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Programmable 1.47 Tb/s (92 Gb/s x 16) optical wireless broadcasting system empowered by a single spatial light

Quan You, Chao Li, Xi Xiao

    Optics Express
    |July 16, 2021
    PubMed
    Summary

    Researchers developed a programmable optical wireless system using a spatial light modulator (SLM) to create 16 access points. This system achieves over 1.47 Tb/s total wireless capacity for future mobile networks.

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    Area of Science:

    • Optical Wireless Communication
    • Free-Space Optics
    • Reconfigurable Optical Systems

    Background:

    • High-capacity indoor wireless networks are crucial for future mobile communication.
    • Existing optical wireless systems face limitations in flexibility and capacity.
    • Spatial Light Modulators (SLMs) offer potential for dynamic beam steering and multi-access capabilities.

    Purpose of the Study:

    • To propose and demonstrate a programmable multi-access-point optical wireless broadcasting system.
    • To achieve high total wireless capacity and reconfigurability for indoor environments.
    • To explore the use of a single SLM for generating and distributing multiple optical beams.

    Main Methods:

    • Employed a single spatial light modulator (SLM) with a modified rotated-splitting-SLM algorithm.
    • Developed a continuous tunable broadcasting algorithm to generate and distribute 16 access points.
    • Transmitted 92-Gb/s Pulse Amplitude Modulation with 4 levels (PAM-4) optical signals over 1 km of single-mode fiber and 1.2 m of free space.

    Main Results:

    • Successfully demonstrated a programmable multi-access-point optical wireless broadcasting system.
    • Generated 16 arbitrarily distributed access points with a ±15° field-of-view.
    • Achieved a total wireless capacity exceeding 1.47 Tb/s.

    Conclusions:

    • The proposed system offers ultra-high transmission capacity and reconfigurability.
    • This technology is suitable for future indoor wireless mobile networks.
    • The use of a single SLM provides an efficient solution for multi-access optical wireless broadcasting.