[Tech Note] Why does AI still have to wait with tens of thousands of GPUs? How silicon photonics and CPO are building the ‘highways of light’
October 29, 2026
▲ In the pluggable architecture on the left, electrical signals travel from the switch ASIC to the front-panel optical modules. In the CPO architecture on the right, the central switch ASIC and surrounding optical engines are placed on a common package substrate, significantly shortening the electrical connection distance.
