Comment by Razengan
5 days ago
> speed of light in a fiber optic is only ~2/3rds of speed of light in a vacuum
That made me wonder: Why can't we use vacuum cables?
(the sort of questions I should probably be bothering an LLM with.. someone should make a LMGPTTFY)
If you figure out how to make cheap vacuum cables you will probably become very rich.
But otherwise chains of microwave links does get much closer to c in applications where you want absolute lowest latency (or much more commonly, when digging a fiber line is too expensive)
> Why can't we use vacuum cables?
Hollow-core fiber is basically this!
> LMGPTTFY
"let me go prompt that for you" or "let me GPT that for you"?
> "let me go prompt that for you" or "let me GPT that for you"?
yes
Not vacuum but an inert gas: https://www.thefoa.org/tech/ref/fiber/Hollow-core-fiber.html