Multiplexed polarization OTDR system with high DOP and ability of multi-event detection

Abstract

A novel polarization optical time domain reflectometry (POTDR) with high degree of polarization is proposed for multi-event detection. By employing multiple $2\times 2$ optical fiber couplers and fiber mirrors, an arbitrary number and customized length of sensing fiber can be multiplexed into the system without modification of the other components, e.g., the light source, photodetector, signal processing device, etc. More importantly, the signal-to-noise ratio of this system is significantly improved, and the temporal depolarization effect can be almost completely suppressed. Additionally, the system response time is considerably reduced by dispensing with data averaging, so that intrusion events such as touching and moving fiber can be detected instantaneously and precisely located. Experiments have been conducted that proved the capability of multi-event simultaneous detection and vibration frequency measurement. This system promises application potential in multi-zone perimeter security and physical field measurement.

© 2017 Optical Society of America

Simplex coded polarization optical time domain reflectometry system

Chaodong Wang, Ruolin Liao, Wenbo Chen, Ming Tang, Songnian Fu, Jianguan Tang, Ciming Zhou, and Deming Liu
Opt. Express 25(5) 5550-5558 (2017)

Distributed optical fiber vibration sensor based on spectrum analysis of Polarization-OTDR system

Ziyi Zhang and Xiaoyi Bao
Opt. Express 16(14) 10240-10247 (2008)

Ultra-long high-sensitivity Φ-OTDR for high spatial resolution intrusion detection of pipelines

Fei Peng, Han Wu, Xin-Hong Jia, Yun-Jiang Rao, Zi-Nan Wang, and Zheng-Pu Peng
Opt. Express 22(11) 13804-13810 (2014)

Multi-event waveform-retrieved distributed optical fiber acoustic sensor using dual-pulse heterodyne phase-sensitive OTDR

Xiangge He, Shangran Xie, Fei Liu, Shan Cao, Lijuan Gu, Xiaoping Zheng, and Min Zhang
Opt. Lett. 42(3) 442-445 (2017)

Grating-assisted polarization optical time-domain reflectometry for distributed fiber-optic sensing

Ming Han, Yunjing Wang, and Anbo Wang
Opt. Lett. 32(14) 2028-2030 (2007)