Reduction of coherent noise in the Landau Placzek ratio method for distributed fibre optic temperature sensing


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), 285-289. (doi:10.1016/0030-4018(96)00344-6).

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Description/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.

Item Type: Article
ISSNs: 0030-4018 (print)
Related URLs:
Subjects: Q Science > QC Physics
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: University Structure - Pre August 2011 > Optoelectronics Research Centre
ePrint ID: 77992
Date Deposited: 11 Mar 2010
Last Modified: 27 Mar 2014 18:58
URI: http://eprints.soton.ac.uk/id/eprint/77992

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