A good refresher or even likely to be new to some.
Regardless of how the preference is carved up by usage in the marketplace, POET can provide OEs for all of the module-type options.
Last diagram, CAI Photonic Fabric: Blue=optical data flow from and to a FAU* via POET's Starlight. Two Starlights are required - a TX to one CAI node and an RX from another.
Turquoise=optical data flow for a multichip module located between FAU entry and FAU exit.
https://i0.wp.com/semiengineering.com/wp-content/uploads/Fig03_Celestial_AI_photonic_fabric.png?resize=977%2C297&ssl=1
FAU* - Fiber Attach Unit to which a Starlight OE is coupled.