Hon Hai Research Institute Partners with Taiwan Academic Research Institute and KAUST to Participate in CLEO 2025

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The research team of the Semiconductor Division of Hon Hai Research Institute, together with the research teams of National Taiwan University and King Abdullah University of Science and Technology in Saudi Arabia, has successfully made breakthroughs in multi-wavelength μ -LED technology to achieve high-speed visible light communication and optical interconnection between chips. This breakthrough result, " Red/Yellow/Green/Blue-Micro-LEDs Mixed White-Light for Wavelength Division Multiplexing Communication ", has been accepted for publication at the world's top optoelectronics conference CLEO 2025 (Conference on Lasers and Electro-Optics) . This technological breakthrough not only lays the foundation for high-speed VLC , inter-chip optical interconnection and silicon photonic CPO applications, but also opens up a new path for the future commercialization of optical communications.

As the demand for high-performance computing, artificial intelligence ( AI ) and data centers grows, traditional electronic interconnect technologies face bottlenecks in bandwidth, power consumption and latency. GaN -based micro-light-emitting diodes (μ -LEDs ) are ideal for visible light communications ( VLC ), chip-to-chip optical interconnects and silicon photonics co-packaged optics ( CPO ) due to their high brightness, low power consumption and high-speed switching characteristics . μ -LEDs are suitable for ultra-high resolution displays, smart wearables, high-speed optical communications and heterogeneous integrated chips. At the 2025 Optical Fiber Communications ( OFC ) exhibition in the United States, the application of μ -LEDs in chip optical interconnection attracted much attention and is expected to become a key technology for the next generation of high-performance computing and optical communications.

Director of the Semiconductor Institute of Hon Hai Research Institute (HHRI) and Yang Ming Chiao Tung University Chair Professor Guo Haozhong, together with Dr. Hong Yuheng, Researcher Miao Wenxi, Researcher Xiao Fuhe, intern Li Ziyi and the research team of the Semiconductor Institute, in collaboration with the research team of Distinguished Professor Lin Gongru of National Taiwan University (NTU) and the team of Professor Kazuhiro Ohkawa of King Abdullah University of Science and Technology (KAUST) in Saudi Arabia , successfully developed a high-efficiency red - yellow - green - blue μ -LEDs multi-wavelength visible light communication system.

The study used semi-polarized epitaxy technology to produce blue and green μ -LEDs , and designed stress release layers for yellow and red μ -LEDs to reduce the quantum confined Stark effect ( QCSE ). Component performance is optimized through mesa design, C -type electrodes, atomic layer deposition ( ALD ) passivation and distributed Bragg reflectors ( DBR ). Blue μ -LEDs use DMT modulation technology to achieve a transmission rate of 7.12 Gbit/s , green light reaches 5.36 Gbit/s , and yellow and red μ -LEDs use QAM-OFDM technology to reach 3 Gbit/s and 2.25 Gbit/s respectively , all meeting the forward error correction ( FEC ) limit of 3.8×10 ⁻ ³ . In the short-distance free-space optical transmission test, RYGB μ -LEDs demonstrated excellent color and data transmission performance, and the color gamut diagram also showed its potential in display applications.

In chip-to-chip optical interconnection and silicon photonic CPO applications, μ -LEDs are integrated with silicon photonic chips to provide high-bandwidth, low-power optical interconnection, thereby improving data center data throughput. Combined with wavelength division multiplexing ( WDM ) technology, μ -LEDs support multi-channel parallel transmission, enhance transmission capacity, and provide an efficient solution for the next generation of communications. This technology can lay the foundation for high-speed VLC , inter-chip optical interconnection and silicon photonic CPO , promote the application of μ -LEDs in high-performance computing and communication networks, and promote the commercialization of optical communications.