Optical waveguides present a revolutionary solution by allowing much greater data transmission per unit area, significantly increasing bandwidth density. NVIDIA has already showcased test chips that achieve optical I/O bandwidth densities around 10 Terabits per second per millimeter (Tbps/mm) of chip edge. This figure is approximately ten times greater than what is achievable with advanced electrical I/O technologies. The implications of this are immense, as it allows for rapid data transfer between compute dies in a large multi-chiplet GPU or between the GPU and its High Bandwidth Memory (HBM) stacks.