High-speed GaN-based laser diode with modulation bandwidth exceeding 5 GHz for 20 Gbps visible light communication  

作　　者：JUNFEI WANG JUNHUI HU CHAOWEN GUAN YUQI HOU ZENGYI XU LEIHAO SUN YUE WANG YUNING ZHOU BOON S.OOI JIANYANG SHI ZIWEI LI JUNWEN ZHANG NAN CHI SHAOHUA YU CHAO SHEN 

机构地区：[1]School of Information Science and Technology,Fudan University,Shanghai 200433,China [2]Peng Cheng Laboratory,Shenzhen 518000,China [3]ZGC Institute of Ubiquitous-X Innovation and Applications,Beijing 100876,China [4]Photonics Laboratory,King Abdullah University of Science and Technology(KAUST),Thuwal 23955-6900,Saudi Arabia

出　　处：《Photonics Research》2024年第6期1186-1193,共8页光子学研究（英文版）

基　　金：National Key Research and Development Program of China(2022YFB2802803);National Natural Science Foundation of China(61925104,62031011,62274042);Natural Science Foundation of Shanghai Municipality(21ZR1406200);China Mobile Research Institute X-NET;Jiangsu Provincial Key Research and Development Program(BE2021008-5).

摘　　要：Visible light communication(VLC)based on laser diodes demonstrates great potential for high data rate maritime,terrestrial,and aerial wireless data links.Here,we design and fabricate high-speed blue laser diodes(LDs)grown on c-plane gallium nitride(GaN)substrate.This was achieved through active region design and miniaturization toward a narrow ridge waveguide,short cavity length,and single longitudinal mode Fabry–Perot laser diode.The fabricated mini-LD has a low threshold current of 31 mA and slope efficiency of 1.02 W/A.A record modulation bandwidth of 5.9 GHz(−3dB)was measured from the mini-LD.Using the developed mini-LD as a transmitter,the VLC link exhibits a high data transmission rate of 20.06 Gbps adopting the bit and power loading discrete multitone(DMT)modulation technique.The corresponding bit error rate is 0.003,satisfying the forward error correction standard.The demonstrated GaN-based mini-LD has significantly enhanced data transmission rates,paving the path for energy-efficient VLC systems and integrated photonics in the visible regime.

关 键 词：communication DIODE WAVEGUIDE 

分 类 号：TN929.1[电子电信—通信与信息系统] TN312[电子电信—信息与通信工程]