Simultaneous Measurement for Strain and Temperature Based on a Long-Period Grating Combined With a High-Birefringence Fiber Loop Mirror

Author

Frazão, O. ; Marques, L.M. ; Santos, S. ; Baptista, J.M. ; Santos, J.L.

Author_Institution

INESC, Porto

Volume

18

Issue

22

fYear

2006

Firstpage

2407

Lastpage

2409

Abstract

This work presents an alternative solution for simultaneous measurement of strain and temperature. The sensing head is formed by a long-period fiber grating combined with a high-birefringence fiber loop mirror resulting in a configuration capable of temperature and strain discrimination. These optical devices have opposite sensitivity responses when a variation of temperature and/or strain is applied. Maximum errors of plusmn0.8degC and plusmn21muepsiv are reported over 60 degC and 700-muepsiv measurement ranges, respectively

Keywords

birefringence; diffraction gratings; fibre optic sensors; measurement errors; optical fibres; strain measurement; temperature measurement; birefringence; fiber loop mirror; long-period grating; measurement errors; strain measurement; temperature measurement; Capacitive sensors; Fiber gratings; Mirrors; Optical attenuators; Optical fiber polarization; Optical fibers; Optical filters; Optical sensors; Strain measurement; Temperature sensors; Fiber-loop mirror; long-period grating (LPG); optical fiber sensors; strain-temperature discrimination;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2006.886139

Filename

4012059