C-LIGHT Outlines High-Speed Interconnect Choices for AI Data Centers: 1.6T OSFP-RHS and Immersion Optics

C-LIGHT China

Overview

C-LIGHT highlights key high-speed interconnect technologies for the AI Data Center Era, specifically mentioning 1.6T/800G/400G/200G optical modules, with a focus on 1.6T OSFP-RHS and liquid immersion transceivers. The company also lists Active Optical Cables (AOC) and Active Electrical Cables (AEC) as important components, all crucial for meeting the escalating bandwidth demands of AI workloads in data centers. These diverse solutions are designed to optimize performance and efficiency across various network tiers in modern AI infrastructure.

In Depth

Background: The Unprecedented Interconnect Demands of AI

The rise of Artificial Intelligence, particularly in areas like large language models and deep learning, has created an unparalleled demand for high-speed, low-latency, and energy-efficient data transfer within data centers. Traditional networking infrastructure is struggling to keep pace with the massive data flow required between GPUs and AI accelerators, leading to bottlenecks in performance and increasing power consumption. C-LIGHT, a prominent provider in optical connectivity, addresses these challenges by outlining a range of critical high-speed interconnect technologies for the ‘AI Data Center Era’.

Key Findings: C-LIGHT’s Portfolio for AI Interconnects

C-LIGHT emphasizes a multi-faceted approach to optical and electrical interconnects, offering solutions tailored for various AI data center requirements:

• High-Speed Optical Modules (1.6T/800G/400G/200G):
  – Tiered Speed Options: C-LIGHT provides optical modules across a spectrum of data rates, from 200G to the cutting-edge 1.6T. This allows data center architects to deploy the most appropriate speed for different network tiers, whether it’s within a rack, between racks, or for data center interconnects (DCI). These modules are fundamental to achieving higher bandwidth density and improving overall network efficiency. – 1.6T OSFP-RHS: Specifically, the 1.6T OSFP-RHS (Octal Small Form-factor Pluggable – Retimed Host Side) is highlighted. This advanced form factor is crucial for ultra-high-speed AI clusters, potentially allowing the host-side SerDes to perform some signal conditioning, thereby reducing the complexity and power consumption of the module itself while delivering high-density, low-latency connectivity. – Liquid Immersion Transceivers: Recognizing the trend towards advanced cooling, C-LIGHT also emphasizes immersion-ready transceivers. These are designed to operate efficiently within liquid immersion cooling environments, enabling higher power dissipation, greater component density, and improved overall thermal management within AI racks.
• Active Optical Cables (AOC) and Active Electrical Cables (AEC):
  – AOCs: These integrate optical transceivers at each end of an optical fiber cable, offering the benefits of fiber optics (lightweight, thin, EMI immunity) with the ease of use of a copper cable for short-to-medium reach connections, widely used for server-to-switch links. – AECs: Active Electrical Cables are copper cables with integrated retimers and equalization circuitry. They extend the reach and increase the speed of copper links beyond passive copper limitations, providing a cost-effective and power-efficient alternative for intra-rack and short-reach inter-rack connections.

Technical Significance & Outlook: Optimizing AI Data Center Performance

The range of high-speed interconnect technologies promoted by C-LIGHT is critical for optimizing the design and operation of AI data centers. By providing diverse options, C-LIGHT empowers data center operators to build highly efficient and cost-effective infrastructures that can meet the dynamic demands of AI workloads:

• Performance Maximization: Ultra-high-speed modules like 1.6T and 800G eliminate bandwidth bottlenecks between GPUs and servers, accelerating AI model training and enabling more complex AI applications.
• Improved Power Efficiency: Technologies such as OSFP-RHS and immersion-ready transceivers, along with AECs, contribute to significant reductions in power consumption, lowering operational costs and environmental impact.
• Flexible Infrastructure Design: A comprehensive portfolio of interconnect options provides flexibility for data center architects to balance performance, cost, and physical layout according to specific AI application needs.

In the AI Data Center Era, these interconnect technologies serve as the foundational backbone for accelerating the AI revolution. C-LIGHT’s focus on a broad spectrum of solutions ensures that future AI infrastructure can continue to evolve, supporting the next wave of intelligent technologies and services.