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    A novel massive micro-light-emitting diode (micro-LED) array enables high-speed underwater wireless optical communication. This system achieves 165 Mbps at 37.7m and 90 Mbps at 73.5m, confirming feasibility for long-distance, high-data-rate applications.

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    Area of Science:

    • Optoelectronics
    • Underwater Communications
    • Materials Science

    Background:

    • Underwater wireless optical communication (UWOC) is crucial for current underwater applications.
    • Micro-light-emitting diodes (micro-LEDs) are promising light sources for UWOC.
    • Limited transmission distance due to low optical power of single micro-LEDs necessitates advanced solutions.

    Purpose of the Study:

    • To propose a novel underwater wireless optical communication system.
    • To overcome the transmission distance limitations of single micro-LEDs.
    • To demonstrate high data rates and extended communication distances in UWOC.

    Main Methods:

    • Fabrication of a massive Gallium Nitride (GaN) micro-LED array with over 5000 pixels.
    • Utilizing flip-chip technology for micro-LED array integration.
    • Experimental setup for testing the performance of the UWOC system.

    Main Results:

    • The developed massive micro-LED array system achieved a data rate of 165 Mbps at a transmission distance of 37.7 meters.
    • A data rate of 90 Mbps was achieved at a longer transmission distance of 73.5 meters.
    • Demonstrated the system's capability for high data rates over significant underwater distances.

    Conclusions:

    • The novel massive GaN micro-LED array is feasible for high-speed UWOC.
    • The system confirms the potential for achieving both high data rates and long transmission distances in underwater environments.
    • This technology provides a viable solution for advanced underwater communication needs.