Quintessent bags $40M to develop lasers for AI clusters
Optical interconnect startup Quintessent Inc. today announced that it has raised $40 million in funding to ramp up production of its hardware.
Cycle Capital led the Series A raise. It was joined by Goldman Sachs, Susquehanna International Group, Osage University Partners and several others. The investment follows a $11.4 million seed round in 2024.
Data center operators link together the artificial intelligence chips in their servers using fiber-optic cables. Data travels through fiber-optic cables in the form of light. Usually, that light is generated by a tiny laser-emitting chip embedded in network equipment. Quintessent offers a device dubbed a comb laser that it says is more durable and efficient than existing light sources.
Some network lasers generate light using microscopic structures called quantum wells. Those structures usually take the form of nanosheets made of two different materials with diverging optical properties. Quintessent’s device, in contrast, generates light using quantum dots. Those are nanostructures that usually have a spherical shape and are made of a single material rather than two.
