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A comment on 100 Gbps achieved from space to Earth. Parent comment

Re:100 Gbps achieved from space to Earth by tiffanyh on Wednesday December 07, 2022 @03:13PM (#33899608)
That's why I actually ask.

E.g. "light travels approximately 1.5x slower through optical fiber than in a vacuum"

https://www.commscope.com/globalassets/digizuite/2799-latenc...

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Re:100 Gbps achieved from space to Earth by bloggie on Wednesday December 07, 2022 @03:17PM (#33899656)
Fun and somewhat related fact - this is one of the main advantages of hollow-core transmission fibers! As far as I know, currently only used to extend the range of HFT orgs...
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Re:100 Gbps achieved from space to Earth by itishappy on Wednesday December 07, 2022 @10:41PM (#33903885)
Hollow core fiber? Total internal reflection requires the core to be a higher index of refraction than the cladding, so I wonder how that works!

Turns out, it functions differently. Instead of total internal refraction it has to rely on weird physics like photonic crystals. The pictures are absolutely wild.

https://www.rp-photonics.com/hollow_core_fibers.html

https://www.google.com/search?q=hollow+core+fiber&tbm=isch

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Re:100 Gbps achieved from space to Earth by aaronax on Thursday December 08, 2022 @09:21AM (#33908122)
Fascinating; thanks for the links. I wonder how the splicing process works for that.
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Re:100 Gbps achieved from space to Earth by ccakes on Wednesday December 07, 2022 @04:55PM (#33900844)
Terrestrial radio links are similar in that they can be lower latency than fibre though spectrum concerns can come into play.
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Re:100 Gbps achieved from space to Earth by brianwawok on Wednesday December 07, 2022 @05:16PM (#33901111)
Radio links can also often be straighter. Easier to go over someone’s house then ask permission to dig a trench.
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Re:100 Gbps achieved from space to Earth by Arnavion on Wednesday December 07, 2022 @04:21PM (#33900449)
("1.5x slower" == "its speed in optical fiber is 1/1.5 = 2/3 of the speed in vacuum")
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Re:100 Gbps achieved from space to Earth by discordance on Thursday December 08, 2022 @12:39AM (#33904610)
It's all relative.
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