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Long range Raman-Amplified Distributed Acoustic Sensor based on spontaneous Brillouin Scattering for large strain sensing

Long range Raman-Amplified Distributed Acoustic Sensor based on spontaneous Brillouin Scattering for large strain sensing
Long range Raman-Amplified Distributed Acoustic Sensor based on spontaneous Brillouin Scattering for large strain sensing
A Brillouin distributed acoustic sensor (DAS) based on optical time-domain refractometry exhibiting a maximum detectible strain of 8.7 mε and a low signal fading is developed. Strain waves with frequencies of up to 120 Hz are measured with an accuracy of 12 µε at a sampling rate of 1.2 kHz and a spatial resolution of 4 m over a sensing range of 8.5 km. The sensing range is further extended by using a modified inline Raman amplifier configuration. Using 80 ns Raman pump pulses, the signal-to-noise ratio is improved by 3.5 dB, while the accuracy of the measurement is enhanced by a factor of 2.5 to 62 µε at the far-end of a 20 km fiber
Brillouin-OTDR, DAS, DVS, Distributed acoustic sensor, Phase-OTDR, Strain sensor
1424-8220
Bakhtiari Gorajoobi, Shahab
ba37e5f9-6a5e-4beb-82eb-b932613fba55
Masoudi, Ali
8073fb9b-2e6c-46c9-89cf-cb8670d76dc0
Brambilla, Gilberto
815d9712-62c7-47d1-8860-9451a363a6c8
Bakhtiari Gorajoobi, Shahab
ba37e5f9-6a5e-4beb-82eb-b932613fba55
Masoudi, Ali
8073fb9b-2e6c-46c9-89cf-cb8670d76dc0
Brambilla, Gilberto
815d9712-62c7-47d1-8860-9451a363a6c8

Bakhtiari Gorajoobi, Shahab, Masoudi, Ali and Brambilla, Gilberto (2022) Long range Raman-Amplified Distributed Acoustic Sensor based on spontaneous Brillouin Scattering for large strain sensing. Sensors, 22 (5), [2047]. (doi:10.3390/s22052047).

Record type: Article

Abstract

A Brillouin distributed acoustic sensor (DAS) based on optical time-domain refractometry exhibiting a maximum detectible strain of 8.7 mε and a low signal fading is developed. Strain waves with frequencies of up to 120 Hz are measured with an accuracy of 12 µε at a sampling rate of 1.2 kHz and a spatial resolution of 4 m over a sensing range of 8.5 km. The sensing range is further extended by using a modified inline Raman amplifier configuration. Using 80 ns Raman pump pulses, the signal-to-noise ratio is improved by 3.5 dB, while the accuracy of the measurement is enhanced by a factor of 2.5 to 62 µε at the far-end of a 20 km fiber

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Accepted/In Press date: 3 March 2022
Published date: 6 March 2022
Keywords: Brillouin-OTDR, DAS, DVS, Distributed acoustic sensor, Phase-OTDR, Strain sensor

Identifiers

Local EPrints ID: 455306
URI: http://eprints.soton.ac.uk/id/eprint/455306
ISSN: 1424-8220
PURE UUID: 7e2effd1-3bf2-47f5-9ec8-8b1a7613d244
ORCID for Ali Masoudi: ORCID iD orcid.org/0000-0003-0001-6080
ORCID for Gilberto Brambilla: ORCID iD orcid.org/0000-0002-5730-0499

Catalogue record

Date deposited: 16 Mar 2022 18:06
Last modified: 28 Oct 2022 01:52

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Contributors

Author: Shahab Bakhtiari Gorajoobi
Author: Ali Masoudi ORCID iD

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