15 Mar 2026
Wide and Parallel Wins
Last week, the Optical Compute Interconnect (OCI) Multi-Source Agreement (MSA)
published its v1.0 line interface specification—a 24-page document co-authored by
NVIDIA, Meta, Microsoft, OpenAI, Broadcom, and AMD that defines the optical physical
layer for AI scale-up interconnects. It specifies Dense Wavelength-Division Multiplexing
(DWDM) wavelength channels in the O-band (around 1300 nm) on a single bidirectional
(BiDi) fiber, micro-ring resonators for modulation, and an external laser source
architecture.
