Simple and potentially cost-effective demodulation technique for fiber Bragg grating sensor arrays

Mikhail G. Shlyagin; Vasilii V. Spirin; Serguei V. Miridonov; Ileana Marquez Borbon

doi:10.1117/12.417420

1 March 2001 Simple and potentially cost-effective demodulation technique for fiber Bragg grating sensor arrays

Mikhail G. Shlyagin, Vasilii V. Spirin, Serguei V. Miridonov, Ileana Marquez Borbon

Proceedings Volume 4204, Fiber Optic Sensor Technology II; (2001) https://doi.org/10.1117/12.417420
Event: Environmental and Industrial Sensing, 2000, Boston, MA, United States

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.

Citation Download Citation

Mikhail G. Shlyagin, Vasilii V. Spirin, Serguei V. Miridonov, and Ileana Marquez Borbon "Simple and potentially cost-effective demodulation technique for fiber Bragg grating sensor arrays", Proc. SPIE 4204, Fiber Optic Sensor Technology II, (1 March 2001); https://doi.org/10.1117/12.417420

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