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Proceedings Paper

Performance enhancement for phase-sensitive OTDR based on multi-spatial resolution analysis
Author(s): Yusheng Chen; Yuanyuan Shan; Lu Cao; Wei Yang; Feng Wang; Yixin Zhang; Xuping Zhang
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Paper Abstract

Phase-sensitive optical time-domain reflectometry (Ф-OTDR) has been widely used to interrogate multi-point vibration events in the health monitoring and damage detection of civil infrastructures, mechanical processes and aerospace transportation. Due to the different lengths of the events, the spatial resolution (SR) requirements would also be different. This paper presents and demonstrates two kinds of Φ-OTDR sensing systems with multi-spatial resolution (MSR) analysis characteristics. Frequency division multiplexing (FDM) and multi-scale matching filtering schemes were introduced to provide MSR ability for the phase-discrimination and amplitude-discrimination Φ-OTDR systems respectively. The proposed methods could restore vibration events of different scales with optimum signal-to-noise ratio (SNR) in merely a single measurement while maintaining the detectable frequency range, which offered promising solutions for the performance optimization of Φ-OTDR sensing systems.

Paper Details

Date Published: 12 March 2020
PDF: 7 pages
Proc. SPIE 11436, 2019 International Conference on Optical Instruments and Technology: Optical Sensors and Applications, 1143603 (12 March 2020); doi: 10.1117/12.2539818
Show Author Affiliations
Yusheng Chen, Nanjing Univ. (China)
Yuanyuan Shan, Nanjing Univ. (China)
Lu Cao, Nanjing Univ. (China)
Wei Yang, Nanjing Univ. (China)
Feng Wang, Nanjing Univ. (China)
Yixin Zhang, Nanjing Univ. (China)
Xuping Zhang, Nanjing Univ. (China)

Published in SPIE Proceedings Vol. 11436:
2019 International Conference on Optical Instruments and Technology: Optical Sensors and Applications
Xuping Zhang; Hai Xiao, Editor(s)

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