lastpage

619

Abstract

We demonstrate a novel high-sensitivity pressure sensor, which is based on the use of a fiber Bragg grating (FBG) embedded in a polymer-filled metal cylinder with an opening on one side to enhance the pressure sensitivity. The measured pressure sensitivity of the fractional change in the Bragg wavelength of our experimental sensor is -3.41/spl times/10/sup -3/ MPa/sup -1/ which is approximately 1720 times higher than that can be achieved with a bare FBG. The linearity of our sensor is also good. This sensor should find applications in the area of low-pressure measurement.

Keywords

Bragg gratings; fibre optic sensors; optical fibre cladding; polymer films; pressure sensors; FBG; fractional change; high-sensitivity pressure sensor; linearity; low-pressure measurement; polymer-filled metal cylinder; pressure sensitivity; shielded polymer-coated fiber Bragg grating; Bragg gratings; Capacitive sensors; Fiber gratings; Glass; Linearity; Optical fiber sensors; Photoelasticity; Polymer films; Pressure measurement; Wavelength measurement;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/68.924043

Filename

924043