(under subclass 2) Subject matter wherein the normal zero phase of a constant amplitude optical wave (i.e., carrier wave) is shifted by an angle proportional to the amplitude of an impressed signal (i.e., modulating signal).
(1) Note. A sinusoidal signal of zero phase will have a zero amplitude at the intersection of the x-y axis.
SEE OR SEARCH CLASS
359, Optics: Systems (Including Communication) and Elements,
238+, for temporal phase modulation outside of a waveguide.
