this post was submitted on 07 Dec 2023
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652
Japanese Institute breaks optical fiber speed record with 22.9 petabits per second — 1,000 times faster than existing cables (www.tomshardware.com)
submitted 9 months ago by [email protected] to c/[email protected]
70 comments fedilink hide all child comments
 

Speedy thing goes in, speedy thing comes out.

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[–] [email protected] 29 points 9 months ago (1 children)

The financial types are generally more interested in hollow core fiber, to get their latencies even further down for high frequency trading. Because light travels at almost c in hollow core but only at 2/3 c in fiber core.

[–] [email protected] 3 points 9 months ago (2 children)

So is hollow core fiber a vacuum or is it just hollow? I've never heard of that tech.

[–] [email protected] 7 points 9 months ago (2 children)

Think glass pipe versus glass cylinder or rod. Though, I don't think the hollow core is fully empty, it has some structure to it.

Here is an example

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

[–] [email protected] 4 points 9 months ago

I work with fibre and have never stopped to think if it is hollow or not. Thanks for this

[–] [email protected] 2 points 9 months ago (1 children)

How do you weld that?

[–] [email protected] 1 points 9 months ago

Absolutely no idea.

[–] [email protected] 2 points 9 months ago* (last edited 9 months ago)

I think that both hollow core fibers filled with air and others with just vacuum exist, but it's a bit far from my operational reality, so I'm not that sure. I just read in industry news that euNetworks has deployed 45 km of Lumenisity hollowcore fiber and that Microsoft bought Lumensity