Air Acoustic Sensing based on High-performance DAS and Ultra-simple Transducer Structure

Jianfang Tang; Minghao Hu; Xuanyu Zheng; Fei Peng

doi:10.20944/preprints202210.0293.v1

Preprint Communication Version 1 Preserved in Portico This version is not peer-reviewed

Version 1 : Received: 19 October 2022 / Approved: 20 October 2022 / Online: 20 October 2022 (03:02:21 CEST)

Fiber distributed optical fiber acoustic sensor (DAS) is generally used in distributed long-distance acoustic/vibration measurement. We found that DAS with excellent performance of low self-noise and anti-fading in combination with the plastic structure in daily life as an acoustic transducer can achieve high-sensitivity acoustic measurement at a single point rather than designing a state-of-the-art acoustic transducer or using special enhanced scattering fiber. The simple acoustic transducer we proposed for DAS can reach the sensitivity level of -106.5dB re. 1rad/μPa at a sensing range of 5.1 km, which can meet many demands on the industrial site.

optical fiber; distributed acoustic sensing; phase‐sensitive OTDR (optical time domain reflectometry)

Physical Sciences, Optics and Photonics

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Air Acoustic Sensing based on High-performance DAS and Ultra-simple Transducer Structure

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