Open AccessSIMULTANEOUS STRAIN AND TEMPERATURE MEASUREMENT USING COMBINED FIBER AND FIBER BRAGG GRATING SENSORS
Author(s) -
Hedi Bellil,
Mustafa A. G. Abushagur
Publication year - 2021
Publication title -
synchroinfo journal
Language(s) - English
Resource type - Journals
eISSN - 2664-0678
pISSN - 2664-066X
DOI - 10.36724/2664-066x-2021-7-3-6-10
Subject(s) - fiber bragg grating , phosfos , materials science , long period fiber grating , fiber optic sensor , optics , interferometry , graded index fiber , polarization maintaining optical fiber , dispersion shifted fiber , optical fiber , plastic optical fiber , temperature measurement , optoelectronics , wavelength , physics , quantum mechanics
We propose here a new technique for simultaneous strain and temperature measurement using a Fiber Bragg Grating sensors. This technique employs an interferometric detection using two Fiber Bragg Gratings. A fiber Bragg grating is used as a reference while another fiber Bragg grating and a length of a bare fiber are used as the two sensing elements. As the temperature and strain change, the length of the sensing elements, (Fiber and Fiber Bragg Grating) change. These changes result in a phase and wavelength shifts. To measure these effects we use a Folded Mach Zhender interferometer, and a detection system made out of two photodiodes and data processing system. The sensitivity and dynamic range are analyzed and presented.