since the light range is so high, technically speaking as the technology improves does that mean we could end up sending petabytes a second over a single fiber optic core?
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.
Fibers 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.
That 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.
