(under subclass 129) Subject matter wherein the structure that is used to confine and guide the light through modal transmission is a dielectric rib, planar, or channel waveguide.
(1) Note. The thin-film is a thin layer of light transmitting material, usually deposited by sputtering or evaporation, that may be made in a pattern to form an optical waveguide on, or adjacent to, a supporting substrate.
(2) Note. This subclass includes graded index thin-film waveguides.
SEE OR SEARCH CLASS
359, Optics: Systems (Including Communication) and Elements,
332, for a dielectric optical waveguide used in frequency converters.
