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Steerable pencil beams for multi-Gbps indoor optical wireless communication.

C W Oh, E Tangdiongga, A M J Koonen

    Optics Letters
    |October 15, 2015
    PubMed
    Summary

    A new optical wireless communication (OWC) system uses narrow beams to deliver multi-Gigabit-per-second speeds indoors. This technology achieves 10 Gbps over 2.5 meters, promising high-capacity in-building networks.

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    Area of Science:

    • Optical Wireless Communications
    • Free-space optics
    • High-speed data transmission

    Background:

    • Traditional wireless technologies face limitations in providing ultra-high capacity for indoor environments.
    • Optical Wireless Communication (OWC) offers a potential solution for high-bandwidth indoor networking.
    • Existing OWC systems may struggle with simultaneous user coverage and high data rates.

    Purpose of the Study:

    • To introduce a novel OWC system solution for multi-Gigabit-per-second indoor communication.
    • To demonstrate a system capable of directing narrow beams (pencil beams) to multiple users.
    • To achieve high data rates and wide coverage in short-range OWC applications.

    Main Methods:

    • Utilizing a tunable laser to generate narrow beams.
    • Employing a passive diffractive optical element for beam steering.
    • Implementing on-off keying modulation for data transmission.

    Main Results:

    • Demonstrated data rates of up to 10 Gbps over a distance exceeding 2.5 meters.
    • Achieved error-free communication links with beam steering over a 130 nm wavelength range.
    • Successfully steered beams with an angle of 17.16 degrees.

    Conclusions:

    • The developed OWC system effectively supports multi-Gbps capacity for indoor environments.
    • The use of pencil beams and diffractive optics enables simultaneous service to multiple users.
    • This system is a promising solution for short-range OWC and seamless integration into in-building optical networks.