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

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.
• 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.