Germanium photodetector targets 400-Gbps-per-lane optical links for AI clusters

https://www.eurekalert.org/news-releases/1148870

Summary: CMOS-compatible germanium photodetectors integrated on 300-mm silicon photonics platforms achieve 110 GHz bandwidth/ 95.3% quantum efficiency. Combining semi-embedded germanium absorbing regions with optimized doping/ octagonal contact pads for high-speed data transmission with low dark current. Scalable direct single-lane 400-Gbps optical interconnect hardware for high-performance computing clusters and artificial intelligence data infrastructure.