Practical fiber-optic Bragg grating strain gauge system

A fiber-optic strain gauge system for use in structural monitoring and smart-structure applications is described. The strain gauge uses a fiber-optic Bragg grating sensor to measure strain and a passive, wavelength demodulation system to determine the wavelength of the narrow-band, backreflected spe...

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Bibliographic Details
Published in:Applied optics (2004) 1993-07, Vol.32 (19), p.3601-3609
Main Authors: Melle, S M, Liu, K, Measures, R M
Format: Article
Language:English
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Summary:A fiber-optic strain gauge system for use in structural monitoring and smart-structure applications is described. The strain gauge uses a fiber-optic Bragg grating sensor to measure strain and a passive, wavelength demodulation system to determine the wavelength of the narrow-band, backreflected spectrum from the grating sensor. The fiber-optic strain gauge system permits the measurement of both static and dynamic strains with a noise-limited resolution of 0.44 microstrain/√Hz, a measurement dynamic range of 27.8 dB, and a bandwidth of 250 Hz.
ISSN:1559-128X
DOI:10.1364/AO.32.003601