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Interrogation method of a Bragg gratings based laser sensor using FFT

O. Méndez Zepeda, S. Muñoz Aguirre, G. Beltrán Pérez, and J. Castillo Mixcóatl

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Abstract

Multipoint laser sensors based on Bragg gratings usually identify the acting gratings. However they cannot quantify the signal change. In this work the Fourier discrete transform was used to identify and quantify such signal variations.

© 2010 Optical Society of America

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