Comment on Japanese Institute breaks optical fiber speed record with 22.9 petabits per second — 1,000 times faster than existing cables

IHeartBadCode@kbin.social ⁨1⁩ ⁨year⁩ ago

• Kazumara@feddit.de ⁨1⁩ ⁨year⁩ ago

  The breakthrough isn’t things moving faster but more fibers per cable.

  No, it’s actually more cores per fiber, and using those very well for space division multiplexing on top of the normal wavelength division multiplexing. They are talking about 22.9 Pb/s per fiber, not cable, the Tom’s Hardware article is just wrong.

  Cables can already contain hundreds of fibers, for example 576 here or into the thousands if you use stacks of ribbon cables in the subunits, for example 3456 here

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  • bassomitron@lemmy.world ⁨1⁩ ⁨year⁩ ago

    Here’s a source that backs up what you’re talking about and proving that the TomsHardware article is wrong: www.nict.go.jp/en/press/2023/11/30-1.html

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    • Kazumara@feddit.de ⁨1⁩ ⁨year⁩ ago

      Thank you!

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      • DaMonsterKnees@lemmy.world ⁨1⁩ ⁨year⁩ ago

        Yes, thanks to all for contributing and assisting. I am grateful for the clarification and leg work. Folks say reddit had this, and lemmy has less, so every time I see it, I make sure to appreciate it.

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  • neidu@feddit.nl ⁨1⁩ ⁨year⁩ ago

    Am I to understand that the cable use has multiple cores within a single cladding? Interesting approach…

    Now we get to classify them as singlemode, multimode, and multiestmode.

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    • Kbobabob@lemmy.world ⁨1⁩ ⁨year⁩ ago

      Yeah. Check this comment

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  • aStonedSanta@lemm.ee ⁨1⁩ ⁨year⁩ ago

    This is really interesting. Thank you for providing good insight!

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