122km single-end phase-sensitive optical time domain reflectometer based on post signal processing method. Issue 1 (April 2021)

• Record Type: Journal Article
• Authors: Song, Muping; Wang, Yixuan; Chen, Ge; Zhang, Yuxin
• Is Part Of: Journal of physics. Volume 1873:Issue 1(2021)
• Publication Date: 2021-04
• Subjects: Physics -- Congresses; 530.5
• DOI: 10.1088/1742-6596/1873/1/012025
• Languages: English
• ISSNs: 1742-6588

Abstract

Abstract: Phase sensitive optical time domain reflectometer is able to detect vibration information. However, when it comes to ultra-long distance detection, the vibration signal is overwhelmed due to noise level and polarization fading. In this paper, a method is used to compensate noise and fading phenomenon based on post signal processing scheme, including sectional amplification, amplitude demodulation and adaptive matched filtering. On the basis of the theoretical analyzation of the detection method, the feasibility is verified by experiment. Vibration information from 122km can be detected.