Temperature independent strain measurement with a fiber grating tapered cavity sensor

Author

Weichong Du ; Xiaoming Tao ; Hwa-Yaw Tam

Author_Institution

Hong Kong Polytech., Kowloon, Hong Kong

Volume

11

Issue

5

fYear

1999

fDate

5/1/1999 12:00:00 AM

Firstpage

596

Lastpage

598

Abstract

A novel fiber grating tapered cavity sensor used for encoding strain into its spectral profile independently and its experimental demonstration are presented. The sensor possesses two spectral peaks within its main reflection band and the normalized power difference between the two peaks changes linearly with applied strain while it is independent of temperature variation. The accuracy of this particular sensor in measuring strain is estimated to be /spl plusmn/29 μ/spl epsi/ in a range of 1200 μ/spl epsi/.

Keywords

Bragg gratings; encoding; fibre optic sensors; measurement errors; strain measurement; applied strain; fiber grating tapered cavity sensor; main reflection band; normalized power difference; spectral peaks; spectral profile; strain encoding; strain measurement accuracy; temperature independent strain measurement; temperature variation; Bragg gratings; Capacitive sensors; Fiber gratings; Optical fiber polarization; Optical fiber sensors; Optical reflection; Strain measurement; Temperature measurement; Temperature sensors; Wavelength measurement;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/68.759410

Filename

759410