02/26/2025, 11:28 AM UTC
基于GaN微LED阵列的芯片间短距光互连Avicena: Chip-to-Chip Short-Distance Optical Interconnect Based on GaN MicroLED Arrays
➀ 随着信息技术的快速发展，芯片间的通信需求日益增长，传统电子互连技术在满足高带宽、低延迟和低功耗需求时面临局限。
➁ Avicena提出，芯片间短距离通信更像是走路，关注简单和效率，而不是使用长距离激光通信技术，这被认为是过度使用。
➂ 微LED技术具有高亮度、高效率、低功耗、高密度并行通信、低功耗、高可靠性、低成本等优势。
➃ 研究团队设计了使用微LED阵列的光发射机，并优化了μLED的驱动电流和调制速率以实现高速数据传输。
➄ 光接收机设计包括使用蓝光光电探测器、优化的跨阻放大器和数字移抵消技术。
➅ 团队在130nm CMOS SOI工艺下实现了2Gbps的传输速率，总功耗为0.5pJ/bit，在16nm工艺下实现了1.2Tbps的总速率和低于1pJ/bit的能量效率。
➆ μLED技术在芯片间通信中的应用展示了其在高性能计算和人工智能领域的巨大潜力。
➀ Chip-to-chip communication needs are increasing with the rapid development of information technology, and traditional electronic interconnect technologies are facing limitations in meeting high bandwidth, low latency, and low power consumption requirements.
➁ Avicena proposes that short-distance chip-to-chip communication is more like walking, focusing on simplicity and efficiency, rather than using long-distance laser communication technology which is considered as overkill.
➂ μLED technology offers advantages such as high brightness, efficiency, low power consumption, high density parallel communication, low power consumption, high reliability, and low cost.
➃ The research team designed an optical transmitter using μLED arrays and optimized the drive current and modulation rate of μLEDs for high-speed data transmission.
➄ The optical receiver design includes the use of blue light photodetectors, optimized transimpedance amplifiers, and digital offset cancellation techniques.
➅ The team achieved a 2Gbps transmission rate with a total power consumption of 0.5pJ/bit in a 130nm CMOS SOI process, and a 1.2Tbps total rate with energy efficiency less than 1pJ/bit in a 16nm process.
➆ The application of μLED technology in chip-to-chip communication shows great potential for high-performance computing and artificial intelligence.
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