26 Gbit/s LiFi system with laser-based white light transmitter

Lee, Changmin and Islim, Mohamed Sufyan and Das, Sovan and Spark, Adrian and Videv, Stefan and Rudy, Paul and Shah, Binith and McLaurin, Melvin and Haas, Harald and Raring, James (2022) 26 Gbit/s LiFi system with laser-based white light transmitter. Journal of Lightwave Technology, 40 (5). pp. 1432-1439. ISSN 0733-8724 (https://doi.org/10.1109/JLT.2021.3124942)

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Wedemonstrate a high-speed light fidelity (LiFi) communication system deploying ultra-high brightness laser-based white light illumination sources in a surface mount device (SMD) packaging platform. The LiFi transmitter SMD source provides 450 lumens of white light output with a brightness of 1000 cd/mm2 in a dual wavelength configuration comprising blue and infrared (IR) emitting laser diodes within the SMD. First, we present high-speed data transmission beyond 25 Gbit/s over a 3 meter channel distance with the combined data rates from the blue and IR lasers in the single SMD. Next, we present a 2.8 Gbit/s data rate with the dual wavelength laser SMD light source using a side-emissive fiber as the transmitter. This work proves the viability of LiFi systems deploying laser-based white light sources operating at very high data rates with the visible light and communication signal delivered in conventional free-space transmission architectures along with novel configurations using side-emitting fibers.