Essentially the transceiver optics are applying the same modulation and coding that have been used in point-to-point microwave for a long time... Starting from OOK, up to BPSK and then on to QPSK, 16QAM and possibly 64QAM with varying levels of FEC.
A singlemode fiber is just an extremely narrow diameter waveguide. Big difference in frequency between a 71-86 GHz FDD radio pair and optical at 191 to 196 THz. On Fri, Jul 8, 2016 at 1:50 AM, Rod Beck <[email protected]> wrote: > The new undersea cable systems are now capable of 18 terabits per fiber > pair. It is interesting how combinations of bits are being represented by > combinations of optical features. > > > > http://www.lightwaveonline.com/articles/print/volume-30/issue-5/features/which-optical-modulation-scheme-best-fits-my-application.html > > > Roderick Beck > > Director of Global Sales > > United Cable Company > > www.unitedcablecompany.com<http://www.unitedcablecompany.com> > >
