optical c-band wavelength range

Operating in the 4 to 8 GHz frequency range, C-band satellite coverage is ideal for intercontinental and global communications over land and sea.

L-band, or long band, is a wavelength band immediately adjacent to the Conventional band (C-band) initially used to expand the capacity of terrestrial DWDM optical networks . It is now being introduced to submarine cable operators to do the same thing—expand the total capacity of a submarine cable.