Simultaneous strain and temperature measurement using a superstructure fiber Bragg grating

Author

Bai-Ou Guan ; Hwa-Yaw Tam ; Xiao-Ming Tao ; Xiao-Yi Dong

Author_Institution

Dept. of Electr. Eng., Hong Kong Polytech. Univ., Kowloon, Hong Kong

Volume

12

Issue

6

fYear

2000

fDate

6/1/2000 12:00:00 AM

Firstpage

675

Lastpage

677

Abstract

A novel and simple fiber-optic sensor based on a superstructure fiber Bragg grating (SFBG) for simultaneous strain and temperature measurement is proposed and demonstrated. The transmission spectrum of the sensor possesses several narrow-band loss peaks situated on the slope of a broad-band loss peak. By measuring the transmitted intensity and wavelength at one of the loss peaks, strain and temperature can be determined simultaneously. The accuracy of the sensor in measuring strain and temperature is estimated to be /spl plusmn/20 μ/spl epsiv/ in a range from 0 to 1200 μ/spl epsiv/ and /spl plusmn/1.2/spl deg/C from 20/spl deg/C to 120/spl deg/C, respectively.

Keywords

Bragg gratings; fibre optic sensors; measurement errors; optical fibre losses; strain measurement; temperature measurement; 20 to 120 C; broad-band loss peak; fiber-optic sensor; loss peaks; measurement accuracy; narrow-band loss peaks; strain measurement; superstructure fiber Bragg grating; temperature measurement; transmission spectrum; transmitted intensity; Capacitive sensors; Loss measurement; Narrowband; Optical fiber sensors; Propagation losses; Strain measurement; Temperature distribution; Temperature measurement; Temperature sensors; Wavelength measurement;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/68.849081

Filename

849081