Open AccessUltrahigh temperature and strain hybrid integrated sensor system based on Raman and femtosecond FBG inscription in a multimode gold-coated fiber
Author(s) -
Ismail Laarossi,
Pablo Roldán-Varona,
M. A. Quintela,
Luis Rodŕıguez-Cobo,
José Miguel LópezHiguera
Publication year - 2019
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.27.037122
Subject(s) - fiber bragg grating , materials science , optics , femtosecond , multi mode optical fiber , fiber optic sensor , optical fiber , calibration , raman spectroscopy , fiber , temperature measurement , optoelectronics , laser , composite material , physics , quantum mechanics
In this paper, a novel approach for hybrid systems combining Raman distributed sensors with fiber Bragg grating (FBG) sensors to carry out distributed and quasi-distributed temperature/strain measurements was proposed and experimentally demonstrated. Three FBGs were inscribed by the point-by-point technique in a simple setup for type I femtosecond inscription in a pure silica core multimode gold-coated fiber. Employing a single fiber, temperatures up to 600 °C and strains up to 4144 μɛ approximately were measured simultaneously and without interferences between both distributed and point measurements. Moreover, a new calibration technique was implemented to calibrate the distributed temperature system using the FBG measurements as reference.