THIN FILM OPTICAL COUPLERS EMPLOYING MODE CONVERSION

An input-output coupler for thin film optical waveguides is disclosed in which the substrate is anisotropic with its optic axis parallel to the plane of the film and the film index is intermediate the substrate indices. The input beam is appropriately polarized and directed through the substrate tow...

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Bibliographic Details
Main Authors KOGELNIK, HERWIG W, SOSNOWSKI, THOMAS P
Format Patent
LanguageEnglish
Published 29.06.1976
Subjects
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
OPTICS
PHYSICS
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Summary:An input-output coupler for thin film optical waveguides is disclosed in which the substrate is anisotropic with its optic axis parallel to the plane of the film and the film index is intermediate the substrate indices. The input beam is appropriately polarized and directed through the substrate toward the film. The input beam is propagated obliquely to the optic axis during coupling and is propagated in a direction either orthogonal or parallel to the optic axis during guiding. The oblique propagation involves some conversion between TE and TM waves. Essentially, the input waves and the output waves of this coupling technique correspond to leaky guided waves in the film.
Bibliography:Application Number: CA19730170686