Open AccessDistribution profiling of a transverse load using the DGD spectrum of chirped FBGs
Author(s) -
Frédéric Descamps,
Christophe Caucheteur,
Patrice Mégret,
Sébastien Bette
Publication year - 2015
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.23.018203
Subject(s) - optics , fiber bragg grating , differential group delay , transverse plane , materials science , polarization (electrochemistry) , optical fiber , grating , polarization mode dispersion , physics , chemistry , structural engineering , engineering
In this paper, we propose a new method to determine the longitudinal distribution of a non-uniform transverse force applied to an optical fiber. For that purpose, we use a chirped fiber Bragg grating (CFBG) for which we monitor the polarization parameters in reflection. In particular, we demonstrate that the differential group delay (DGD) spectrum of the CFBG is an imprint of the load profile so that it can be used for the shape determination of an applied load. Thereafter, we discuss the influence of the CFBG parameters on the achievable accuracy and resolution of our technique. An experimental validation is finally reported with two 48 mm long CFBGs subject to step transverse load profiles.