Title :
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
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;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2006.886139
