Data Center Optics Shift as CPO Moves to Commercial Stage; 1.6T Ramp-Up Begins

The narrative for data center optics has shifted from CPO being in a validation phase to a commercial-ready stage, cemented by NVIDIA's 2026 launch plan for its CPO-based Ethernet switch.

Alongside CPO, high-density pluggable optics are evolving, with the 1.6T transition beginning and new standards like xPO and CPX creating a 'co-existence' model rather than a simple replacement.

While the supply of optical modules is expected to improve, a potential mismatch with GPU and switch availability could create temporary inventory and price pressures for 800G products in late 2026.

The recent OFC 2026 conference marked a pivotal moment for the future of data center networking.

The core story has fundamentally shifted. The conversation around Co-Packaged Optics (CPO) is no longer about whether it's a viable technology, but rather how and when it will be deployed. This change from a validation phase to a commercial-ready stage is the most significant takeaway.

First, the primary catalyst for this shift was NVIDIA. The AI chip giant put a firm date on CPO's commercialization by announcing its Spectrum-X Photonics—an Ethernet switch using CPO—for a 2026 release. This single announcement provided a concrete timeline and powerful market validation, effectively ending the debate about CPO's near-term relevance.

Second, a new, more nuanced picture of the future architecture has emerged. It's not a simple case of CPO replacing traditional pluggable optics. Instead, we're seeing the rise of a 'co-existence' model. New standards like Arista's xPO MSA and Ciena's CPX (a 'pluggable CPO') create a bridge between the two worlds. These innovations reduce the risk for data center operators, allowing them to adopt CPO's benefits in power and density more gradually.

Third, while CPO captured headlines, the world of pluggables is rapidly advancing. The industry is officially beginning its transition from the 800G peak to the 1.6T era. Live demonstrations of 1.6T technology and strong market forecasts indicate that the next generation of speed is arriving. This also suggests that the current supply tightness for 800G modules could ease as focus shifts.

Finally, another key technology, Optical Circuit Switching (OCS), is gaining serious traction. Reports indicate that tech giants like Google are adopting OCS in their next-generation AI systems. OCS offers a highly efficient way to manage massive, sustained data flows, complementing the other architectural changes.

In conclusion, the data center is entering a new optical era defined by a multi-technology approach. CPO, advanced 1.6T pluggables, and OCS will work in concert. The key risk to watch is a potential supply chain mismatch. If the production of optical components outpaces that of GPUs and switches, we could see temporary inventory buildup and price pressure for 800G modules in late 2026.

Glossary
CPO (Co-Packaged Optics): A technology that places optical components directly on the same package as a main chip (like a switch or GPU). This shortens the data path, reducing power consumption and increasing speed.
Pluggable Optics: Small, removable modules that plug into network equipment. They convert electrical signals to light signals for transmission over fiber optic cables.
OCS (Optical Circuit Switching): A networking method that creates a dedicated, direct path of light for large, continuous data transfers, avoiding the congestion of traditional networks.

Data Center Optics Shift as CPO Moves to Commercial Stage; 1.6T Ramp-Up Begins

The narrative for data center optics has shifted from CPO being in a validation phase to a commercial-ready stage, cemented by NVIDIA's 2026 launch plan for its CPO-based Ethernet switch.

Alongside CPO, high-density pluggable optics are evolving, with the 1.6T transition beginning and new standards like xPO and CPX creating a 'co-existence' model rather than a simple replacement.

While the supply of optical modules is expected to improve, a potential mismatch with GPU and switch availability could create temporary inventory and price pressures for 800G products in late 2026.

The recent OFC 2026 conference marked a pivotal moment for the future of data center networking.

Glossary
CPO (Co-Packaged Optics): A technology that places optical components directly on the same package as a main chip (like a switch or GPU). This shortens the data path, reducing power consumption and increasing speed.
Pluggable Optics: Small, removable modules that plug into network equipment. They convert electrical signals to light signals for transmission over fiber optic cables.
OCS (Optical Circuit Switching): A networking method that creates a dedicated, direct path of light for large, continuous data transfers, avoiding the congestion of traditional networks.