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Proceedings Paper

Superimposed Bragg gratings written into polarization maintaining fiber for monitoring micro-strains
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Paper Abstract

Fiber Bragg gratings constitute excellent sensor elements, able to measure static and dynamic fields, such as temperature and pressure. We demonstrate that superimposed Bragg gratings written into hydrogen-loaded polarization maintaining fiber can be used to quantitatively monitor micro-strains or characterize the shrinkage of different cements. In fact, since the fiber Bragg gratings are written with a sufficient wavelength spacing between their Bragg wavelength, they exhibit different sensitivities and consequently, they allow the simultaneous measurement of temperature, strain, pressure and transversal force, which is sufficient to completely characterize shrinkage. We discuss the calibration of these superimposed gratings making use of a completely automated system allowing to load the fiber both in the axial and transversal direction and to apply controlled temperature changes.

Paper Details

Date Published: 28 September 2005
PDF: 10 pages
Proc. SPIE 5952, Optical Fibers: Applications, 59520M (28 September 2005); doi: 10.1117/12.622826
Show Author Affiliations
C. Caucheteur, Faculté Polytechnique de Mons (Belgium)
H. Ottevaere, Vrije Univ. Brussel (Belgium)
T. Nasilowski, Vrije Univ. Brussel (Belgium)
K. Chah, Faculté Polytechnique de Mons (Belgium)
G. Statkiewicz, Wraclaw Univ. of Technology (Poland)
W. Urbanczyk, Wraclaw Univ. of Technology (Poland)
F. Berghmans, Vrije Univ. Brussel (Belgium)
SCK-CEN (Belgium)
H. Thienpont, Vrije Univ. Brussel (Belgium)
P. Mégret, Faculté Polytechnique de Mons (Belgium)

Published in SPIE Proceedings Vol. 5952:
Optical Fibers: Applications
Leszek R. Jaroszewicz; Brian Culshaw; Anna Grazia Mignani, Editor(s)

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