Yes I believe there is a strong connection. Alexis Bjorlin was on the Celestial AI board and at the time was with Broadcom as SVP & GM of Optical Systems, now with Meta.
FJ summed it up in this post from some time ago.
https://agoracom.com/ir/POETTechnologies/forums/discussion/topics/763182-poet-broadcom/messages/2322000#message
Alexis gave this interview recently. Could POET be powering Meta's AI drive?? Time will tell.
https://tech.facebook.com/ideas/2023/5/meta-infrastructure-ai-alexis-bjorlin/