An all-fiber system for simultaneous interrogation of distributed strain and temperature sensing using spontaneous Brillouin scattering
An all-fiber system for simultaneous interrogation of distributed strain and temperature sensing using spontaneous Brillouin scattering
We demonstrate a low-loss, long-range, single-ended distributed optical fiber sensor to measure both temperature and strain simultaneously and unambiguously. By using the Landau-Placzek ratio and cascaded Mach-Zehnder interferometric filters, we measure both the intensity and the frequency changes in the Brillouin backscattered signal. Strain and temperature measurements can then be independently resolved. A temperature resolution of 4°C, a strain resolution of 290 µ.epsilon, and a spatial resolution of 10m have been achieved for a sensing length of 15 km.
695-697
Kee, H.H.
2417a0d4-8d5b-447d-8ce7-dda23028ca70
Lees, G.P.
0c1c9d69-debd-4e3c-a159-b3463564ca2e
Newson, T.P.
6735857e-d947-45ec-8163-54ebb25daad7
2000
Kee, H.H.
2417a0d4-8d5b-447d-8ce7-dda23028ca70
Lees, G.P.
0c1c9d69-debd-4e3c-a159-b3463564ca2e
Newson, T.P.
6735857e-d947-45ec-8163-54ebb25daad7
Kee, H.H., Lees, G.P. and Newson, T.P.
(2000)
An all-fiber system for simultaneous interrogation of distributed strain and temperature sensing using spontaneous Brillouin scattering.
Optics Letters, 25 (10), .
(doi:10.1364/OL.25.000695).
Abstract
We demonstrate a low-loss, long-range, single-ended distributed optical fiber sensor to measure both temperature and strain simultaneously and unambiguously. By using the Landau-Placzek ratio and cascaded Mach-Zehnder interferometric filters, we measure both the intensity and the frequency changes in the Brillouin backscattered signal. Strain and temperature measurements can then be independently resolved. A temperature resolution of 4°C, a strain resolution of 290 µ.epsilon, and a spatial resolution of 10m have been achieved for a sensing length of 15 km.
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2023
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Published date: 2000
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Local EPrints ID: 13631
URI: http://eprints.soton.ac.uk/id/eprint/13631
ISSN: 0146-9592
PURE UUID: b680b740-c947-489e-99f3-8f2fecd5c1e1
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Date deposited: 31 Dec 2004
Last modified: 15 Mar 2024 05:09
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Author:
H.H. Kee
Author:
G.P. Lees
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