OE - optical engine
LE - light engine
PF+MA - Photonic Fabric+Memory Applicance
PF+MA node - One xPU+HBM combination within a PF-MA
AI Cluster - The number of PF-MA nodes located within a PF-MA.
There are four LEs (StarLights) per PF-MA node.
OEs in the top diagram. LEs in the bottom diagram:
https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcThLyxC2c_Nr6OMkv5R1dqZThOpI9aNjQf1cA&s