Towards 10 Gb/s OFDM-based visible light communication using a GaN violet micro-LED

Islim, Mohamed Sufyan and Ferreira, Ricardo X. and He, Xiangyu and Xie, Enyuan and Videv, Stefan and Viola, Shaun and Watson, Scott and Bamiedakis, Nikolaos and Penty, Richard V. and White, Ian H. and Kelly, Anthony E. and Gu, Erdan and Haas, Harald and Dawson, Martin D. (2017) Towards 10 Gb/s OFDM-based visible light communication using a GaN violet micro-LED. Photonics Research, 5 (2). A35-A43. ISSN 2327-9125 (https://doi.org/10.1364/PRJ.5.000A35)

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Abstract

Visible light communication (VLC) is a promising solution to the increasing demands for wireless connectivity. Micro-sized Gallium Nitride (GaN) light emitting diodes (mirco-LEDs) are strong candidates for VLC due to their high bandwidths. Segmented violet mirco-LEDs are reported in this work with electrical-to-optical bandwidths up to 655 MHz. An orthogonal frequency division multiplexing (OFDM) based VLC system with adaptive bit and energy loading is demonstrated and a data transmission rate of 11.95 Gb/s is achieved with a violet mirco-LED, when the nonlinear distortion of the mirco-LED is the dominant noise source of the VLC system. A record 7.91 Gb/s data transmission rate is reported below the forward error correction threshold using a single pixel of the segmented array when all the noise sources of the VLC system are present.

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