Every major AI training operation is quietly running into the same wall: the speed at which silicon can move data between chips. Every new GPU cluster a hyperscaler adds makes the problem more expensive.
In this episode of We Built It Because We Had To, host Jonathan W. Buckley is joined by Vivek Raghunathan of Xscape Photonics — the deep-tech company spun out of Columbia University research to attack the bandwidth bottleneck at GPU-to-GPU and GPU-to-memory interfaces inside AI data centers. Xscape's core platform is a scalable multi-color laser system: custom silicon photonics built for hyperscale data centers and AI infrastructure operators.
This is not a software company with a slick demo. It's a materials and systems company making a long, capital-heavy bet — and the conversation digs into what that takes: the moment Columbia research stopped being research and started feeling like a company that had to exist, what the skeptics got wrong about the market, what broke first in the university spin-out chaos and how it got fixed, and how a hardware team holds together when timelines slip. Vivek is candid about the growth challenge in front of him now: finding product-market fit and expanding into new segments.
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Xscape Photonics: https://www.xscapephotonics.com
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What is We Built It Because We Had To - Tech Founder Backstories?
We Built It Because We Had To is a founder-interview podcast from The Artesian Network, hosted by Jonathan Buckley. Each episode digs into the real founder journey behind B2B SaaS and tech startups — the backstories, the drama, the lessons, go-to-market, product-market fit, fundraising, enterprise sales, scaling, and how agentic AI is reshaping the bet.