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White-lighting and WDM-VLC system using transmission gratings and an engineered diffuser
Optics Letters
|November 13, 2020
Summary
This study demonstrates a white-lighting and wavelength-division-multiplexing visible light communication system achieving 300 Gb/s. The innovative design integrates polarization multiplexing and advanced optics for high-speed data transmission and illumination.
Area of Science:
- Optoelectronics
- Optical Communications
- Lighting Technology
Background:
- Visible Light Communication (VLC) systems offer high bandwidth potential.
- Integrating communication and illumination functions is a key challenge.
- Wavelength-division-multiplexing (WDM) enhances data capacity in optical systems.
Purpose of the Study:
- To demonstrate a novel white-lighting and WDM-VLC system.
- To achieve high aggregate data transmission rates.
- To provide qualified indoor lighting simultaneously.
Main Methods:
- Utilized a red/green/blue (R/G/B) triple-source polarization-multiplexing scheme.
- Employed transmission gratings for WDM multiplexing and demultiplexing.
- Integrated an engineered diffuser with a double-convex lens for illumination.
Main Results:
- Achieved an aggregate transmission rate of 300 Gb/s using PAM4 modulation.
- Demonstrated free-space communication over 20 m and lighting over 3 m.
- Provided white-light illumination exceeding 100 lux.
Conclusions:
- The demonstrated system successfully integrates high-speed VLC with general lighting.
- This approach opens new possibilities for combined lighting and communication applications.
- The system meets both high data rate and illumination requirements.
