2 Gbps free-space ultraviolet-C communication based on a high-bandwidth micro-LED achieved with pre-equalization
Shijie Zhu, Pengjiang Qiu, Zeyuan Qian, Xinyi Shan, Zhou Wang, Ke Jiang, Xiaojuan Sun, Xugao Cui, Guoqi Zhang, Dabing Li, Pengfei Tian
Abstract
In this Letter, we experimentally achieve high-speed ultraviolet-C (UVC) communication based on a 276.8 nm UVC micro-LED. A record ${-}{{3}}\;{\rm{dB}}$ optical bandwidth of 452.53 MHz and light output power of 0.854 mW at a current density of ${{400}}\;{\rm{A/c}}{{\rm{m}}^2}$ are obtained with a chip size of 100 µm. A UVC link over 0.5 m with a data rate of 2 Gbps is achieved using 16-ary quadrature amplitude modulation orthogonal frequency division multiplexing and pre-equalization, and an extended distance over 3 m with a data rate of 0.82 Gbps is also presented. The demonstrated high-speed performance shows that micro-LEDs have great potential in the field of UVC communication.