Quintessent, an innovator in resilient and low-cost AI datacenter optical interconnect products, announced it has raised $40 million in an oversubscribed Series A investment round. Quintessent also announced the start of customer sampling of its single-chip quantum dot-based DWDM comb laser - a new class of light source designed to simplify optical connectivity for rapidly scaling AI clusters.

The Series A funding round was led by Cycle Capital, along with new investors Goldman Sachs XIG-Industry Ventures, Hina Liberty Capital, Susquehanna International Group, InterVest, Safar Partners, and Ciena. Existing investors including Foothill Ventures, M Ventures, Osage University Partners, and Sierra Ventures also participated in the round.