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OttoVonNoob@lemmy.ca
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to Memes@lemmy.ml ·
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2 years ago

Don't belive big telecom

lemmy.ca

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Don't belive big telecom

lemmy.ca

OttoVonNoob@lemmy.ca
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to Memes@lemmy.ml ·
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2 years ago
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  • reddithalation@sopuli.xyz
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    2 years ago

    i mean its glass, could just melt it down

    • xradeon@lemmy.one
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      2 years ago

      Sure, but the glass core is only 8–9 µm wide, it’s a minuscule amount of glass compared to copper cables so it’s not really worth it to melt it down.

      • Caboose@lemmy.world
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        2 years ago

        Most optical fiber is 125um of glass with 250um coating. The coating and the jacketing that make up the cable (mostly non-recyclable plastic) are the real problem.

        • xradeon@lemmy.one
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          2 years ago

          I don’t know of any fiber that the core is 125 microns. Can you link to one? Neither Single Mode nor Multi Mode fiber is that large.

          • Caboose@lemmy.world
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            2 years ago

            Sure: https://www.prysmiangroup.com/sites/default/files/business_markets/markets/downloads/datasheets/SMF---Single-Mode-Optical-Fiber-SSMF.pdf

            You are right the core of most optical fibers is either 8-9um for singlemode, or 62.5 or 50um for multimode. The cladding, which is also made of glass, surrounds the core and this is almost always 125um. Often there is more than one layer that makes up the cladding glass to help reduce the bend radius before you start to attenuate your signal. You need both the core and the cladding of different refractive indexes to create total internal reflection, which is how fiber optics work over long distances with low loss.

            The glass (core + clad) is the only part of the fiber that is really recyclable. Everything else is plastic that is difficult to chemically remove.

            There’s a lot of really bad literature out there on fiberoptics, so I don’t really blame anyone for not knowing this stuff. Here’s a pretty good article that sums up how fiberoptics work I pulled off google: https://www.ofsoptics.com/faq-guide-to-fiber-optic-cable/how-do-communications-fiber-optic-cables-work/

    • lorty@lemmygrad.ml
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      2 years ago

      What makes fiber optic useful is the fact that it is a very specific kind of glass.

      • Strykker@programming.dev
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        2 years ago

        But it’s still dirt fucking cheap to produce.

        The expensive parts of fibre are the transmitters/receivers at each end and the labour to splice/terminate it properly.

    • Gabu@lemmy.worldBanned
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      2 years ago

      It’s hyper complex glass

      • Caboose@lemmy.world
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        2 years ago

        Some are complex, most aren’t I’d say.

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