Signal-to-noise ratio enhancement of Φ-OTDR based on Block-matching and 3D filtering

Jingming Zhang1; Yaxi Yan2; Shuaiqi Liu3; Alan Pak Tao Lau2; Changyuan Yu1; Liyang Shao1

10.1109/OECC56963.2023.10209664

2023

2166-8884

978-1-6654-6214-3

2023 Opto-Electronics and Communications Conference (OECC)

1-3

2-6 July 2023

Shanghai, China

Aiming at successful vibration extraction of Φ-OTDR under the condition of low signal-to-noise ratio (SNR), a differential intensity image denoising scheme based on Block-matching and 3D filtering (BM3D) is proposed. The correlation of data in time domain and space domain was utilized for denoising, which reduces noise significantly while retaining rich details. Distributed vibration sensing with a spatial resolution of 20 m over a 50 km distance was realized in the experiment. The SNR at the end of the optical fiber was increased from close to 0 dB to 37.2 dB.

Φ -OTDR BM3D signal denoising

其他

EI

20233714708042

Image denoising ; Optical fibers ; Signal to noise ratio

Information Theory and Signal Processing:716.1 ; Data Processing and Image Processing:723.2 ; Fiber Optics:741.1.2

IEEE

1.Department of Electronic and Information Engineering, The Hong Kong Polytechnic University, Hong Kong, China
2.Department of Electrical Engineering, The Hong Kong Polytechnic University, Hong Kong, China
3.Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen, China

Jingming Zhang,Yaxi Yan,Shuaiqi Liu,et al. Signal-to-noise ratio enhancement of Φ-OTDR based on Block-matching and 3D filtering[C],2023:1-3.