3 ms·
The highest frequency you can practically send long distances over coax is around 1-2GHz. When I had a cable modem the highest I saw was 900MHz. Therefore,
by opwieurposiu 3y ago
The highest frequency you can practically send long distances over coax is around 1-2GHz. When I had a cable modem the highest I saw was 900MHz. Therefore, regardless of what encoding scheme you use you will never get more then a couple GHz of bandwidth.
Visible light starts at 400THz so right off the bat you get 10k times more more headroom before physics becomes the limiting factor.
- deleted 3y ago[deleted]
- kepler1 3y agoI was thinking somehow that the response / recovery time of the silicon detectors to react to the laser pulses would be a limiting factor, is that at all valid? Like, you cannot blink faster than <x> nanoseconds and get a CCD(?) to see it properly. (I'm sure it's not like a CCD with readout, etc. but whatever mechanism is the correct one, is there some natural minimum read time?)