Coherent OTDR Using Flexible All-Digital Orthogonal Phase Code Pulse for Distributed Sensing

Wenjie Chen; Junfeng Jiang; Kun Liu; Shuang Wang; Zhe Ma; Zhenyang Ding; Tianhua Xu; Tiegen Liu

doi:10.1109/ACCESS.2020.2992077

IEEE Access (Jan 2020)

Coherent OTDR Using Flexible All-Digital Orthogonal Phase Code Pulse for Distributed Sensing

Wenjie Chen,
Junfeng Jiang,
Kun Liu,
Shuang Wang,
Zhe Ma,
Zhenyang Ding,
Tianhua Xu,
Tiegen Liu

Affiliations

Wenjie Chen: ORCiD; School of Precision Instrument and Opto-electronics Engineering, Tianjin University, Tianjin, China
Junfeng Jiang: ORCiD; School of Precision Instrument and Opto-electronics Engineering, Tianjin University, Tianjin, China
Kun Liu: ORCiD; School of Precision Instrument and Opto-electronics Engineering, Tianjin University, Tianjin, China
Shuang Wang: School of Precision Instrument and Opto-electronics Engineering, Tianjin University, Tianjin, China
Zhe Ma: School of Precision Instrument and Opto-electronics Engineering, Tianjin University, Tianjin, China
Zhenyang Ding: ORCiD; School of Precision Instrument and Opto-electronics Engineering, Tianjin University, Tianjin, China
Tianhua Xu: ORCiD; School of Precision Instrument and Opto-electronics Engineering, Tianjin University, Tianjin, China
Tiegen Liu: School of Precision Instrument and Opto-electronics Engineering, Tianjin University, Tianjin, China

DOI: https://doi.org/10.1109/ACCESS.2020.2992077
Journal volume & issue: Vol. 8
pp. 85395 – 85400

Abstract

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A coherent optical time-domain reflectometer (COTDR) using flexible all-digital orthogonal phase code pulse is proposed for distributed acoustic sensing. All-digital orthogonal phase code pulse with frequency shift and time shift is used as probe. Coherent detection and balance photodetector are used to amplify interference signal and get rid of its direct-current (DC) component. The new scheme needs only single channel detection while keeping sampling frequency. Amplitude triangle modulation and frequency linear sweep modulation waveform are used for system performance investigation. The experiments on 15.4 km optical fiber showed that waveform information can be recovered well. The all-digital orthogonal phase code pulse will provide a flexible solution for different application requirement.

Published in IEEE Access

ISSN: 2169-3536 (Online)
Publisher: IEEE
Country of publisher: United States
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering
Website: https://ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=6287639

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