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Distributed dynamic large strain optical fiber sensor based on the detection of spontaneous Brillouin scattering

Masoudi, Ali; Belal, Mohammad; Newson, Trevor P.. 2013 Distributed dynamic large strain optical fiber sensor based on the detection of spontaneous Brillouin scattering. Optics Letters, 38 (17). 3312. https://doi.org/10.1364/OL.38.003312

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Abstract/Summary

A Brillouin-based distributed optical fiber dynamic strain sensor is described which converts strain-induced Brillouin frequency shift into optical intensity variations by using an imbalanced Mach–Zhender interferometer. A 3×3 3×3 coupler is used at the output of this interferometer to permit differentiate and cross multiply demodulation. The demonstrated sensor is capable of probing dynamic strain disturbances over 2 km of sensing length every 0.5 s up to a strain of 10 mε with an accuracy of ±50  με ±50  με and spatial resolution of 1.3 m.

Item Type: Publication - Article
Digital Object Identifier (DOI): https://doi.org/10.1364/OL.38.003312
ISSN: 0146-9592
Date made live: 14 Nov 2019 09:06 +0 (UTC)
URI: http://nora.nerc.ac.uk/id/eprint/525829

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