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Visible light communication using InGaN optical sources with AlInGaP nanomembrane down-converters.

J M M Santos, S Rajbhandari, D Tsonev

|May 4, 2016

Summary

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Visible light communication (VLC) achieved using InGaN micro-LEDs and laser diodes, down-converted by novel AlInGaP nanomembranes. This technology demonstrates high data rates for efficient wireless optical communication systems.

Area of Science:

Optoelectronics
Materials Science
Optical Communications

Background:

Visible light communication (VLC) offers a promising alternative for high-speed wireless data transmission.
Existing VLC systems face challenges in achieving high data rates and efficient light extraction.

Purpose of the Study:

To demonstrate free-space visible light communication using novel down-conversion nanomembranes with InGaN light sources.
To enhance light extraction efficiency and achieve high data transmission rates.

Main Methods:

Utilized red-emitting AlInGaP multi-quantum-well nanomembranes for down-conversion.
Integrated nanomembranes with Indium Gallium Nitride (InGaN) micro-light-emitting diodes (micro-LEDs) and laser diodes.
Employed capillary bonding and sapphire lenses for integrated optical sources and improved light extraction.

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Implemented pulse amplitude modulation (PAM) and orthogonal frequency division multiplexing (OFDM) for data transmission.

Main Results:

Achieved 870 Mb/s data transmission using micro-LEDs integrated with AlInGaP nanomembranes and PAM.
Demonstrated a data rate of 1.2 Gb/s using laser diodes pumped through the nanomembrane-lens structure with OFDM.
Sapphire lenses significantly improved the extraction efficiency of color-converted light.

Conclusions:

The developed AlInGaP nanomembrane technology enables high-performance free-space visible light communication.
This approach offers a viable path towards next-generation wireless optical communication systems with enhanced data rates and efficiency.