Ayar Labs — AI supply-chain exposure

Ayar Labs builds optical input-output — the technology for moving data in and out of a chip using light instead of electrical wires. Its TeraPHY optical chiplets and SuperNova light sources are designed to sit inside the same package as an AI accelerator, replacing copper links that are running out of bandwidth as models scale. This is the co-packaged-optics frontier, and its investor roster — Nvidia, AMD and Intel — signals that the largest chip firms see it as strategic.

The structural hook is a looming bottleneck. As accelerators are lashed together in ever-larger clusters, the interconnect between them becomes the limit, and electrical signalling can only reach so far before power and distance bite. If co-packaged optics becomes standard, in-package optical I/O moves from exotic to essential. The model weights Ayar lightly as an early producer — foundational technology, not yet a shipping-at-scale business.