Gbps Long-Distance Real-Time Visible Light Communications Using a High-Bandwidth GaN-Based Micro-LED

Liu, Xiaoyan; Tian, Pengfei; Wei, Zixian; Yi, Suyu; Huang, Yuxin; Zhou, Xiaolin; Qiu, Zhijun; Hu, Laigui; Fang, Zhaoxi; Cong, Chunxiao; Zheng, Lirong; Liu, Ran

doi:10.1109/jphot.2017.2775648

Cited by 44 publications

(30 citation statements)

References 27 publications

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“…For the sake of achieving high-resolution display and high-speed visible light communication, the size of each pixel in micro-LEDs should be as small as possible [23]. In this work, the micro-LEDs array with four different pixel sizes were designed and manufactured.…”

Section: Resultsmentioning

confidence: 99%

High-Performance Semi-Polar InGaN/GaN Green Micro Light-Emitting Diodes

Zheng

Zhang

et al. 2020

IEEE Photonics J.

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Semi-polar micro-LEDs have gain increasing interests due to the advantages of polarization control and quantum efficiency improvement. In this work, a novel semi-polar (20-21)-plane micro-LEDs array has been designed and manufactured. In comparison with c-plane micro-LEDs, semi-polar micro-LEDs indicate better electrical and optical performance. The relative EQE of semi-polar micro-LEDs remains at 62% under the injected current density of 775.6 A/cm 2 , which indicates a reduced efficiency droop due to less polarization in MQWs. It has been further proved by a significant reduction of 55% in emission peak blue-shift under the injected current density from 11.1 A/cm 2 to 775.6 A/cm 2. In addition, the carrier recombination dynamics and spatial light distribution of semi-polar micro-LEDs with different pixel sizes have been studied. Fast recombination lifetime in smaller size semi-polar micro-LEDs indicates a promising way to be used as a high modulation bandwidth light source. Stable and uniform light distribution in a wider range of spatial azimuths further supports for the semi-polar micro-LEDs as a strong candidate for the applications of high-resolution display and high-speed visible light communication.

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Section: Resultsmentioning

confidence: 99%

High-Performance Semi-Polar InGaN/GaN Green Micro Light-Emitting Diodes

Zheng

Zhang

et al. 2020

IEEE Photonics J.

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“…The impact of LiFi technology on each of the various apps is reflected in high data transfer rates. LiFi technology has transmission capabilities much greater than 1Gbps [18], with current transmission rates of ~300Mbps. In addition, LiFi technology is more secure for citations and does not cause electro-magnetic interference to EMC.…”

Section: Discussionmentioning

confidence: 99%

Which LiFi's apps may fit mostly to 5G and beyond-5G Technology?

Albert¹,

Dekel²,

Kurland³

et al. 2019

2019 Global LIFI Congress (GLC)

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LiFi technologies are expected to be an integrated part of future broadband wireless technologies. However, it is still not fully clear which apps will fit and benefit future 5G and beyond-5G. The purpose of this paper is to retrieve through Analytic Hierarchy Process model (AHP) and qualitative analysis the most promising apps. Apps for homes, supermarket, museum, communication between vehicles, in-flight entertainment and hospitals were considered. Relevant criteria include latency, data security, data-rate per square-meter, number of customers in square meter and acceptance. The results indicate that acceptance criteria found to be most dominant and hospital driven 5G apps most promising.

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“…When using this proposed device for VLC, it can transmit same signal to different locations, which means two users at different locations can be broadcast, simultaneously. This design outperforms the traditional single-pixel micro-LED-based point-to-point VLC system [15,16,20,22]. The schematic diagram of the experimental system is shown in Fig.…”

Section: Devices and Vlc System Setup 21 Fabrication And Packaging Designmentioning

confidence: 99%

“…However, the low modulation bandwidth of LED limits the data rate of real-time VLC systems. To increase the bandwidth of systems, micro-LEDs have been adopted in real-time VLC systems, where the Gbps long-distance transmission was accomplished through free space in [15] and hundreds of Mbits/s underwater transmission was demonstrated in [16]. But these studies did not provide the modulation and demodulation schemes for real-time video transmission, and most research works focused on point-to-point transmission without considering the user number.…”

Section: Introductionmentioning

confidence: 99%

Real-Time Multi-User Video Optical Wireless Transmission Based on a Parallel Micro-LEDs Bulb

et al. 2021

Self Cite

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In this work, we experimentally achieved a real-time video optical wireless transmission which can broadcast two users in different positions, simultaneously. Firstly, a single-pixel 50-μm micro-LED is designed and fabricated on a GaN-based wafer and then two micro-LED chips are connected as parallel form in a single bulb. The transceiver based on two FPGA boards is used to generate quadrature amplitude modulation-orthogonal frequency division multiplexed (QAM-OFDM) signals and measure the communication performance of the VLC system. The low-power micro-LEDs bulb emits 0.8 mW optical power through two optical paths at 20 mA driving current, and the modulation bandwidths for two users' access are 90 MHz and 73 MHz, respectively. In this two-user real-time video transmission system, the total data rate exceeds 105.54 Mbps without naked eye discernable distortion over 2-m free-space distance. Different from traditional point-to-point links, this work demonstrates the possibility of flexible high-speed multi-user real-time video optical wireless transmission based on a parallel micro-LEDs bulb.

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Gbps Long-Distance Real-Time Visible Light Communications Using a High-Bandwidth GaN-Based Micro-LED

Cited by 44 publications

References 27 publications

High-Performance Semi-Polar InGaN/GaN Green Micro Light-Emitting Diodes

High-Performance Semi-Polar InGaN/GaN Green Micro Light-Emitting Diodes

Which LiFi's apps may fit mostly to 5G and beyond-5G Technology?

Real-Time Multi-User Video Optical Wireless Transmission Based on a Parallel Micro-LEDs Bulb

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