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Proceedings Paper

Superimposed long period and short period Bragg grating sensor for LRI monitoring
Author(s): S. Triollet; L. Robert; E. Marin; Y. Ouerdane
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Paper Abstract

We report here an optical sensor based on fiber Bragg gratings to measure strain and temperature effects simultaneously. It has been shown that Long Period Grating (LPG) and Fiber Bragg Grating (FBG) exhibit different responses to an applied solicitation, thus strain and temperature influences can be determined separately by measuring the corresponding wavelength shifts [1,2]. In this paper we present a configuration based on the use of these two grating types: a LPG and a FBG written in the same fiber section, which allows us to discriminate the contributions of these two main solicitations. The sensor is embedded in a composite specimen manufactured by Liquid Resin Infusion (LRI) process for monitoring purpose.

Paper Details

Date Published: 5 October 2009
PDF: 4 pages
Proc. SPIE 7503, 20th International Conference on Optical Fibre Sensors, 75035L (5 October 2009); doi: 10.1117/12.836565
Show Author Affiliations
S. Triollet, Lab. Hubert Curien, CNRS (France)
Univ. of Toulouse (France)
L. Robert, Univ. of Toulouse (France)
E. Marin, Lab. Hubert Curien, CNRS (France)
Y. Ouerdane, Lab. Hubert Curien, CNRS (France)

Published in SPIE Proceedings Vol. 7503:
20th International Conference on Optical Fibre Sensors
Julian D. C. Jones, Editor(s)

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