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)g...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.展开更多
基金National Key Research and Development Program of China(2022YFB2802803)National Natural Science Foundation of China(61925104,62031011,62274042)+2 种基金Natural Science Foundation of Shanghai Municipality(21ZR1406200)China Mobile Research Institute X-NETJiangsu Provincial Key Research and Development Program(BE2021008-5).
文摘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.
