Optical modules —including SFP, QSFP, and CWDM series —serve as the core components enabling this high-speed, high-bandwidth, and long-distance connectivity. Without them, even the most powerful GPU clusters would be bottlenecked by network limitations. The short-distance optical return loss positioning technology enables precise and efficient identification of contaminated or loose optical modules. Efficient node-to-node communication is crucial, as data must flow seamlessly between GPUs to maximize computational. XPO represents a new class of optical pluggable module designed specifically for next-generation AI data center fabrics. 8Tbps of bandwidth using 64 electrical lanes and incorporates an integrated liquid-cooled cold plate capable of supporting 400W+ module power. Training large language models like GPT-4, Claude, or Llama with hundreds of billions of parameters demands that thousands of GPUs work in perfect synchronization, exchanging gradients, activations, and model parameters.
Read More
