Ayar Labs, which is developing optical interconnect tech to boost speeds on high-performance computer systems, raises $35M Series B
Context & Ripple Effects
Ayar Labs' $35M Series B is the opening move in what becomes one of the clearest optical-interconnect funding arcs on record: within eighteen months the company converts this round into a $130M Series C backed by Nvidia and Intel, and by 2026 it has raised a $500M Series E at a $3.8B valuation on the thesis of replacing copper wiring in semiconductors with fiber optics.
The round also seeded a category, not just a company — Celestial AI, nEye Systems, and AttoTude all later raised nine-figure-plus optical or THz interconnect rounds targeting the same AI and hyperscale data center demand this 2020 raise was first positioned for.
First-order effects
- Ayar Labs gains the capital to push its optical interconnect chips from development toward deployment in high-performance computing systems, where copper wiring is the speed bottleneck.
- The round validates the startup's silicon photonics approach enough to attract the strategic money — Nvidia and Intel — that anchors its next raise.
Second-order effects
- Once Ayar Labs' trajectory proves the market, competitors pile in: Celestial AI raises a $100M Series B for optical interconnect across compute, memory, and transmission, while nEye and AttoTude follow with their own light-based and THz data center interconnect rounds.
- Chipmakers' equity stakes turn interconnect suppliers into strategic assets — Nvidia and Intel gain influence over a technology layer that determines how fast their own accelerators and CPUs can talk to memory and each other.
Third-order effects
- If the pattern holds, data center interconnect becomes a funded vendor category in its own right, with hyperscale buyers choosing between copper incumbency and a new optical supply chain rather than treating wiring as a commodity.
- The escalating round sizes — $35M to $500M in six years — signal that bandwidth between compute nodes, not just the compute itself, is becoming a capital-intensive competitive frontier for AI infrastructure.
The trend: High-performance computing is moving from copper to optical interconnects, and each successive funding round — Ayar Labs' included — shows investors repricing the wires between chips as core AI infrastructure.