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Relation between predictions of geometrical-optics and wave-optics methods for the modal attenuation constant in an overmoded bent hollow slab waveguide

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Abstract

An essential difference is found between the modal attenuation constants predicted by the geometrical-optics and wave-optics methods for a gently bent overmoded two-dimensional hollow waveguide. The difference can be reduced in higher-order modes when the axial-phase-constant change that is due to the bend is taken into account in the geometrical-optics method.

© 1988 Optical Society of America

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