The Sian 2 features 200G/lane electrical and optical interfaces to augment the Sian DSP that supports 100 Gbps electrical and 200Gbps optical interfaces. Sian and Sian 2 DSPs enable pluggable modules with 200G/lane interfaces that are foundational to connect next generation AI clusters.
AI cluster sizes and cluster performance needs are growing rapidly to support exploding AI model sizes and high performance, low latency, and resilient connectivity are vital for the scale-up and scale-out of next generation AI clusters. For these networks, customers demand reliable optical network connectivity with higher bandwidth, lower power, lower latency and lower cost.
This has necessitated the migration from the 400G/800G links with 100G/lane optics being used in AI clusters today to 800G/1.6T links with 200G/lane optics that Sian 2 enables.
Broadcom’s DSPs are optimised for 800G and 1.6T optical module platforms and deliver improved levels of performance by doubling the bandwidth with lower power, lower latency and lower cost per bit to facilitate AI data centre scale.
“200G/lane DSP is foundational to high-speed optical links for next generation scale-up and scale-out networks in the AI infrastructure,” said Vijay Janapaty, vice president and general manager of the Physical Layer Products Division at Broadcom. “The Sian family of products reinforces Broadcom’s leadership in optical DSP PHYs and enables our AI data centre customers to deploy high-performance 800G and 1.6T links.”
In addition, the combination of Sian 2 and Sian PHY and Broadcom’s 200G/lane optics, including electro-absorption modulated laser (EML) and continuous wave laser (CWL), provides the best-in-class performance and power consumption enabling data centre operators to cost-effectively scale AI workloads.
“AI market leaders will start ramping optical modules using 200G/lane in 2025,” commented Dr. Vlad Kozlov, CEO and Chief Analyst at LightCounting. “There is a race for dominance in AI fuelling a demand for delivery in excess of 1M units of 1.6T optical transceivers within the first 12 months. We have never seen new products ramping at such rate.”
