Broadcom, Tencent, partner for first 25.6-Tbps CPO switch

Created September 5, 2022
News and Business

Chip and software  manufacturer Broadcom and Tencent Holdings have announced a strategic partnership to accelerate the adoption of high bandwidth CPO network switches for cloud infrastructure. Under this partnership, Broadcom will provide the 25.6-Tbps Humboldt CPO switch device that features Broadcom’s StrataXGS® Tomahawk® 4 switch chip directly coupled and co-packaged with four 3.2-Tbps Silicon Photonics Chiplets In Package (SCIP) optical engines. Tencent has defined the system architecture and worked closely with Broadcom to develop hardware and software for field deployment of the 25.6-Tbps CPO switch system. Ruijie Networks Co., Ltd. will verify the design, manufacture and test the full CPO switch system and provide the finished product to Tencent. The jointly developed 25.6-Tbps CPO switch system will be demonstrated at the China International Optoelectronic Exposition (CIOE) in Shenzhen from September 7th to 9th.

Utilising Broadcom’s leading-edge uncooled continuous wave (CW) laser at 1310 nm for silicon photonics, the 25.6-Tbps CPO switch features:

  • 2RU system design with high efficiency air cooling to support 4×3.2-Tbps optical CPO interfaces routed to 16 MPO connectors and 32x400G electrical QSFP112 ports
  • CPO engine to front-panel routing supports both traditional fibre and flexible printed fibre (FPF) solutions
  • System design compatible to support multiple remote laser modules (RLM)
  • More than 50% optical interconnect power consumption savings compared to standard pluggable optics solutions
  • Production ready for data centre deployment

Broadcom says the slowing of Moore’s Law coupled with the limitations of copper interconnect at high data rates has prompted the industry to rethink the architecture and deployment of high bandwidth network switches. Furthermore, next generation cloud infrastructure deployments require lower optics cost per bit and power consumption. Broad adoption of CPO solutions is critical to sustaining the rapid growth of bandwidth inside the data centre driven by AI/ML, HPC, and networking workloads.

“We are pleased to announce our strategic partnership with Tencent as we enable the industry’s first 25.6-Tbps CPO system for hyperscale data centre field deployment,” said Near Margalit, vice president and general manager, Optical Systems Division, Broadcom. “We expect to continue to innovate and extend our market leadership position with Tencent as we migrate to 51.2-Tbps switch CPOs and next generation 200G/lane PAM-4 applications.”

“Customer demands for higher bandwidth have pushed Tencent to perpetually scale our network,” said Sage Zou, vice president of Tencent Cloud. “We are glad to partner with Broadcom on CPO based technology, which will bring not only higher bandwidth for applications such as AI/ML and HPC, but also it could address the power constraints from the acceleration of growth in new workloads.”

“Addressing the general trend towards chip-scale optical interconnects versus traditional copper-based implementation, CPO technology combines microelectronics and optoelectronics on silicon-based platforms, which can carry more information and transmit longer distances,” said Liu Zhongdong, president and CEO, Ruijie Networks. “CPO switching networks have the advantages of high bandwidth and low power consumption, and Ruijie is glad to participate in the innovation and implementation of this new technology with Tencent & Broadcom.”

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This article was written
by Peter Dykes

Peter Dykes is a independent telecoms and technology journalist who has over that last 30 years written for a wide range of B2B publications and companies. A former BT engineer, he specialises in networks and associated support systems. He is currently Editor of Optical Connections.