thz-interconnect
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AttoTude
AttoTude is a Menlo Park, California deep-tech startup building the world's first THz (terahertz) radio over wire - an interconnect platform that moves data between AI servers and GPUs at hundreds of gigabits per second over standard wire, without photonics or exotic packaging. Founded in 2024 by optical-networking veteran Dave Welch and RF/semiconductor pioneer Joy Laskar, the company adapts fiber-grade signaling to terahertz frequencies on low-cost ASICs to break the bandwidth, power, and reliability bottlenecks choking AI data centers. It came out of stealth at OFC 2025 and has raised roughly $91M total, including a $50M Series B led by Mayfield.
Dave Welch
Dave Welch is the founder and CEO of AttoTude, a Menlo Park deep-tech startup building the world's first terahertz interconnect that runs over wire instead of fiber or photonics, aimed at unclogging the data-movement bottleneck inside AI and hyperscale data centers. A co-founder of Infinera, where he pioneered large-scale photonic integrated circuits, and former CTO at SDL, Welch holds more than 200 patents, has authored roughly 300 publications, and is a member of the National Academy of Engineering. In April 2025 AttoTude raised a $50M Series B, pushing total funding past $90M.