OFC 2026 Series
OFC 2026 Deep Dive: The Optical Interconnect Revolution in the AI Era
701 papers. 6 deep-dive articles. From optical switching to CPO packaging, materials war to AI-driven operations — OFC 2026 marks the inflection point where optical networking becomes AI infrastructure.
AI Cluster Optical Interconnect Layers
SVG · scale-up / scale-out / scale-across
Three layers: intra-chassis (Scale-Up), inter-rack (Scale-Out), cross-DC (Scale-Across) — each with distinct latency, bandwidth, and power requirements.
AI Clusters Are Rewriting the Foundation of Optical Networking
Series overview. The optical networking narrative shifts from "bandwidth carrier" to "AI system architecture." Three mainlines: optical switching, CPO packaging, materials war.
Optical Circuit Switches Are Becoming the Nervous System of GPU Clusters
OCS reconfiguration drops below 2μs, enabling AI training phase coupling. O/E hybrid cuts AllReduce by 50.3%. 600km cross-DC LLaMA2-70B training demonstrated.
CPO Enters Engineering Deep Waters: The "Last Centimeter" Battle
CPO's real challenges: external laser power, glass substrate coupling yield, and thermal management. Photonic Chiplets targeting 204.8 Tb/s.
400G/lane Materials War: Silicon, TFLN, or BTO — Who Wins?
TFLN driver-less operation (~1V drives 1.2Tbps). BTO monolithically integrated for 1.6T net. Scene-based coexistence, not winner-takes-all.
Hollow-Core Fiber: Faster Than You Think (By More Than a Little)
HCF propagates light in air, cutting latency 31-47% vs SMF. Loss record refreshed to 0.11 dB/km. Real demand from AI cross-cluster training and HFT.
When AI Manages Optical Networks: Optics GPT and Self-Healing Infrastructure
Optics GPT: first vertically pre-trained model for optical networking. Baidu production data validates AI ops at F1=0.894. Networks shift from rule-based to model-based.