Investigation of a fiber-optic polarizer with a metal film and a dielectric buffer layer

A model of a plane-layer waveguide is used in a theoretical analysis of the attenuation coefficients of the TM₀ and TE₀ waves in a fiber-optic polarizer with a metal film and two dielectric buffer layers, one of which is the residual part of the fiber cladding. A report is given of the construction and experimental investigation of polarizers with a buffer layer of magnesium fluoride and an aluminum film operating at wavelengths of 0.63 and 0.81 μm and characterized by extinction coefficients of at least 53 and 46 dB, respectively, and by losses not exceeding 0.5 dB.