OIF (Optical Internetworking Forum)

Type: Standards Body (Optical Networking and Photonic Interconnects)

The Optical Internetworking Forum is the industry consortium that defines multi-vendor interoperability standards for optical networking and co-packaged optics. OIF standards are adoption multipliers: without them, each vendor's CPO solution is proprietary, fragmenting the market and slowing volume deployment. With them, module vendors, ASIC vendors, and system integrators can build on a common spec.

The 3.2T Co-Packaged Module Implementation Agreement (2023) is OIF's first CPO standard and the one that establishes the baseline for the current deployment wave. It specifies 3.2 Tb/s per module, 8×400G optical interfaces, 32×CEI-112G-XSR host interfaces, backward compatibility with 50G lanes, and a ~20×20 mm² module footprint. The 51.2 Tb/s aggregate switch bandwidth this enables matches the requirement of next-generation AI networking switches.

Key Standards

• 3.2T Co-Packaged Module IA (2023) — First industry CPO standard
  • 3.2 Tb/s per module; 8×400Gb/s optical interfaces (FR4, DR4)
  • 32×CEI-112G-XSR host interface; backward compatible CEI-56G-XSR
  • 51.2 Tb/s aggregate switch bandwidth
  • ~140G/mm bandwidth edge density; ~20×20 mm² footprint
  • Power: 32W per module (10 pJ/bit at 3.2 Tb/s); 8W/cm² thermal density

Market Context

• CPO port deployments projected: >10 million units by 2029 (OIF 3.2T)
• Photonic IC + laser market: $2.4B (2023) → $5.9B (2029) (OIF 3.2T)
• Future roadmap: 6.4T and 12.8T generations follow 3.2T

Mentioned In

• Co-Packaged Optics — Standardization layer enabling multi-vendor CPO adoption
• Photonic Interconnects — Market projection context

Related Entities

• Ayar Labs — UCIe optical chiplet aligned with OIF CPO standards
• TSMC (Photonics Division) — COUPE platform implementing OIF-compatible interfaces