Efficient visible light communication drivers using illumination LEDs in industrial environments Schneider, Daniel Shrotri, Abhijeet Narendra Flatt, Holger Stübbe, Oliver Lachmayer, Roland Cheben, Pavel Čtyroký, Jiří Molina-Fernández, Iñigo Optical Wireless Communication Visible Light Communication VLC Li-Fi Illumination Dual-purpose drivers Visible light communication (VLC) allows the dual use of lighting and wireless communication systems by modulation of illumination devices. However, to increase the performance, typically, beam-forming measures are taken creating pencil beams, thus contradicting the illumination purpose. In order to optimize the performance trade o between ecient illumination and communication, the switching capabilities of illumination LEDs are examined. Illumination LEDs with standard drivers and without beam-forming show limited applicability for communication purposes as they are not optimized for the necessary switching capability (f 11 MHz) and coherence. Methods to enhance the electrical current by pre-equalisation, biasing, carrier sweeping and current shaping are examined in respect to the illumination LED's communication performance. A novel driver scheme is derived which achieves considerably higher switching frequencies (f 100 MHz) without employing beamforming at the illumination LED. This driver is able to obtain a data rate of up to 200 Mbit/s at a distance of 3.2 m, using on-o keying (OOK) modulation technique. Therefore, it is feasible to apply the LED driver by implementing standardised illumination devices in VLC systems. SPIE 2021 info:eu-repo/semantics/conferenceObject doc-type:conferenceObject text http://purl.org/coar/resource_type/c_5794 https://www.th-owl.de/elsa/record/7672 Schneider D, Shrotri AN, Flatt H, Stübbe O, Lachmayer R. Efficient visible light communication drivers using illumination LEDs in industrial environments. In: Cheben P, Čtyroký J, Molina-Fernández I, eds. <i>Integrated Optics: Design, Devices, Systems and Applications VI</i>. Vol 11775. Proceedings of SPIE. SPIE; 2021. doi:<a href="https://doi.org/10.1117/12.2588923">10.1117/12.2588923</a> eng info:eu-repo/semantics/altIdentifier/doi/10.1117/12.2588923 info:eu-repo/semantics/altIdentifier/issn/0277-786X info:eu-repo/semantics/altIdentifier/issn/1996-756X info:eu-repo/semantics/altIdentifier/isbn/978-1-5106-4384-0 info:eu-repo/semantics/closedAccess