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# Optical Interconnect Startup Raises $80M to Replace Copper in AI Data Centers
- URL: https://adjacent.media/signals/optical-interconnect-startup-raises-80m-to-replace-copper-in-ai-data-centers/
- Published: 2026-06-20T16:06:58.000Z
- Updated: 2026-06-20T16:06:58.000Z
- Description: As GPU clusters scale beyond 100,000 units, traditional copper wiring becomes the physical constraint limiting AI training speeds and efficiency—a problem that silicon abundance has made visible.
- Author: Jonathan Greene
- Tags: #signal, theme-connected, hardware, data center infrastructure, gpu interconnects

Source: [The Next Web](https://thenextweb.com/news/hyperlight-tfln-photonics-80m-series-c-ai-interconnects?ref=adjacent.media)

As GPU clusters scale beyond 100,000 units, traditional copper wiring becomes the physical constraint limiting AI training speeds and efficiency—a problem that silicon abundance has made visible. This funding round reflects a hard infrastructure shift: the bottleneck moved from compute to communication, making optical interconnects a suddenly urgent business, not a research curiosity. The investors backing this are hardware makers themselves, signaling that incumbents view optical switching as table-stakes infrastructure for the next generation of AI clusters, not a speculative bet.