Hon Hai joins hands with research team to successfully break through multi-wavelength μ-LED technology

The research team of Hon Hai Research Institute Semiconductor Research Institute, a subsidiary of Hon Hai, and the research team of National Taiwan University in China and King Abdullah University of Science and Technology in Saudi Arabia, successfully broke through the multi-wavelength μ-LED technology to achieve high-speed visible light communication and inter-chip optical interconnection.

This breakthrough result "Red/Yellow/Green/Blue-Micro-LEDs Mixed White-Light for Wavelength Division Multiplexing Communication" has been accepted for publication by the top international optoelectronic 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 future commercialization of optical communications.

As the demand for high-performance computing, artificial intelligence (AI) and data centers grows, traditional electronic interconnection technology faces bottlenecks in terms of bandwidth, power consumption and latency. GaN-based micro-light-emitting diodes (μ-LEDs) have become an ideal solution for visible light communications (VLC), chip-to-chip optical interconnection and silicon photonic co-package optics (CPO) due to their high brightness, low power consumption and high-speed switching characteristics. μ-LEDs suitable for ultra-high resolution High-efficiency displays, smart wearables, high-speed optical communications and heterogeneous integrated chips. At the 2025 American Optical Fiber Communications Exhibition (OFC), the application of μ-LEDs in chip optical interconnections has attracted much attention and is expected to become a key technology for the next generation of high-efficiency computing and optical communications.

Director Guo Haozhong, director of the Semiconductor Institute of Hon Hai Research Institute (HHRI) and chair professor of Yangming Jiaotong University, together with Dr. Hong Yuheng, researcher Miao Wenqian, researcher Xiao Fufu, intern Li Ziyi and the research team of the Institute of Semiconductor, joined hands with the research team of Distinguished Professor Christine Lin of National Taiwan University (NTU), and Kazuhiro of King Abdullah University of Science and Technology (KAUST) in Saudi Arabia Professor Ohkawa's team jointly researched and successfully developed a high-efficiency red-yellow-green-blue μ-LEDs multi-wavelength visible light communication system.

(a) Color gamut diagram of RYGB μ-LEDs; (b) Experimental configuration diagram of short-distance free space light transmission system. Image source: Hon Hai

Schematic diagram of RYGB μ-LEDs used in wavelength division multiplexing optical communication system. Image source: Hon Hai

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