This is from Booz Allen's summary of Celestial AI:

Celestial AI is developing a photonic fabric technology for data center compute and memory connectivity. Celestial combines the advantages of photonics, mixed-signal ASICs, and advanced packaging to move data more efficiently both within and between chips via photonic links. Celestial’s photonic fabric enables memory disaggregation, overcoming the memory capacity bottleneck and ensuring all compute and memory can be maximally utilized. Ultimately, this results in 25 times higher bandwidth and 10 times lower latency and power consumption, which will have a disruptive impact both at the edge and in data centers