A Glance Of CPO Prospects-- Hot On OFC 2026

                                                    A glance of CPO prospects-- Hot on OFC 2026

In the last two years. the industry has made significant strides of CPO technologies. They are now far more reliable. Looking ahead to the 400G-per-lane SerDes generation, CPO may become the only viable option. At such speeds, even the best PCB traces or flyover cables may introduce too much insertion loss. That's when transitioning to optical signaling within the package itself becomes essential.

What is Co-Packaged Optics?

Co-packaged optics (CPO) is a technology that places optical components, such as lasers and photodetectors, directly alongside electronic components like Application-Specific Integrated Circuits (ASICs) within the same package.

CPO is particularly valuable in AI clusters, high-performance computing, and next-generation data centers, where traditional copper interconnects are reaching their physical limits. It supports high-speed communication for GPU and XPU clusters, enabling efficient training of large language models and other AI workloads.
The final goal of any CPO solution is to achieve high bandwidth density with the lowest power possible. Leading companies like Broadcom, Intel, and IBM have heavily invested in CPO, developing production-ready platforms that integrate silicon photonics with advanced packaging techniques.

Benefits of CPO
1. Power Efficiency: CPO reduces the need for high-power drivers, repeaters, and retimers, lowering energy consumption per bit.
2. High Bandwidth: Direct integration with ASICs enables higher data rates, supporting next-gen AI, HPC, and data-intensive applications.
3. Improved Performance: Signal integrity is enhanced, latency is reduced, and insertion loss is minimized, truly critical!
4. Scalability: CPO allows data centers to connect multiple nodes at high bandwidths, supporting growing processing demands.
5. Optimized System Design: Co-design of optical and electrical components improves reliability, and overall system efficiency.

CPO Deployment Hurdles

Ecosystem Disruption: CPO fundamentally changes the supply chain. Instead of purchasing interchangeable pluggable modules from multiple vendors, customers have to source integrated CPO switches or servers from a single system vendor or a tightly coupled partnership. This reduces sourcing flexibility and increases vendor lock-in.

Operational Complexity: Field replacement and failure management become more complex. A failure in an optical engine might require replacing an entire CPO switch line card or server board rather than just swapping a pluggable module. Developing robust testing, diagnostics, and repair strategies for CPO systems at scale is a major undertaking.

Cost: At present, CPO does not have a significant cost advantage over high-volume pluggable optics. As the volumes pick up, this equation should change.

But, the industry anticipates seeing ever-larger test deployments of CPO to validate the technology and operational models, potentially paving the way for mass deployment in a subsequent generation.