The photonics world just got a serious cash injection. OpenLight, a startup spun out from Synopsys, has closed a $34 million Series A round to scale its integrated photonics chips—specifically for the ravenous data centers powering AI.
The round was co-led by Xora Innovation and Capricorn Investment Group, with backing from heavy hitters like Juniper Networks (now part of HPE) and Lam Capital. The message is clear: the industry is betting big that light, not electrons, will move data inside next-gen AI clusters.
The Photonics Playbook
OpenLight’s secret sauce is something called a photonic application-specific integrated circuit, or PASIC. Think of it as a custom chip that uses light instead of electricity to shuttle data. The company’s key innovation is a process design kit (PDK) that integrates indium phosphide lasers directly onto a silicon photonics platform—a notoriously tricky feat that has kept many rivals stuck in the lab.
This isn’t just academic. The PDK has already been validated at Tower Semiconductor’s foundry, meaning designs are production-ready from day one. Over 20 companies are already using it to build custom photonic chips for telecom, automotive sensing, and even quantum computing.
Speed and Scale
The funding will target two specific bottlenecks. First, OpenLight plans to expand its component library, including a leading 400Gb/s modulator and on-chip laser technology. Second, it’s ramping up reference designs at 1.6Tb/s and 3.2Tb/s—speeds that will be critical for connecting thousands of GPUs in AI training clusters.
“Optical connectivity has become critical for next-gen AI architectures,” says Dipender Saluja of Capricorn. He’s right: as electrical interconnects hit physical limits, photonics is the only viable path forward.
What This Means
The photonics industry has long promised a revolution, but scaling manufacturing has always been the Achilles’ heel. OpenLight’s bet is that its open PDK—combined with a foundry partner like Tower—can break that logjam. With 360 patents in its pocket and a fresh $34 million, the company is positioning itself as the go-to platform for the optical data center era. If it works, the biggest winner won’t be OpenLight—it’ll be the AI models that finally get the bandwidth they’ve been starving for.
