2.805 Gbit/s high-bandwidth phosphor white light visible light communication utilizing an InGaN/GaN semipolar blue micro-LED

Chang, Yun-Han; Huang, Yu-Ming; Liou, Fang-Jyun; Chow, Chi‐Wai; Yang, Liu; Kuo, Hao‐Chung; Yeh, Chien‐Hung; Gunawan, Wahyu Hendra; Hung, Tun-Yao; Jian, Yin-He

doi:10.1364/oe.455312

Cited by 25 publications

(28 citation statements)

References 23 publications

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“…Thus, blue μLEDs exhibit the highest reported modulation bandwidth among all wavelength devices. Currently, c-plane μLEDs have a lower bandwidth than nonpolar or semipolar μLEDs; however, bandwidths greater than 1 GHz can be achieved by structural optimization or growth of microstructures 86,90,95,96 . In addition, the use of QDs as active regions also helps reduce the carrier lifetime of the device 91,93 .…”

Section: Approaches To Increasing the Modulation Bandwidthmentioning

confidence: 99%

High-speed visible light communication based on micro-LED: A technology with wide applications in next generation communication

Lu¹,

Lin²,

Guo³

et al. 2022

OES

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The evolution of next-generation cellular networks is aimed at creating faster, more reliable solutions. Both the next-generation 6G network and the metaverse require high transmission speeds. Visible light communication (VLC) is deemed an important ancillary technology to wireless communication. It has shown potential for a wide range of applications in next-generation communication. Micro light-emitting diodes (μLEDs) are ideal light sources for high-speed VLC, owing to their high modulation bandwidths. In this review, an overview of μLEDs for VLC is presented. Methods to improve the modulation bandwidth are discussed in terms of epitaxy optimization, crystal orientation, and active region structure. Moreover, electroluminescent white LEDs, photoluminescent white LEDs based on phosphor or quantum-dot color conversion, and μLED-based detectors for VLC are introduced. Finally, the latest high-speed VLC applications and the application prospects of VLC in 6G are introduced, including underwater VLC and artificial intelligence-based VLC systems.

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Section: Approaches To Increasing the Modulation Bandwidthmentioning

confidence: 99%

High-speed visible light communication based on micro-LED: A technology with wide applications in next generation communication

Lu¹,

Lin²,

Guo³

et al. 2022

OES

Self Cite

View full text Add to dashboard Cite

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“…1 Recent studies have shown that the new VLC system built by the new VLC light sources laser diodes (LDs) and micro-light emitting diode (micro-LEDs) has achieved a huge breakthrough in communication rates compared to LED, which are both reaching Gbps. 2,3 However, for LDs and micro-LEDs light sources, LED light sources have the advantages of longer communication distances, nonstrict alignment, simple production processes, driver circuits, and low cost, making them widely used in market lighting systems. LED-based VLC systems have the following advantages: 4 (i) combining lighting and communication functions; (ii) resistant to electromagnetic interference; (iii) available unlicensed bandwidth; (iv) less harmful to humans and the environment; and (v) low laying cost.…”

Section: Introductionmentioning

confidence: 99%

“…Visible light communication (VLC) technology is considered a promising complementary technology for wireless communication, which has significant potential for high-speed downlink data transmission in 6G wireless communication systems 1 . Recent studies have shown that the new VLC system built by the new VLC light sources laser diodes (LDs) and micro-light emitting diode (micro-LEDs) has achieved a huge breakthrough in communication rates compared to LED, which are both reaching Gbps 2 , 3 . However, for LDs and micro-LEDs light sources, LED light sources have the advantages of longer communication distances, nonstrict alignment, simple production processes, driver circuits, and low cost, making them widely used in market lighting systems.…”

Section: Introductionmentioning

confidence: 99%

Visible light communication-channel-adaptive digital pre-equalization scheme based on a deep learning model

et al. 2023

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.To meet the anticipated future demand for optical wireless high data rates, our study proposed a deep learning model-based adaptive digital pre-equalization scheme for visible light communication (VLC) channels is proposed to increase the data rate. We established the deep learning model to predict pre-equalization parameter (PEP) which is adaptive for various VLC channels. The proposed system is flexible and adaptive for commercial light emitting diode with different channel conditions. It improves the bandwidth of different VLC channels up to 125 MHz and has been validated on a 250-Mbps testbed. Based on the experimental results, the PEP update time is at most 5.1 s, and the bit error ratio is always <1 × 10 − 6 while using the PEP in the deep learning network. Meanwhile, the predicted and optimal values of the PEP correspond at 250 Mbps, and the maximum error between the predicted and optimal values of the PEP are only 7 for various channel conditions, including optical power, data rate, send distance, and send angle. The adaptive pre-equalization capability of the proposed system would be a universal digital solution for high-speed access in 6G scenarios combined with the VLC spectrum.

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“…With the continuous development in the field of display technology, the nitride-based μ light-emitting diodes (μLEDs) have been evaluated for wide applications, such as the low-power consume wearable devices [1], wide-viewing angle outdoor displaying and televisions [2,3], high-speed wireless visible light communication [4,5], and high-resolution augmented/virtual reality (AR/VR) products [6]. For high pixels per inch (PPI) display, the size of μLED pixel size needs to shrink to below 20 μm.…”

Section: Introductionmentioning

confidence: 99%

Improved electrical properties of micro light-emitting diode displays by ion implantation technology

et al. 2023

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Generally, the inductively coupled plasma-reactive ion etching (ICP-RIE) mesa technology was used to remove p-GaN/MQWs and expose n-GaN for electrical contact in a fabricated micro light-emitting diode (μLED). In this process, the exposed sidewalls were significantly damaged which result in small-sized μLED presenting a strong size-dependent influence. Lower emission intensity was observed in the μLED chip, which can be attributed to the effect of sidewall defect during etch processing. To reduce the non-radiative recombination, the ion implantation using an As+ source to substitute the ICP-RIE mesa process was introduced in this study. The ion implantation technology was used to isolate each chip to achieve the mesa process in the μLED fabrication. Finally, the As+ implant energy was optimized at 40 keV, which exhibited excellent current–voltage characteristics, including low forward voltage (3.2 V @1 mA) and low leakage current (10–9 A@− 5 V) of InGaN blue μLEDs. The gradual multi-energy implantation process from 10 to 40 keV can further improve the electrical properties (3.1 V @1 mA) of μLEDs, and the leakage current was also maintained at 10–9 A@− 5 V.

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2.805 Gbit/s high-bandwidth phosphor white light visible light communication utilizing an InGaN/GaN semipolar blue micro-LED

Cited by 25 publications

References 23 publications

High-speed visible light communication based on micro-LED: A technology with wide applications in next generation communication

High-speed visible light communication based on micro-LED: A technology with wide applications in next generation communication

Visible light communication-channel-adaptive digital pre-equalization scheme based on a deep learning model

Improved electrical properties of micro light-emitting diode displays by ion implantation technology

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