Lumilens exits stealth with over $900 million to link AI GPUs with light

Lumilens came out of stealth on Aug. 6 disclosing more than $900 million raised to replace the copper links between GPUs in AI data centers with fiber optics.

The total includes a Series C of more than $700 million at a $5.51 billion valuation, co-led by Atreides Management, Bain Capital Ventures, Meritech, Seligman Ventures and Spark Capital, with Qualcomm Ventures and J.P. Morgan Private Capital among more than a dozen other investors, the company said.

Two years after founding, Lumilens said it is already shipping production optical interconnects into a hyperscaler’s live data centers under a multi-billion-dollar customer agreement, though it did not name the customer.

Chief Executive Ankur Singla said the “constraint on AI has shifted from how many GPUs you can buy to how many you can connect.” The pitch reflects a real bottleneck: as training and inference clusters grow, the copper wiring that moves data between chips runs into distance and power limits that optical links are meant to ease.

Lumilens estimates the addressable market for photonic AI interconnects exceeds $100 billion.

The funding, valuation and deployment claims come from Lumilens’s own disclosure and are not independently verified, and the unnamed hyperscaler agreement cannot be confirmed. The $100 billion market figure is a company projection. Optical interconnect has drawn heavy investment before without displacing copper at scale, so shipping into a named customer’s fleet at volume is the test that matters.