Reduction of coherent noise in the Landau Placzek ratio method for distributed fibre optic temperature sensing
Reduction of coherent noise in the Landau Placzek ratio method for distributed fibre optic temperature sensing
The Landau Placzek ratio method for distributed fibre optic temperature sensing is based on the ratio of the Rayleigh and Brillouin backscattered light. However, because of the coherent nature of Rayleigh scattering. use of the same narrow bandwidth source as required for the Brillouin signal results in significant coherent noise in the Rayleigh signal. A novel technique is demonstrated whereby the amplified spontaneous emission noise and amplifying properties of an erbium doped fibre amplifier may be exploited to reduce the coherent noise on the Rayleigh backscatter signal. This results in a significant improvement in both temperature and spatial resolution over previously reported results.
285-289
Wait, P.C.
5cb979e7-285b-48a0-8b5f-0761ef2da484
Newson, T.P.
6735857e-d947-45ec-8163-54ebb25daad7
1996
Wait, P.C.
5cb979e7-285b-48a0-8b5f-0761ef2da484
Newson, T.P.
6735857e-d947-45ec-8163-54ebb25daad7
Wait, P.C. and Newson, T.P.
(1996)
Reduction of coherent noise in the Landau Placzek ratio method for distributed fibre optic temperature sensing.
Optics Communications, 131 (4-6), .
(doi:10.1016/0030-4018(96)00344-6).
Abstract
The Landau Placzek ratio method for distributed fibre optic temperature sensing is based on the ratio of the Rayleigh and Brillouin backscattered light. However, because of the coherent nature of Rayleigh scattering. use of the same narrow bandwidth source as required for the Brillouin signal results in significant coherent noise in the Rayleigh signal. A novel technique is demonstrated whereby the amplified spontaneous emission noise and amplifying properties of an erbium doped fibre amplifier may be exploited to reduce the coherent noise on the Rayleigh backscatter signal. This results in a significant improvement in both temperature and spatial resolution over previously reported results.
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Published date: 1996
Identifiers
Local EPrints ID: 77992
URI: http://eprints.soton.ac.uk/id/eprint/77992
ISSN: 0030-4018
PURE UUID: c26e4b2c-f5cf-4d06-86ff-d745be549bfd
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Date deposited: 11 Mar 2010
Last modified: 14 Mar 2024 00:03
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Author:
P.C. Wait
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