Abstract
To the best of our knowledge, we present what we believe is a novel approach for fading noise reduction in distributed acoustic sensing (DAS). Rayleigh signals in multiple optical modes are collected by a phase-sensitive optical time-domain reflectometry system with a diversity detection scheme. An optimal weighted average algorithm is proposed to synthesize the phase demodulated from the Rayleigh signals, leading to the aggregate phase that presents acoustic signals with optimal fading noise reduction. The validity of the proposed approach is experimentally confirmed by comparison of the fading noise along a 12.8 km sensing fiber in a conventional DAS system and a DAS system that employs the proposed approach.
© 2021 Optical Society of America
Full Article | PDF ArticleMore Like This
Yu Wang, Lin Xiao, Yan Li, Bin Liang, Xin Liu, Qing Bai, Hongjuan Zhang, Yan Gao, and Baoquan Jin
Appl. Opt. 60(33) 10429-10436 (2021)
Xiangge He, Xiaohu Xu, Min Zhang, Shangran Xie, Fei Liu, Lijuan Gu, Yi Zhang, Yuting Yang, and Hailong Lu
Opt. Express 28(22) 33433-33447 (2020)
Fei Jiang, Zhenhai Zhang, Zixiao Lu, Honglang Li, Yahui Tian, Yixin Zhang, and Xuping Zhang
Opt. Express 29(21) 33467-33480 (2021)