High-speed visible light communication systems based on Si-substrate LEDs with multiple superlattice interlayers

Fangchen Hu; Shouqing Chen; Yuyi Zhang; Guoqiang Li; Peng Zou; Junwen Zhang; Chao Shen; Xiaolei Zhang; Jian Hu; Jianli Zhang; Zhixue He; Shaohua Yu; Fengyi Jiang; Nan Chi

doi:10.1186/s43074-021-00039-9

High-speed visible light communication systems based on Si-substrate LEDs with multiple superlattice interlayers

doi: 10.1186/s43074-021-00039-9

基金项目:

This work was partially supported by the NSFC project (No.61925104, No.62031011), Peng Cheng Laboratory project (No.PCL2021A14) and Fudan University-CIOMP Joint Fund.

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出版历程
- 收稿日期: 2021-04-29
- 录用日期: 2021-07-22
- 网络出版日期: 2021-08-09

High-speed visible light communication systems based on Si-substrate LEDs with multiple superlattice interlayers

1.
Key Laboratory for Information Science of Electromagnetic Waves (MoE), Fudan University, Shanghai, 200433, People’s Republic of China
2.
National Institute of LED on Silicon Substrate, Nanchang University, Nanchang, 330096, People’s Republic of China
3.
State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai, 200241, People’s Republic of China
4.
State Key Laboratory of Optical Communication Technologies and Networks, China Information Communication Technologies Group Corporation, Wuhan, 430000, People’s Republic of China
5.
Peng Cheng Laboratory, Shenzhen, 518055, China

Funds:

This work was partially supported by the NSFC project (No.61925104, No.62031011), Peng Cheng Laboratory project (No.PCL2021A14) and Fudan University-CIOMP Joint Fund.

摘要

摘要: High-speed visible light communication (VLC), as a cutting-edge supplementary solution in 6G to traditional radio-frequency communication, is expected to address the tension between continuously increased demand of capacity and currently limited supply of radio-frequency spectrum resource. The main driver behind the high-speed VLC is the presence of light emitting diode (LED) which not only offers energy-efficient lighting, but also provides a cost-efficient alternative to the VLC transmitter with superior modulation potential. Particularly, the InGaN/GaN LED grown on Si substrate is a promising VLC transmitter to simultaneously realize effective communication and illumination by virtue of beyond 10-Gbps communication capacity and Watt-level output optical power. In previous parameter optimization of Si-substrate LED, the superlattice interlayer (SL), especially its period number, is reported to be the key factor to improve the lighting performance by enhancing the wall-plug efficiency, but few efforts were made to investigate the influence of SLs on VLC performance. Therefore, to optimize the VLC performance of Si-substrate LEDs, we for the first time investigated the impact of the SL period number on VLC system through experiments and theoretical derivation. The results show that more SL period number is related to higher signal-to-noise ratio (SNR) via improving the wall-plug efficiency. In addition, by using Levin-Campello bit and power loading technology, we achieved a record-breaking data rate of 3.37 Gbps over 1.2-m free-space VLC link under given optimal SL period number, which, to the best of our knowledge, is the highest data rate for a Si-substrate LED-based VLC system.
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Abstract: High-speed visible light communication (VLC), as a cutting-edge supplementary solution in 6G to traditional radio-frequency communication, is expected to address the tension between continuously increased demand of capacity and currently limited supply of radio-frequency spectrum resource. The main driver behind the high-speed VLC is the presence of light emitting diode (LED) which not only offers energy-efficient lighting, but also provides a cost-efficient alternative to the VLC transmitter with superior modulation potential. Particularly, the InGaN/GaN LED grown on Si substrate is a promising VLC transmitter to simultaneously realize effective communication and illumination by virtue of beyond 10-Gbps communication capacity and Watt-level output optical power. In previous parameter optimization of Si-substrate LED, the superlattice interlayer (SL), especially its period number, is reported to be the key factor to improve the lighting performance by enhancing the wall-plug efficiency, but few efforts were made to investigate the influence of SLs on VLC performance. Therefore, to optimize the VLC performance of Si-substrate LEDs, we for the first time investigated the impact of the SL period number on VLC system through experiments and theoretical derivation. The results show that more SL period number is related to higher signal-to-noise ratio (SNR) via improving the wall-plug efficiency. In addition, by using Levin-Campello bit and power loading technology, we achieved a record-breaking data rate of 3.37 Gbps over 1.2-m free-space VLC link under given optimal SL period number, which, to the best of our knowledge, is the highest data rate for a Si-substrate LED-based VLC system.
- Visible light communication /
- InGaN/GaN LEDs design /
- Silicon photonics /
- Superlattice interlayers /
- 6G

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参考文献(34)

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High-speed visible light communication systems based on Si-substrate LEDs with multiple superlattice interlayers

doi: 10.1186/s43074-021-00039-9

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High-speed visible light communication systems based on Si-substrate LEDs with multiple superlattice interlayers

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