Results 271 to 280 of about 80,178 (324)

Self‐Supervised Coherence‐Based Denoising of Cryoseismological Distributed Acoustic Sensing Data

Johanna Zitt, Patrick Paitz, Andreas Fichtner, Fabian Thomas Walter, Josefine Umlauft   +4 more
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HDAS (High-Fidelity Distributed Acoustic Sensing) as a seismic surface wave monitoring tool along trackside dark fibers

Javier Preciado-Garbayo, Jorge Canudo, Miguel González‐Herráez, Hugo F. Martins, Maximilian Schaedler, Beatriz Gaite-Castrillo, José Benito Bravo-Monge, Irene de María, Miguel Rodrıguez-Plaza   +8 more
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Impulsive noise estimation for underwater acoustic OFDM communication using signal-noise separation and distributed compressed sensing methods

Xiaoyu Yang, Yuehai Zhou, Junhui Yao, Feng Tong   +3 more
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Monitoring industrial acoustics with distributed acoustic sensing

The Journal of the Acoustical Society of America, 2022
True-phase distributed acoustic sensing (DAS), a technique which uses low-power laser pulses to monitor along-fiber strain in optical cable, has proven useful in many geophysical research areas, including down-hole monitoring in oil/gas extraction, near-surface characterization, detecting and locating regional and global earthquakes, urban monitoring ...
Derrick Chambers, Peiyao Li, Harpreet Sethi, Jeffery Shragge   +3 more
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Distributed acoustic sensing in seismology

Optical Fiber Sensors Conference 2020 Special Edition, 2021
We review our recent work on chirped-pulse distributed acoustic sensing and its use for the characterization of teleseismic and microseismic activity. We show that this tool may offer impressive new capabilities in the field of seismology, particularly in underwater scenarios.
Miguel Gonzalez-Herraez, Maria R. Fernandez-Ruiz, Regina Magalhaes, Luis Costa, Hugo F. Martins, Andrés Garcia-Ruiz, Sonia Martin-Lopez, Ethan Williams, Zhongwen Zhan, Roel Vantilho   +9 more
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Distributed Acoustic Sensing in Seismology

27th International Conference on Optical Fiber Sensors, 2022
We review the use of Distributed Acoustic Sensing for the characterization of tele-seismic and micro-seismic activity. We show that this tool may offer impressive new capabilities in the field of seismology, particularly in underwater scenarios.
Miguel Gonzalez-Herraez, Maria R. Fernandez-Ruiz, Regina Magalhaes, Luis Costa, Hugo F. Martins, Carlos Becerril, Sonia Martin-Lopez, Ethan Williams, Zhongwen Zhan, Roel Vantilho, Arantza Ugalde, Antonio Villaseñor, Cesar Ranero   +12 more
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Quantitative Underwater Acoustic Measurements Using Distributed Acoustic Sensing

27th International Conference on Optical Fiber Sensors, 2022
Detection of surface and underwater targets was carried out using distributed acoustic sensing on the seabed fibre optic cables at a depth of ~180m.
R I Crickmore, C Minto, A Godfrey, R Ellwood   +3 more
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The intelligent distributed acoustic sensing

SPIE Proceedings, 2014
Distributed Acoustic Sensing (DAS) technology has progressed rapidly from being capable of event detection only to faithfully capturing the full acoustic signal (amplitude, frequency and phase) at all points along the sensing fibre. In this paper we demonstrate the performance of one such sensor and describe how the unique nature of DAS data enables a ...
Tom R. Parker, Arran Gillies, Sergey V. Shatalin, Mahmoud Farhadiroushan   +3 more
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Distributed Acoustic Sensing for Seismic Monitoring

Optical Fiber Communication Conference (OFC) 2021, 2021
Optical fiber networks can be transformed into powerful seismic sensing arrays through Distributed Acoustic Sensing (DAS). We review here the principles of DAS and the opportunities it offers in seismic monitoring, particularly in the sea-bottom.
Gonzalez-Herraez, Miguel, Fernández-Ruiz, María R., Magalhaes, Regina, Costa, Luis, Martins, Hugo F., Becerril, Carlos, Martin-Lopez, Sonia, Williams, Ethan, Zhan, Zhongwen, Vantilho, Roel   +9 more
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Time-Expansion in Distributed Acoustic Sensing

26th Optoelectronics and Communications Conference, 2021
We demonstrate a technique to achieve a customized temporal expansion of the time-domain trace in a phase-sensitive reflectometer, that allows the interrogation of fibers with high resolution (~2 cm) using only low-bandwidth photodetection (~MHz). © 2021 The Author(s)
Miguel Gonzalez-Herraez, Miguel Soriano-Amat, Vicente Durán, Hugo F. Martins, Sonia Martin-Lopez, María R. Fernández-Ruiz   +5 more
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