Open AccessSimultaneous multi-point measurement of strain and temperature utilizing Fabry-Perot interferometric sensors composed of low reflective fiber Bragg gratings in a polarization-maintaining fiber
Author(s) -
Quoc Hung Bui,
Atsushi Wada,
Koken Fukushima,
Koki Nakaya,
Manuel Guterres Soares,
Satoshi Tanaka
Publication year - 2020
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.389844
Subject(s) - fiber bragg grating , optics , materials science , fabry–pérot interferometer , polarization maintaining optical fiber , fiber optic sensor , interferometry , birefringence , phosfos , polarization (electrochemistry) , optical fiber , long period fiber grating , photonic crystal fiber , optoelectronics , wavelength , physics , chemistry
A fiber Bragg grating (FBG)-based multi-point sensing system for the simultaneous measurement of strain and temperature is proposed, with a Fabry-Perot interferometer (FPI) consisting of low reflective FBGs inscribed inside a polarization-maintaining (PM) fiber is introduced as a sensor head. A multi-point sensing method with high dynamic range and short measurement time can be realized by analyzing the reflection spectrum of low reflective FBG-FPIs, and a simultaneous measurement of strain and temperature using two orthogonal polarization modes is enabled by the high birefringence of a PM fiber. An experimental demonstration of multi-point measurement utilizing the proposed system is reported.