• Photonics Research
  • Vol. 9, Issue 5, 05000792 (2021)
Lei Wang1、†, Zixian Wei2、3、†, Chien-Ju Chen4、†, Lai Wang1、5、*, H. Y. Fu2、3、6、*, Li Zhang3, Kai-Chia Chen4, Meng-Chyi Wu4、7、*, Yuhan Dong3, Zhibiao Hao1, and Yi Luo1
Author Affiliations
  • 1Beijing National Research Center for Information Science and Technology (BNRist), Department of Electronic Engineering, Tsinghua University, Beijing 100084, China
  • 2Tsinghua-Berkeley Shenzhen Institute (TBSI), Tsinghua University, Shenzhen 518055, China
  • 3Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
  • 4Institute of Electronics Engineering, Taiwan Tsing Hua University, Hsinchu 30013, Taiwan, China
  • 5e-mail: wanglai@tsinghua.edu.cn
  • 6e-mail: hyfu@sz.tsinghua.edu.cn
  • 7e-mail: mcwu@ee.nthu.edu.tw
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    Abstract

    The data rate of a visible light communication (VLC) system is basically determined by the electrical-to-optical (E-O) bandwidth of its light-emitting diode (LED) source. In order to break through the intrinsic limitation of the carrier recombination rate on E-O bandwidth in conventional c-plane LEDs based on InGaN quantum wells, a blue micro-LED with an active region of nano-structured InGaN wetting layer is designed, fabricated, and packaged to realize a high-speed VLC system. The E-O bandwidth of the micro-LED can reach up to 1.3 GHz. Based on this high-speed micro-LED, we demonstrated a data rate of 2 Gbps with a bit error rate (BER) of 1.2×10-3 with simple on-off keying signal for a 3-m real-time VLC. In addition, a 4-Gbps VLC system using quadrature phase shift keying-orthogonal frequency-division multiplexing with a BER of 3.2×10-3 is also achieved for the same scenario. Among all the point-to-point VLC systems based on a single-pixel LED, this work has the highest distance-bandwidth product of 3 GHz·m and the highest distance-rate product of 12 Gbps·m.
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    Lei Wang, Zixian Wei, Chien-Ju Chen, Lai Wang, H. Y. Fu, Li Zhang, Kai-Chia Chen, Meng-Chyi Wu, Yuhan Dong, Zhibiao Hao, Yi Luo. 1.3 GHz E-O bandwidth GaN-based micro-LED for multi-gigabit visible light communication[J]. Photonics Research, 2021, 9(5): 05000792
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    Category: Optoelectronics
    Received: Oct. 5, 2020
    Accepted: Feb. 2, 2021
    Posted: Feb. 2, 2021
    Published Online: May. 7, 2021
    The Author Email: Lai Wang (wanglai@tsinghua.edu.cn), H. Y. Fu (hyfu@sz.tsinghua.edu.cn), Meng-Chyi Wu (mcwu@ee.nthu.edu.tw)