TL;DR: Researchers downscale GaN-based laser diodes to achieve high-speed modulation characteristics, achieving a 4. 47 GHz modulation bandwidth, and provide design guidelines for energy-efficient visible light communication systems in the post-5G era. JUNFEI WANG,1 JUNHUI HU,1,2CHAOWEN GUAN,1YUQI HOU,1,3ZENGYI XU,1LEIHAO SUN,1 YUE WANG,4 YUNING ZHOU,1 BOONS. OOI,4 JIANYANG SHI,1,2,3 ZIWEI LI,1,3 JUNWEN ZHANG,1,2,3 NAN CHI,1,2 SHAOHUA YU,2 AND CHAO SHEN1,2,3,* Visible light communication (VLC) based on laser diodes demonstrates great potential. InGaN-based high-speed mini laser diode surpasses PAM-4 visible light links by over 30 Gbps × SciEngine Journals&Books JOURNALS BOOKS CART CUSTOMER LOGIN Search SciEngine AI Intelligent Search Advanced Search Account Login Get verification code Forget the password Get code Sign in Register reset. Gallium Nitride (GaN) based light emitting diodes (LEDs) has been considered as a next generation lighting source due to its high efficiency, long lifetime, and high brightness. In addition to the lighting purpose, visible light communication (VLC) on LEDs has been studied since it is easily. Gallium nitride (GaN) laser diodes (LDs) are considered for visible light communications (VLC) in free space, underwater, and in plastic optical fibers (POFs).