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 11 months ago by [email protected] to c/[email protected]
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Speedy thing goes in, speedy thing comes out.

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[–] [email protected] 6 points 11 months ago (5 children)

optical fiber speed record

Isn't that simply the speed of light, always? ;-)

[–] [email protected] 12 points 11 months ago (2 children)

Nope, if we are talking about the actual speed of the signal optical fiber is relatively slow at ~1/3 c, compared to air or copper where it's almost c. They're using 'speed' meaning bandwidth. A van full of sd cards would have a massive bandwidth, but a very slow actual speed

[–] [email protected] 12 points 11 months ago* (last edited 11 months ago) (1 children)

Actually it's about 2/3 c, the refractive index of normal telco fibers (G.652 and G.655) is around 1.47

[–] [email protected] 3 points 11 months ago

Cool information, thanks!

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