Vibration Detection and Localization Using Modified Digital Coherent Telecom Transponders

We demonstrate a vibration detection and localization scheme based on bidirectional transmission of telecom signals with digital coherent detection at the receivers. Optical phase is extracted from the digital signal processing blocks of the coherent receiver, from which the vibration component is e...

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Bibliographic Details
Published in:Journal of lightwave technology 2022-03, Vol.40 (5), p.1472-1482
Main Authors: Ip, Ezra, Huang, Yue-Kai, Wellbrock, Glenn, Xia, Tiejun, Huang, Ming-Fang, Wang, Ting, Aono, Yoshiaki
Format: Article
Language:English
Subjects:
acoustic sensing
Bandpass filters
Coherence
coherent detection
Digital signal processing
distributed sensing
interferometry
Localization
Optical fiber cables
optical fiber communations
optical fiber network
Optical fiber sensing
Optical fiber sensors
Optical fibers
Optical interferometry
Optical receivers
optical transponders
phase noise
quadrature amplitude modulation
Telecommunications
Transponders
Vibration
Vibrations
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Summary:We demonstrate a vibration detection and localization scheme based on bidirectional transmission of telecom signals with digital coherent detection at the receivers. Optical phase is extracted from the digital signal processing blocks of the coherent receiver, from which the vibration component is extracted by bandpass filtering, and the position along the cable closest to the vibration's epicenter is recovered by correlation. We demonstrate our scheme first using offline experiment with 200-Gb/s DP-16QAM, and we report field trial results over installed fiber to detect real-world vibration events.
ISSN:0733-8724
1558-2213
DOI:10.1109/JLT.2021.3137768