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 m [Formula: see text] and a low signal fading is developed. Strain waves with frequencies of up to 120 Hz are measured with an accuracy of 12 [Formula: see text] at...

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Autores principales: Bakhtiari Gorajoobi, Shahab, Masoudi, Ali, Brambilla, Gilberto
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8915083/
https://www.ncbi.nlm.nih.gov/pubmed/35271194
http://dx.doi.org/10.3390/s22052047
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author Bakhtiari Gorajoobi, Shahab
Masoudi, Ali
Brambilla, Gilberto
author_facet Bakhtiari Gorajoobi, Shahab
Masoudi, Ali
Brambilla, Gilberto
author_sort Bakhtiari Gorajoobi, Shahab
collection PubMed
description A Brillouin distributed acoustic sensor (DAS) based on optical time-domain refractometry exhibiting a maximum detectible strain of 8.7 m [Formula: see text] and a low signal fading is developed. Strain waves with frequencies of up to 120 Hz are measured with an accuracy of 12 [Formula: see text] 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 [Formula: see text] at the far-end of a 20 km fiber.
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spelling pubmed-89150832022-03-12 Long Range Raman-Amplified Distributed Acoustic Sensor Based on Spontaneous Brillouin Scattering for Large Strain Sensing Bakhtiari Gorajoobi, Shahab Masoudi, Ali Brambilla, Gilberto Sensors (Basel) Article A Brillouin distributed acoustic sensor (DAS) based on optical time-domain refractometry exhibiting a maximum detectible strain of 8.7 m [Formula: see text] and a low signal fading is developed. Strain waves with frequencies of up to 120 Hz are measured with an accuracy of 12 [Formula: see text] 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 [Formula: see text] at the far-end of a 20 km fiber. MDPI 2022-03-06 /pmc/articles/PMC8915083/ /pubmed/35271194 http://dx.doi.org/10.3390/s22052047 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Bakhtiari Gorajoobi, Shahab
Masoudi, Ali
Brambilla, Gilberto
Long Range Raman-Amplified Distributed Acoustic Sensor Based on Spontaneous Brillouin Scattering for Large Strain Sensing
title Long Range Raman-Amplified Distributed Acoustic Sensor Based on Spontaneous Brillouin Scattering for Large Strain Sensing
title_full Long Range Raman-Amplified Distributed Acoustic Sensor Based on Spontaneous Brillouin Scattering for Large Strain Sensing
title_fullStr Long Range Raman-Amplified Distributed Acoustic Sensor Based on Spontaneous Brillouin Scattering for Large Strain Sensing
title_full_unstemmed Long Range Raman-Amplified Distributed Acoustic Sensor Based on Spontaneous Brillouin Scattering for Large Strain Sensing
title_short Long Range Raman-Amplified Distributed Acoustic Sensor Based on Spontaneous Brillouin Scattering for Large Strain Sensing
title_sort long range raman-amplified distributed acoustic sensor based on spontaneous brillouin scattering for large strain sensing
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8915083/
https://www.ncbi.nlm.nih.gov/pubmed/35271194
http://dx.doi.org/10.3390/s22052047
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