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Proceedings Paper

Theoretical study of optimal gauge length in a helically wound cable for distributed acoustic sensing system
Author(s): Kaiheng Yang; Tuanwei Xu; Lilong Ma; Fang Li
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Paper Abstract

A series of theoretical study of HWC for distributed acoustic sensing system is proposed to optimize the gaugh length. With the considition of SNR and spatial resolution, the optimal gaugh length is 0.4/(sinαcosθ) to 0.5/(sinαcosθ) times of the Ricker wavelet’s spatial wavelength, when the Ricker wavelet seismic wave travelles to the HWC with the wrapping angle α and the incident angle θ. Similar with the situation in DAS with straight fiber, the optimal gaugh length can achieve the SNR bigger than 90% of the maximum, and the deviation of detected temporal wavelength is less than 14%. Additional coefficient of 1/sinαcosθ is provided to any imping angle of the seismic wave and wrapping angle for the normal working environment.

Paper Details

Date Published: 18 December 2019
PDF: 7 pages
Proc. SPIE 11340, AOPC 2019: Optical Fiber Sensors and Communication, 1134014 (18 December 2019); doi: 10.1117/12.2547716
Show Author Affiliations
Kaiheng Yang, Institute of Semiconductors (China)
Tuanwei Xu, Institute of Semiconductors (China)
Lilong Ma, Institute of Semiconductors (China)
Univ. of Chinese Academy of Sciences (China)
Fang Li, Institute of Semiconductors (China)
Univ. of Chinese Academy of Sciences (China)


Published in SPIE Proceedings Vol. 11340:
AOPC 2019: Optical Fiber Sensors and Communication
Jie Zhang; Songnian Fu; Jun Yang, Editor(s)

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