Theoretical study of optimal gauge length in a helically wound cable for distributed acoustic sensing system

Kaiheng Yang; Tuanwei Xu; Lilong Ma; Fang Li

doi:10.1117/12.2547716

18 December 2019 Theoretical study of optimal gauge length in a helically wound cable for distributed acoustic sensing system

Kaiheng Yang, Tuanwei Xu, Lilong Ma, Fang Li

Author Affiliations +

Proceedings Volume 11340, AOPC 2019: Optical Fiber Sensors and Communication; 1134014 (2019) https://doi.org/10.1117/12.2547716
Event: Applied Optics and Photonics China (AOPC2019), 2019, Beijing, China

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.

Citation Download Citation

Kaiheng Yang, Tuanwei Xu, Lilong Ma, and Fang Li "Theoretical study of optimal gauge length in a helically wound cable for distributed acoustic sensing system", Proc. SPIE 11340, AOPC 2019: Optical Fiber Sensors and Communication, 1134014 (18 December 2019); https://doi.org/10.1117/12.2547716

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available