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. 10.1364/OL.38.003312

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Official URL: http://dx.doi.org/10.1364/OL.38.003312

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):	10.1364/OL.38.003312
ISSN:	0146-9592
Date made live:	14 Nov 2019 09:06 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/525829

Item Type:

Publication - Article

Digital Object Identifier (DOI):

10.1364/OL.38.003312

ISSN:

0146-9592

Date made live:

14 Nov 2019 09:06 +0 (UTC)

URI:

https://nora.nerc.ac.uk/id/eprint/525829