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Enhancing the measurement range of a Brillouin-based fibre optic distributed-temperature sensor by improving receiver sensitivity through optical preamplification

Enhancing the measurement range of a Brillouin-based fibre optic distributed-temperature sensor by improving receiver sensitivity through optical preamplification
Enhancing the measurement range of a Brillouin-based fibre optic distributed-temperature sensor by improving receiver sensitivity through optical preamplification
We report on the use of a cost-effective erbium-doped based optical preamplifier in a single-ended distributed fiber-optic sensor to improve receiver sensitivity and hence measurement range. The improved accuracy of spontaneous Brillouin measurements was demonstrated in a 23km sensor and was limited by amplified spontaneous emission from the preamplifier, which was verified theoretically. Reduction of amplified spontaneous emission was achieved with a 0.37nm in-fiber Bragg grating. A signal-to-noise improvement of 17dB was achieved and supported by theory, which translates to approximately 40km range improvement for a single-mode sensing fiber having losses of 0.2dB/km at 1550nm.
325-336
de Souza, Keith P.
303d309a-efdb-4917-998b-3d399845bb86
Newson, Trevor P.
6735857e-d947-45ec-8163-54ebb25daad7
de Souza, Keith P.
303d309a-efdb-4917-998b-3d399845bb86
Newson, Trevor P.
6735857e-d947-45ec-8163-54ebb25daad7

de Souza, Keith P. and Newson, Trevor P. (2004) Enhancing the measurement range of a Brillouin-based fibre optic distributed-temperature sensor by improving receiver sensitivity through optical preamplification. Optics East 2004, Philadelphia, USA. 24 - 27 Oct 2004. pp. 325-336 . (doi:10.1117/12.573259).

Record type: Conference or Workshop Item (Paper)

Abstract

We report on the use of a cost-effective erbium-doped based optical preamplifier in a single-ended distributed fiber-optic sensor to improve receiver sensitivity and hence measurement range. The improved accuracy of spontaneous Brillouin measurements was demonstrated in a 23km sensor and was limited by amplified spontaneous emission from the preamplifier, which was verified theoretically. Reduction of amplified spontaneous emission was achieved with a 0.37nm in-fiber Bragg grating. A signal-to-noise improvement of 17dB was achieved and supported by theory, which translates to approximately 40km range improvement for a single-mode sensing fiber having losses of 0.2dB/km at 1550nm.

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More information

Published date: October 2004
Venue - Dates: Optics East 2004, Philadelphia, USA, 2004-10-24 - 2004-10-27

Identifiers

Local EPrints ID: 47899
URI: http://eprints.soton.ac.uk/id/eprint/47899
PURE UUID: b175add6-e387-44ce-98d7-edfe9bb57db2

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Date deposited: 10 Aug 2007
Last modified: 16 Sep 2021 16:32

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