2 ms·
Would you care to explain how the NICT guys achieved 402Tb/s through a single (50km long!) fiber back in 2024 then? It seems like another factor of two would ea
by osamagirl69 6mo ago
Would you care to explain how the NICT guys achieved 402Tb/s through a single (50km long!) fiber back in 2024 then? It seems like another factor of two would easily be in reach if they could extend their setup into the visible.
- lefra 6mo agoFibers are not transparent enough in visible. I found about 10dB/km (to be compared with 0.2 dB/km around 1550nm) [0]. This means that after every km the light intensity is divided by 10, which is completely impractical for telecommunications. [0] https://media.thorlabs.com/globalassets/family-pages/sharedassets/s/sm/sm_fluoride_fiber_attenuation_comparison_g1-780.gif?v=1117010007 https://media.thorlabs.com/globalassets/family-pages/shareda...
- osamagirl69 6mo agoThat depends on the application, the standard for short range (<100m -- fine for most anything that doesn't leave your building) is already to use 800nm.