Line-of-Sight Visible Light Communications With InGaN-Based Resonant Cavity LEDs

Efficient InGaN-based resonant-cavity light-emitting diodes (RCLEDs) are investigated as potential light sources for visible light communications. Experimentally, InGaN multiple-quantum-well LEDs with a reasonable crystalline quality for blue light emission were grown by metal organic vapor phase ep...

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Bibliographic Details
Published in:IEEE photonics technology letters 2013-09, Vol.25 (18), p.1793-1796
Main Authors: Tsai, Chia-Lung, Xu, Zhong-Fan
Format: Article
Language:English
Subjects:
InGaN
Light emitting diodes
line-of-sight optical link
Optical device fabrication
Optical fiber communication
Optical filters
Optical receivers
Optical reflection
Optical transmitters
resonant-cavity light emitting diodes (RCLEDs)
visible light communications
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Summary:Efficient InGaN-based resonant-cavity light-emitting diodes (RCLEDs) are investigated as potential light sources for visible light communications. Experimentally, InGaN multiple-quantum-well LEDs with a reasonable crystalline quality for blue light emission were grown by metal organic vapor phase epitaxy. A two-pair distributed Bragg reflector, along with a metallic Ag layer, was used to form a structure containing an optical cavity. The resulting InGaN RCLEDs exhibit improved performance over conventional LEDs in terms of light output power, external quantum efficiency, and directionality. In addition, two plano-convex lenses with facing convex surfaces were used to build a directed line-of-sight optical link between the transmitter and the receiver. Data transmission with rates up to 100 Mbit/s is demonstrated over a distance of 100 cm, implying the potential for indoor visible light communications with phosphor-converted white RCLEDs, provided that the slow-responding phosphorescent emission could be effectively filtered.
ISSN:1041-1135
1941-0174
DOI:10.1109/LPT.2013.2276105