Advanced LiFi technology: Laser light

Changmin Lee; Mohamed Sufyan Islim; Stefan Videv; Adrian Sparks; Binith Shah; Paul Rudy; Melvin McLaurin; Harald Haas; James Raring

doi:10.1117/12.2537420

25 February 2020 Advanced LiFi technology: Laser light

Changmin Lee, Mohamed Sufyan Islim, Stefan Videv, Adrian Sparks, Binith Shah, Paul Rudy, Melvin McLaurin, Harald Haas, James Raring

Author Affiliations +

Proceedings Volume 11302, Light-Emitting Devices, Materials, and Applications XXIV; 1130213 (2020) https://doi.org/10.1117/12.2537420
Event: SPIE OPTO, 2020, San Francisco, California, United States

Abstract

We demonstrate high-speed LiFi data communication of over 20 Gbit/s using visible light from a laser-based white light emitting surface mount device (SMD) product platform that offers 10-100X the brightness of conventional LED sources. Equipped with high power blue laser diodes that offer over 3.5 GHz of 3 dB bandwidth, the laser-based white light SMD modules exhibited a signal-to-noise ratio (SNR) above 15 dB up to 1 GHz. The high SNR was combined with high order quadrature amplitude modulation (QAM) and orthogonal frequency division multiplexing (OFDM) to maximize the bandwidth efficiency. In this work, we present a laser based white light SMD module configured with a single 3W blue laser diode mounted on heat-sink, optically coupled to a collimating optic, achieving a LiFi data rate of up to 10 Gbit/s. Moreover, we demonstrate wavelength division multiplexing (WDM), from a white light SMD module configured with two blue laser diodes separated in peak wavelength to serve as separate communication channels. Using WDM, the dual laser SMD module enabled LiFi data rates of over 20 Gbit/s by simultaneously transmitting data over both channels.

Conference Presentation

Citation Download Citation

Changmin Lee, Mohamed Sufyan Islim, Stefan Videv, Adrian Sparks, Binith Shah, Paul Rudy, Melvin McLaurin, Harald Haas, and James Raring "Advanced LiFi technology: Laser light", Proc. SPIE 11302, Light-Emitting Devices, Materials, and Applications XXIV, 1130213 (25 February 2020); https://doi.org/10.1117/12.2537420

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