We have demonstrated a long distance distributed vibration fiber-optic sensing system based on phase-sensitive optical time-domain reflectometer (φ-OTDR). Without any additional components, vibration detection utilizing heterodyne detection and digital coherent detection is successfully demonstrated over a 50-km-long optical fiber and the external disturbance signal simulated by PZT is well restored with signal- to-noise ratio (SNR) of ~32.8 dB through phase difference method. For the first time, the distributed vibration sensing based on phase-extraction is realized in optical fiber over such a long distance. This measuring technique is ideal for applications in fields of oil and gas pipeline monitoring, national borders and can be further optimized to realize the longer sensing distance.

© 2017 Optical Society of America

PDF Article
More Like This
Enhancing Laser Phase-noise Immunity of Distributed Vibration Sensor by Phase-extraction φ-OTDR

Yuying Shao, Huanhuan Liu, Peng Peng, Fufei Pang, Guoqin Yu, Zhen Chen, Na Chen, and Tingyun Wang
Su4B.4 Asia Communications and Photonics Conference (ACPC) 2018

Wideband Fully-Distributed Vibration Sensing by Using UWFBG Based Coherent OTDR

Fan Ai, Qizhen Sun, Wei Zhang, Tao Liu, Zhijun Yan, and Deming Liu
W2A.19 Optical Fiber Communication Conference (OFC) 2017

Phase-sensitive OTDR system based on digital coherent detection

Zhengqing Pan, Kezhen Liang, Qing Ye, Haiwen Cai, Ronghui Qu, and Zujie Fang
83110S Asia Communications and Photonics Conference and Exhibition (ACP) 2011


You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
Login to access OSA Member Subscription