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150km range distributed temperature sensor based on coherent detection of spontaneous Brillouin backscatter and in line Raman amplification

150km range distributed temperature sensor based on coherent detection of spontaneous Brillouin backscatter and in line Raman amplification
150km range distributed temperature sensor based on coherent detection of spontaneous Brillouin backscatter and in line Raman amplification
We report an extended range distributed temperature sensor based on coherent detection of the frequency shift of the spontaneous Brillouin backscatter combined with Raman amplification. The Raman amplification was achieved within the sensing fibre using either co- or counter-propagating Raman pump with respect to the probe pulse and experiments were conducted to investigate the optimum pump and probe power combination. With a co-propagating Raman pump a temperature resolution of 0.8C was achieved at a sensing range of 150km with 50m spatial resolution.
fiber optics, optical communications, fiber optics sensors, instrumentation, measurement, metrology, temperature, nonlinear optics, Raman effect, backscattering, Brillouin scattering, Raman scattering
0740-3224
1321-1324
Alahbabi, Mohammed N.
eb6eabf6-b8b1-4afe-947c-772f2336baf5
Cho, Yuh Tat
5d7e31ad-6b59-4edb-b82f-98d5a37f2af0
Newson, Trevor P.
6735857e-d947-45ec-8163-54ebb25daad7
Alahbabi, Mohammed N.
eb6eabf6-b8b1-4afe-947c-772f2336baf5
Cho, Yuh Tat
5d7e31ad-6b59-4edb-b82f-98d5a37f2af0
Newson, Trevor P.
6735857e-d947-45ec-8163-54ebb25daad7

Alahbabi, Mohammed N., Cho, Yuh Tat and Newson, Trevor P. (2005) 150km range distributed temperature sensor based on coherent detection of spontaneous Brillouin backscatter and in line Raman amplification. Journal of the Optical Society of America B, 22 (6), 1321-1324. (doi:10.1364/JOSAB.22.001321).

Record type: Article

Abstract

We report an extended range distributed temperature sensor based on coherent detection of the frequency shift of the spontaneous Brillouin backscatter combined with Raman amplification. The Raman amplification was achieved within the sensing fibre using either co- or counter-propagating Raman pump with respect to the probe pulse and experiments were conducted to investigate the optimum pump and probe power combination. With a co-propagating Raman pump a temperature resolution of 0.8C was achieved at a sensing range of 150km with 50m spatial resolution.

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Published date: June 2005
Keywords: fiber optics, optical communications, fiber optics sensors, instrumentation, measurement, metrology, temperature, nonlinear optics, Raman effect, backscattering, Brillouin scattering, Raman scattering

Identifiers

Local EPrints ID: 21013
URI: https://eprints.soton.ac.uk/id/eprint/21013
ISSN: 0740-3224
PURE UUID: 834c581d-52ee-4439-b206-08eef82d434a

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Date deposited: 07 Mar 2006
Last modified: 11 Nov 2019 19:36

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