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Proceedings Paper

Simple and potentially cost-effective demodulation technique for fiber Bragg grating sensor arrays
Author(s): Mikhail G. Shlyagin; Vasilii V. Spirin; Serguei V. Miridonov; Ileana Marquez Borbon
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Paper Abstract

A new demodulation technique for fiber Bragg grating based sensors is presented. The technique makes a use of pairs of low reflectance Bragg gratings forming a low finesse Fabry-Perot local sensor. The gratings in a pair have different sensitivity to a measurand, and overlapping of their reflectance spectra depends on the external influence. Demodulation is based on measurement of the degree of the grating’s spectra overlapping by means of energy of interference pattern in reflection spectrum of the interferometer. We demonstrate implementation of the proposed technique in experiments with axial strain and temperature measurements.

Paper Details

Date Published: 1 March 2001
PDF: 9 pages
Proc. SPIE 4204, Fiber Optic Sensor Technology II, (1 March 2001); doi: 10.1117/12.417420
Show Author Affiliations
Mikhail G. Shlyagin, CICESE (United States)
Vasilii V. Spirin, CICESE (United States)
Serguei V. Miridonov, CICESE (Mexico)
Ileana Marquez Borbon, CICESE (United States)

Published in SPIE Proceedings Vol. 4204:
Fiber Optic Sensor Technology II
Brian Culshaw; Michael A. Marcus; Brian Culshaw; James A. Harrington; Michael A. Marcus; Mohammed Saad, Editor(s)

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