Enhancing fibre-optic distributed acoustic sensing capabilities with blind near-field array signal processing

• Published in: Nature communications Vol. 13; no. 1; pp. 4019 - 12
• Main Authors: Muñoz, Felipe, Soto, Marcelo A.
• Format: Journal Article
• Language: English
• Published: London Nature Publishing Group UK 11.07.2022; Nature Publishing Group; Nature Portfolio
• Subjects: 639/624/1075/1083; 639/624/1075/187; 639/624/1107/510; Acoustic propagation; Acoustics; Arrays; Beamforming; Fiber optics; Humanities and Social Sciences; multidisciplinary; Near fields; Optical fibers; Optics; Science; Science (multidisciplinary); Sensors; Signal distortion; Signal processing; Signal to noise ratio; Sound sources; Spatial filtering; Vibrations; Wave propagation; Waveforms

Distributed acoustic sensors (DAS) can monitor mechanical vibrations along thousands independent locations using an optical fibre. The measured acoustic waveform highly varies along the sensing fibre due to the intrinsic uneven DAS longitudinal response and distortions originated during mechanical w...