Optics Instead of Copper: Nvidia Pours $4B into Photonics

On March 2-3, 2026, Nvidia announced a strategic investment of $4 billion in optical component manufacturers Lumentum and Coherent. Copper cable is officially recognized as the bottleneck of the artificial intelligence industry.

The problem lies in hard physics. When you combine 100,000 GPUs into a single supercomputer, latency and heat buildup when transmitting data over copper buses become fatal. Silicon photonics allows terabytes of data to be transmitted between server racks using light (lasers), radically reducing power consumption and increasing bandwidth. Nvidia is not just buying shares; it is cementing exclusive access to next-generation optical transceivers to maintain its monopoly on AI data center architecture. Without optics, LLM scaling will simply stall.

Source: Reuters / NVIDIA