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  11. Forward Polarization Sensing Triggered Area-focus Das Over A Bidirectional Coherent Network.

Forward polarization sensing triggered area-focus DAS over a bidirectional coherent network.

Jingchuan Wang, Maoqi Liu, Junwei Zhang

    Optics Letters
    |April 1, 2025

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    View abstract on PubMed

    Summary
    This summary is machine-generated.

    This study introduces a novel method for optical networks, using forward polarization to detect disturbances and guide distributed acoustic sensing (DAS). This approach reduces the need for continuous DAS operation, enhancing efficiency and lowering complexity for network surveillance.

    Area of Science:

    • Optical communication networks
    • Integrated sensing and communication systems

    Background:

    • Optical networks are increasingly incorporating sensing capabilities.
    • Distributed Acoustic Sensing (DAS) is a key technology for network monitoring.
    • Continuous operation of DAS generates significant data processing demands.

    Purpose of the Study:

    • To propose a method for preliminary perturbation detection in bidirectional coherent optical networks.
    • To leverage forward polarization information as a trigger for DAS.
    • To reduce the operational burden and data processing workload of DAS.

    Main Methods:

    • Utilizing forward polarization information from a bidirectional coherent network.
    • Employing equalization taps to extract sensing data.
    • Simultaneous bidirectional 60-GBaud 16-QAM transmission and forward polarization sensing.

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  • Triggering area-focused DAS based on preliminary sensing data.

    • Main Results:

    • Demonstrated preliminary detection of network perturbations using forward polarization.
    • Enabled targeted activation of DAS, focusing on specific areas of interest.
    • Significantly reduced the data processing workload for DAS.
    • Achieved fine-grained and ultra-low complexity sensing through integrated functions.

    Conclusions:

    • The proposed method effectively integrates communication and sensing in optical networks.
    • Forward polarization sensing acts as an efficient trigger for DAS, enhancing practicality.
    • This approach paves the way for advanced network applications and improved surveillance.