7 ms·
Vint Cerf has stated that the theoretical capacity of fiber is 38THz of analog bandwidth: http://www.nnsquad.org/archives/nnsquad/msg01402.html http://www.nnsqu
by oasisbob 15y ago
Vint Cerf has stated that the theoretical capacity of fiber is 38THz of analog bandwidth:
http://www.nnsquad.org/archives/nnsquad/msg01402.html http://www.nnsquad.org/archives/nnsquad/msg01402.html
I'd be interested to hear how close this record gets to the theoretical maximum, and where the intrinsic limit comes from.
- workerthread 15y agoThe intrinsic limit comes from the frequency range for which the fiber is transparent (or rather, the attenuation is low "enough"). And this in turn depends on the composition of the glass the fiber is made from. The wavelength range currently standardized for telecommunication is 1260nm-1675nm [1], which corresponds to 59 THz as far as I can tell. I don't know which wavelength range Vint Cerf had in mind. [1] http://en.wikipedia.org/wiki/Fiber-optic_communication#Transmission_windows http://en.wikipedia.org/wiki/Fiber-optic_communication#Trans...