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    This study demonstrates a novel wireless visible light communication system using III-nitride diodes. The system enables simultaneous transmission and reception of different light wavelengths, paving the way for advanced Internet of Things applications.

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    Area of Science:

    • Optoelectronics
    • Materials Science
    • Wireless Communication

    Background:

    • Multiple quantum well (MQW) III-nitride diodes possess dual light emission and detection capabilities.
    • The overlapping emission and detection spectra allow for efficient photon absorption of shorter wavelengths from identical structures.

    Purpose of the Study:

    • To establish a wireless visible light communication (VLC) system using pairs of III-nitride diodes with distinct wavelengths.
    • To explore the integration of multiple diode chips and optical filtering for enhanced communication performance.

    Main Methods:

    • Utilized two pairs of identical III-nitride diodes for green and blue light communication.
    • Integrated blue light chips with optical filtering and employed distributed Bragg reflection (DBR) coatings.
    • Implemented a single optical path system capable of full-duplex communication between same-wavelength chips.

    Main Results:

    • Successfully established wireless communication links for both green and blue light signals.
    • Demonstrated wavelength filtering using DBR coatings to improve channel purity and symbol demodulation.
    • Achieved simultaneous communication between same-wavelength chips within a single optical path.

    Conclusions:

    • The developed multifunctional equipment supports advanced single-optical path, III-nitride, full-duplex optical communication.
    • This technology is suitable for the deployment of the Internet of Things (IoT) requiring efficient wireless communication.