• Photonics Research
  • Vol. 12, Issue 6, 1186 (2024)
Junfei Wang1, Junhui Hu1,2, Chaowen Guan1, Yuqi Hou1,3..., Zengyi Xu1, Leihao Sun1, Yue Wang4, Yuning Zhou1, Boon S. Ooi4, Jianyang Shi1,2,3, Ziwei Li1,3, Junwen Zhang1,2,3, Nan Chi1,2, Shaohua Yu2 and Chao Shen1,2,3,*|Show fewer author(s)
Author Affiliations
  • 1School of Information Science and Technology, Fudan University, Shanghai 200433, China
  • 2Peng Cheng Laboratory, Shenzhen 518000, China
  • 3ZGC Institute of Ubiquitous-X Innovation and Applications, Beijing 100876, China
  • 4Photonics Laboratory, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
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    DOI: 10.1364/PRJ.516829 Cite this Article Set citation alerts
    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, "High-speed GaN-based laser diode with modulation bandwidth exceeding 5 GHz for 20 Gbps visible light communication," Photonics Res. 12, 1186 (2024) Copy Citation Text show less

    Abstract

    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.
    H(f)=fR2fR2f2+jγf/2π.

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    S21M=S21LR.

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    η=Zr2R(1+S22P)S21PS21M.

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    fR=12π[ΓυgdgdnqVηi(IIth)]1/2.

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    γ=KfR2+γ0,

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    x(t)=k=0N11NP(k)X(k)ej2πNkt,

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    x(t)=F1{F[x(t)]·Hpre},

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    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, "High-speed GaN-based laser diode with modulation bandwidth exceeding 5 GHz for 20 Gbps visible light communication," Photonics Res. 12, 1186 (2024)
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