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Proceedings Paper

Use of the polarization properties of fiber Bragg gratings for sensing purposes
Author(s): C. Caucheteur; S. Bette; R. Garcia-Olcina; M. Wuilpart; S. Sales; H. Ottevaere; F. Berghmans; H. Thienpont; J. Capmany; P. Mégret
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Paper Abstract

Birefringence in fiber Bragg gratings can result from two distinct effects that combine with the intrinsic fiber birefringence: the birefringence induced by the UV photo-writing and the birefringence due to a transversal load. In both cases, it leads to polarization dependent loss and differential group delay inside gratings. This paper aims to provide a characterization, both theoretically and experimentally, of the polarization dependent loss and the differential group delay generated by uniform Bragg gratings written into single mode optical fibers. We demonstrate that the measured polarization properties can be accurately reconstructed by means of the coupled mode theory and the Jones formalism. We also demonstrate that the PDL and DGD evolutions contain information about birefringence and can thus be used for transverse force sensing purposes. Experimental results obtained on fiber Bragg gratings transversally loaded by an external force confirm the simulated evolutions.

Paper Details

Date Published: 25 April 2006
PDF: 11 pages
Proc. SPIE 6189, Optical Sensing II, 618922 (25 April 2006); doi: 10.1117/12.662817
Show Author Affiliations
C. Caucheteur, Faculté Polytechnique de Mons (Belgium)
S. Bette, Faculté Polytechnique de Mons (Belgium)
R. Garcia-Olcina, Univ. Politècnica de València (Spain)
M. Wuilpart, Faculté Polytechnique de Mons (Belgium)
S. Sales, Univ. Politècnica de València (Spain)
H. Ottevaere, Vrije Univ. Brussel (Belgium)
F. Berghmans, Vrije Univ. Brussel (Belgium)
H. Thienpont, Vrije Univ. Brussel (Belgium)
J. Capmany, Univ. Politècnica de València (Spain)
P. Mégret, Faculté Polytechnique de Mons (Belgium)

Published in SPIE Proceedings Vol. 6189:
Optical Sensing II
Brian Culshaw; Anna G. Mignani; Hartmut Bartelt; Leszek R. Jaroszewicz, Editor(s)

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