Open AccessHybrid LPFG/MEFPI sensor for simultaneous measurement of high-temperature and strain
Author(s) -
Yunjiang Rao,
Zengling Ran,
Xian Liao,
Hong-You Deng
Publication year - 2007
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.15.014936
Subject(s) - materials science , optics , temperature measurement , fiber optic sensor , optical fiber , fabry–pérot interferometer , interferometry , long period fiber grating , fiber bragg grating , laser , optoelectronics , polarization maintaining optical fiber , wavelength , physics , quantum mechanics
A hybrid fiber-optic sensor consisting of a long-period fiber grating (LPFG) and a micro extrinsic Fabry-Perot (F-P) interferometric (MEFPI) sensor is proposed and demonstrated for simultaneous measurement of high-temperature and strain. The LPFG written by using high-frequency CO(3+) laser pulses is used for high-temperature measurement while the MEFPI sensor fabricated by using 157nm F(2) laser pulses is used for strain measurement under high temperature. The distinguishing feature of such a hybrid fiber-optic sensor is that it can stand for high temperature of up to 650 masculineC and achieve precise measurement of strain under high temperature conditions simultaneously.