The present invention provides an improved full-duplex optical communications
system. The system includes: at least one office, where the at least one office
provides a plurality of channels, the plurality of channels comprising a plurality
of signal channels and a plurality of continuous wave (CW) channels; at least one
optical add/drop multiplexer (OADM) optically coupled to the at least one office;
and a subscriber premises optically coupled to the at least one OADM, where at
least one of the plurality of signal channels and at least one of the plurality
of CW channels are dropped from the plurality of channels to the subscriber premises
by the at least one OADM, where the subscriber premises modulates the dropped at
least one of the plurality of CW channels, where the modulated at least one of
the plurality of CW channels is added to the plurality of channels by the at least
one OADM.
