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Electronic Distance Measuring Instruments01:30

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DVS enabled fast beam tracking for underwater wireless laser communication.

Kuokuo Zhang, Xiaohe Dong, Caiming Sun

    Optics Express
    |November 11, 2025
    PubMed
    Summary
    This summary is machine-generated.

    This study introduces a fast beam tracking system using a dynamic vision sensor (DVS) and PID control for stable underwater wireless laser communication (UWLC). The system achieves millisecond-level tracking, crucial for mitigating underwater disturbances.

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    Area of Science:

    • Optical Engineering
    • Robotics and Control Systems
    • Oceanography

    Background:

    • Underwater wireless laser communication (UWLC) is vital for deep-sea exploration and operations.
    • Maintaining stable, high-data-rate UWLC is challenging due to millisecond-timescale underwater disturbances like flow and waves.
    • Existing tracking technologies struggle to compensate for rapid underwater interference.

    Purpose of the Study:

    • To propose a novel, fast beam tracking scheme for UWLC links.
    • To mitigate underwater disturbances and ensure link stability and high data rates.
    • To enhance the reliability of underwater communication systems.

    Main Methods:

    • Implementation of a dynamic vision sensor (DVS) for high-time-resolution light spot centroid detection (<1 ms).
    • Integration of a proportional-integral-derivative (PID) control algorithm for real-time beam alignment.
    • Development of a closed-loop control system with an 11 ms response time.

    Main Results:

    • The DVS-PID system achieved a temporal resolution of <1 ms for beam acquisition, the highest known for underwater applications.
    • Real-time beam alignment was successfully demonstrated within an 11 ms closed-loop control cycle.
    • Experimental validation confirmed the system's effectiveness in tracking under simulated underwater disturbances.

    Conclusions:

    • The combination of DVS and PID algorithms provides a simple, fast, and effective beam tracking solution for UWLC.
    • This technology is critical for overcoming challenges in underwater communication and enabling future breakthroughs.
    • The proposed method significantly improves the stability and reliability of underwater laser communication links.