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Simultaneous distributed fibre temperature and strain sensor using microwave coherent detection of spontaneous Brillouin backscatter

Simultaneous distributed fibre temperature and strain sensor using microwave coherent detection of spontaneous Brillouin backscatter
Simultaneous distributed fibre temperature and strain sensor using microwave coherent detection of spontaneous Brillouin backscatter
Simultaneous optical fibre distributed strain and temperature measurements have been obtained, by measuring the spontaneous Brillouin intensity and frequency shift, using the technique of microwave heterodyne detection. The enhanced stability from using a single coherent source combined with optical preamplification results in a highly accurate sensor. Using this sensor, distributed temperature sensing at 57 km and simultaneous distributed strain and temperature sensing at 30 km were achieved, the longest reported sensing lengths to date for these measurements. As a simultaneous strain and temperature sensor, a strain resolution of 100 µε and temperature resolution of 4 °C were achieved.
0957-0233
834-842
Maughan, S.M.
cc4e55d8-d9dc-4b2c-b44c-f70813cd1022
Kee, H.H.
2417a0d4-8d5b-447d-8ce7-dda23028ca70
Newson, T.P.
6735857e-d947-45ec-8163-54ebb25daad7
Maughan, S.M.
cc4e55d8-d9dc-4b2c-b44c-f70813cd1022
Kee, H.H.
2417a0d4-8d5b-447d-8ce7-dda23028ca70
Newson, T.P.
6735857e-d947-45ec-8163-54ebb25daad7

Maughan, S.M., Kee, H.H. and Newson, T.P. (2001) Simultaneous distributed fibre temperature and strain sensor using microwave coherent detection of spontaneous Brillouin backscatter. Measurement Science and Technology, 12 (7), 834-842. (doi:10.1088/0957-0233/12/7/315).

Record type: Article

Abstract

Simultaneous optical fibre distributed strain and temperature measurements have been obtained, by measuring the spontaneous Brillouin intensity and frequency shift, using the technique of microwave heterodyne detection. The enhanced stability from using a single coherent source combined with optical preamplification results in a highly accurate sensor. Using this sensor, distributed temperature sensing at 57 km and simultaneous distributed strain and temperature sensing at 30 km were achieved, the longest reported sensing lengths to date for these measurements. As a simultaneous strain and temperature sensor, a strain resolution of 100 µε and temperature resolution of 4 °C were achieved.

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More information

Published date: 2001
Organisations: Optoelectronics Research Centre

Identifiers

Local EPrints ID: 13688
URI: http://eprints.soton.ac.uk/id/eprint/13688
ISSN: 0957-0233
PURE UUID: 2c1211e5-2a6c-4734-b06d-c565c857ec59

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Date deposited: 13 Jan 2005
Last modified: 27 Apr 2022 12:16

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Contributors

Author: S.M. Maughan
Author: H.H. Kee
Author: T.P. Newson

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