alt Hacker NewsI feel the same way about how fiber optics can create bandwidth by just slicing up the spectrum for different channels of data (my rudimentary understanding anyway). I like how even after all this time we find new and clever ways to work with light.
Replies
pfdietz • today at 4:50 PM
And then doing amplification on that light without converting it back to electrical signals.
ranger_danger • today at 6:02 PM
Wavelength-division multiplexing[1]... it's what they use with fiber-to-the-home to get bidirectional signals with a single strand of fiber. Or the big-boy version is DWDM which ISPs use to stuff dozens of customers on a single strand.
You might also be interested in https://phys.org/news/2026-11-air-holes-silicon-wafers-flat....
[1] https://en.wikipedia.org/wiki/Wavelength-division_multiplexi...
Even more wild than spectrum slicing is polarisation encoding multiple data streams on the same wavelength.