High-speed solar-blind optical wireless communications based on AlGaN deep-ultraviolet light-emitting diodes grown on AlN/sapphire templates with dense macro-steps

Kazunobu Kojima; Yuki Yoshida; Masaki Shiraiwa; Yoshinari Awaji; Atsushi Kanno; Naokatsu Yamamoto; Akira Hirano; Yosuke Nagasawa; Masamichi Ippommatsu; Shigefusa F. Chichibu

doi:10.1117/12.2649664

21 March 2023 High-speed solar-blind optical wireless communications based on AlGaN deep-ultraviolet light-emitting diodes grown on AlN/sapphire templates with dense macro-steps

Kazunobu Kojima, Yuki Yoshida, Masaki Shiraiwa, Yoshinari Awaji, Atsushi Kanno, Naokatsu Yamamoto, Akira Hirano, Yosuke Nagasawa, Masamichi Ippommatsu, Shigefusa F. Chichibu

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Proceedings Volume PC12421, Gallium Nitride Materials and Devices XVIII; (2023) https://doi.org/10.1117/12.2649664
Event: SPIE OPTO, 2023, San Francisco, California, United States

Abstract

Since the intensity of deep ultraviolet (DUV) light with the wavelength below 300 nm is nearly zero in the sun spectrum, optical wireless communications (OWC) based on DUV light can have a unique “zero-background” characteristics. We recently demonstrated LED-based DUV OWC at 280-nm band over a 1.5-m direct line-of-site channel realizing the effective data rate of as fast as >2 Gbps under standard room lighting and >1 Gbps under direct sun with outdoor experiments. These experiments were performed off-the-shell DUV AlGaN light-emitting diodes, which was grown by metalorganic vapor-phase epitaxy using an AlN/sapphire template with dense macrosteps.

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Kazunobu Kojima, Yuki Yoshida, Masaki Shiraiwa, Yoshinari Awaji, Atsushi Kanno, Naokatsu Yamamoto, Akira Hirano, Yosuke Nagasawa, Masamichi Ippommatsu, and Shigefusa F. Chichibu "High-speed solar-blind optical wireless communications based on AlGaN deep-ultraviolet light-emitting diodes grown on AlN/sapphire templates with dense macro-steps", Proc. SPIE PC12421, Gallium Nitride Materials and Devices XVIII, (21 March 2023); https://doi.org/10.1117/12.2649664

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KEYWORDS

Deep ultraviolet

Light emitting diodes

Wireless communications

Signal to noise ratio

Sun

Epitaxy

Interference (communication)

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