Field Trial of Coexistence and Simultaneous Switching of Real-Time Fiber Sensing and Coherent 400 GbE in a Dense Urban Environment

Recent advances in optical fiber sensing have enabled telecom network operators to monitor their fiber infrastructure while generating new revenue in various application scenarios including data center interconnect, public safety, smart cities, and seismic monitoring. However, given the high utiliza...

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Bibliographic Details
Published in:Journal of lightwave technology 2024-02, Vol.42 (4), p.1304-1311
Main Authors: Wang, Zehao, Huang, Yue-Kai, Ip, Ezra, Qi, Zhenzhou, Zussman, Gil, Kilper, Dan, Asahi, Koji, Kageshima, Hideo, Aono, Yoshiaki, Chen, Tingjun
Format: Article
Language:English
Subjects:
Cities
coexistence
Coherence
coherent transmission
Computer networks
Data transmission
Dense Wavelength Division Multiplexing
distributed acoustic sensing
Fiber optics
field trial
Integrated fiber sensing and communication
Metropolitan areas
Multiplexers
Optical communication
Optical fiber cables
Optical fiber sensors
Optical fiber testing
Optical fibers
Optical signal processing
Optical switches
Optical switching
Preempting
Public safety
Radio signals
Real time
Switching theory
Time constant
Urban environments
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Summary:Recent advances in optical fiber sensing have enabled telecom network operators to monitor their fiber infrastructure while generating new revenue in various application scenarios including data center interconnect, public safety, smart cities, and seismic monitoring. However, given the high utilization of fiber networks for data transmission, it is undesirable to allocate dedicated fiber strands solely for sensing purposes. Therefore, it is crucial to ensure the reliable coexistence of fiber sensing and communication signals that co-propagate on the same fiber. In this article, we conduct field trials in a reconfigurable optical add-drop multiplexer (ROADM) network enabled by the PAWR COSMOS testbed, utilizing metro area fibers in Manhattan, New York City. We verify the coexistence of real-time constant-amplitude distributed acoustic sensing (DAS), coherent 400 GbE, and analog radio-over-fiber (ARoF) signals. Measurement results obtained from the field trial demonstrate that the quality of transmission (QoT) of the coherent 400 GbE signal remains unaffected during co-propagation with DAS and ARoF signals in adjacent dense wavelength-division multiplexing (DWDM) channels. In addition, we present a use case of this coexistence system supporting preemptive DAS-informed optical path switching before link failure.
ISSN:0733-8724
1558-2213
DOI:10.1109/JLT.2023.3319166