都在发力CPO

Core Viewpoint - The article discusses the growing interest in Co-Package Optics (CPO) technology as a promising solution for reducing power consumption and increasing bandwidth between server packages, particularly in the context of large-scale server deployments in the AI sector [1]. Group 1: CPO Technology and Industry Trends - CPO technology is gaining attention due to the increasing scale of servers, especially in AI, leading to higher data consumption for communication between servers and packages [1]. - The ISSCC 2025 conference in San Francisco will feature multiple papers related to CPO technology, highlighting its significance in the industry [1]. Group 2: Broadcom's Tomahawk 5 - Bailly - Broadcom introduced the Tomahawk 5 (TH5) - Bailly, which boasts a data rate of 51.2 Tbps and a power efficiency of 6 pJ/b [2]. - The TH5-Bailly has been in mass production since 2023, with samples provided to customers, although widespread market availability has not been specified [2]. Group 3: Intel's Direct-Drive Optical Engine - Intel presented a paper on a direct-drive optical engine utilizing a 0.9 pJ/b energy efficiency at 108 Gb/s using PAM4 modulation, which improves bandwidth and power consumption [4][5]. - The design incorporates 3D-printed polymer waveguides, achieving a 1/4 reduction in footprint and a 1/3 reduction in height compared to previous mechanical optical interfaces [4]. Group 4: MicroLED Technology - Ehsan Afshari from the University of Michigan discussed using MicroLEDs for low-power, high-bandwidth communication, presenting a demonstration chip achieving 1.2 Tbps bandwidth with power consumption below 1 pJ/bit [10][17]. - The focus of this technology is on inter-chip or inter-package communication rather than long-distance communication, emphasizing efficiency [17]. Group 5: Future Outlook - The article notes that while Broadcom and Intel target different markets, they share a common goal of low power and high bandwidth [19]. - NVIDIA is expected to launch its CPO products, Quantum-X Photonics and Spectrum-X, in the second half of 2025, indicating a growing trend towards high-performance computing and low-power technologies in AI [20].