Open AccessIn-fiber Fabry-Perot interferometer for strain and magnetic field sensing
Author(s) -
G. Costa,
Paula M. P. Gouvêa,
Larissa M. B. Soares,
J.A.M. Pereira,
F. Fávero,
Arthur M. B. Braga,
Peter PalffyMuhoray,
A. C. Bruno,
Isabel C. S. Carvalho
Publication year - 2016
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.24.014690
Subject(s) - fiber bragg grating , optics , fabry–pérot interferometer , fiber optic sensor , materials science , optical fiber , interferometry , fusion splicing , magnetostriction , phosfos , polarization maintaining optical fiber , graded index fiber , photonic crystal fiber , plastic optical fiber , fiber , magnet , magnetic field , optoelectronics , physics , composite material , wavelength , quantum mechanics
In this paper we discuss the results obtained with an in-fiber Fabry-Perot interferometer (FPI) used in strain and magnetic field (or force) sensing. The intrinsic FPI was constructed by splicing a small section of a capillary optical fiber between two pieces of standard telecommunication fiber. The sensor was built by attaching the FPI to a magnetostrictive alloy in one configuration and also by attaching the FPI to a small magnet in another. Our sensors were found to be over 4 times more sensitive to magnetic fields and around 10 times less sensitive to temperature when compared to sensors constructed with Fiber Bragg Grating (FBG).