GRADIENT WAVEGUIDES WITH A GIVEN PROFILE OF REFRACTIVE INDEX ON THE BASIS OF CHALCOGENIDE GLASSY SEMICONDUCTORS FOR MID-INFRARED BAND

The calculation of basic parameters of single-mode planar integrated-optical waveguides based on selenide and telluride materials for the mid-infrared band (λ = 5-20 μm) as well as distribution of electric field component and coefficients of mode localization in planar integrated-optical structures with homogeneous, exponential and parabolic profile of refractive index of waveguide layer was carried out. It was shown that using the gradient CGS film as a waveguide layer with the given refractive index profile enables to adjust the waveguide parameters of a planar integral-optical waveguide in a wide range.