4 ms·
"space-division multiplexing" LOL, you mean "stringing another wire/fiber". I think we used to call this "bonding".
by ryanmarsh 7y ago
"space-division multiplexing"
LOL, you mean "stringing another wire/fiber". I think we used to call this "bonding".
- adrianmonk 7y agoI'm not a hardware engineer or anything, but apparently it's a little more innovative than that. From Google's page (https://cloud.google.com/blog/products/infrastructure/a-quick-hop-across-the-pond-supercharging-the-dunant-subsea-cable-with-sdm-technology https://cloud.google.com/blog/products/infrastructure/a-quic...) about the previous cable which uses it: > Traditional subsea cables are powered from the shore end and rely on a dedicated set of pump lasers to amplify the optical signal for each fiber pair as data traverses the length of the cable. Now, SDM technology allows pump lasers and associated optical components to be shared among multiple fiber pairs, while still working within the unique power constraints of the ocean floor. I don't profess to understand laser pumping, but it sounds like they found a way for multiple fiber pairs to share expensive and/or power-hungry active components. So it is stringing another fiber, but in layman's terms maybe kind of like network bonding by figuring out a trick to plug two ethernet cables into one port.
- KaiserPro 7y agonot quite. http://modegap.eu/?publication=space-division-multiplexing&wppa_open=yes http://modegap.eu/?publication=space-division-multiplexing&w... (PDF) Its a way of making QAM16 less crosstalky (well thats my reasoning. )