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__Nvidia just placed a $4 billion bet on photonics, its largest single infrastructure wager to date. The company is investing in Coherent and Lumentum to solve a growing problem in AI data centers. Nvidia's chips are getting faster, but copper connections cannot keep up.
The investment splits evenly at $2 billion per company. Nvidia's data-center revenue hit $47.5 billion last quarter, fueled by demand from Microsoft, Meta, and Amazon. Optical interconnects promise terabit-per-second throughput, breaking through copper's bandwidth ceiling of roughly 100 gigabits per second.
This signals Nvidia's conviction that photonics will replace copper as the backbone of AI supercomputers. As model training demands surge, the bottleneck has shifted from compute to data movement. Light-based interconnects solve that problem at scale.
But the timeline creates pressure. Silicon-photonic chips require new manufacturing processes, and delivering production-scale hardware within 18 to 24 months remains a serious risk. If Coherent and Lumentum deliver on schedule, Nvidia extends its control deeper into the infrastructure stack. That invites regulatory scrutiny and forces Intel, AMD, and Broadcom to accelerate their own photonics efforts.
The shift from electrical to optical infrastructure could reshape the competitive landscape for years to come.
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