Ayar Labs, which is developing a way to link AI chips directly with optical connections, raised a $150M extension to its $500M Series E announced in March 2026
Context & Ripple Effects
Ayar Labs has pursued optical interconnects for high-performance computing since its $35M Series B in 2020, then added a $130M Series C in 2022 backed by Nvidia, Intel and others. Its March 2026 Series E, led by Neuberger Berman at a $3.8B valuation, marked a much larger financing phase aimed at replacing chip-level copper wiring with optical links.
The added $150M brings Ayar's 2026 financing to $650M, giving its optical-link approach a deeper capital base as AI systems require connections among more chips.
First-order effects
- Ayar Labs gains an additional $150M to advance and scale optical connections that directly link AI chips, on top of the $500M raised in March.
- The extension reinforces Ayar's position with a $650M 2026 funding pool for an interconnect technology that targets the links between AI chips.
Second-order effects
- Celestial AI, which raised a $175M Series C in 2024 for optical links between processors and memory, faces a better-funded rival in the race to supply optical connectivity for high-performance systems.
- AI-chip and system builders evaluating optical interconnects gain a more heavily financed prospective supplier, increasing competitive pressure around the transition away from copper links.
Third-order effects
- If late-stage funding continues to concentrate around optical interconnect suppliers, AI infrastructure spending will extend beyond processors and memory into the connections that bind chip clusters together.
- The financing points to AI infrastructure becoming a broader component-stack market, where interconnect vendors need capital not only for chip development but also for deployment at system scale.
The trend: AI infrastructure investment is broadening from compute chips toward the optical interconnects needed to link larger AI systems.