Ciena Championing Open Ecosystem with Open CPX MSA to Accelerate Widespread CPO Adoption

Ciena USA

Overview

As AI infrastructure scales, the limitations of pluggable optical modules necessitate a transition to Co-Packaged Optics (CPO). An open ecosystem is crucial for widespread CPO adoption, with Open CPX MSA providing the foundational framework. Broadcom continues investing in CPO, demonstrating 36 million hours of uptime in reliability tests with Meta, while Nvidia is deploying early Quantum-X and Spectrum-X CPO switches. Open CPX MSA is driving standardization to support 6.4Tbps throughput with 200Gbps/lane.

In Depth

CPO’s Importance in AI Infrastructure and the Need for an Open Ecosystem

The explosive growth of AI data centers has driven demands for data transfer bandwidth and power efficiency to unprecedented levels. Traditional pluggable optical modules are reaching their limits in terms of physical size, power consumption, and signal integrity, establishing Co-Packaged Optics (CPO) as an inevitable technological trend. However, for widespread adoption and proliferation of CPO, an open ecosystem is essential to ensure interoperability among vendors and diversify the supply chain.

Standardization Driven by Open CPX MSA

Leading industry players, including Ciena and Broadcom, are driving the “Open CPX MSA (Multi-Source Agreement)”—an open standardization initiative aimed at promoting CPO adoption. The Open CPX MSA provides a foundational framework for CPO technical specifications and sets forth the following objectives:

• Ensuring Interoperability: Guarantees connectivity between CPO products from different vendors, reducing the risk of vendor lock-in.
• High Bandwidth and Efficiency: Promotes standardization to support 32 bi-directional channels per module, totaling 6.4Tbps throughput (200Gbps/lane), meeting the demands of AI data centers.
• Implementation Flexibility: Enables the development of a single PCB compatible with both optical and copper connections, reducing design and implementation complexity.

Progress in CPO Reliability Validation and Initial Deployment

The reliability of CPO technology is a critical factor for its widespread adoption. Broadcom continues to invest in CPO technology, with joint reliability tests with Meta demonstrating robust performance over 36 million hours of uptime, proving its resilience. NVIDIA is also progressing with the initial deployment of its Quantum-X and Spectrum-X CPO switches, indicating that CPO is moving into the practical phase. A standardized open ecosystem is expected to reduce the technical complexity and adoption barriers of CPO, while diversifying the supply chain, thereby contributing to CPO cost reduction and supply stability. This will allow data center operators to benefit from CPO’s power efficiency and performance improvements while mitigating vendor lock-in risks.