Optical, magneto-optical properties and fiber-drawing ability of tellurite glasses in the TeO2-ZnO-BaO ternary system
Abstract
The presented work is focused on the optical and magneto-optical characterization of TeO2-ZnO-BaO (TZB) tellurite glasses. We investigated the refractive index and extinction coefficient dispersion by spectroscopic ellipsometry from ultraviolet, λ = 0.193 μm, up to mid-infrared, λ = 25 μm spectral region. Studied glasses exhibited large values of linear (n(632) approximate to 1.91-2.09) and non-linear refractive index (n(2) approximate to 1.20-2.67x10(-11) esu), Verdet constant (V(632) approximate to 22-33 rad T(-1)m(-1)) and optical band gap energy (E(g) approximate to 3.7-4.1 eV).
The materials characterization revealed that BaO substitution by ZnO leads (at constant content of TeO2) to an increase in linear and nonlinear refractive index as well as Verdet constant while the optical band gap energy decreases. Fiber drawing ability of TeO2-ZnO-BaO glassy system has been demonstrated on 60TeO(2)-20ZnO-20BaO glass with presented mid infrared attenuation coefficient.
Specific parameters such as dispersion and single oscillator energy, Abbe number, and first-/ third-order optical susceptibility are enclosed together with the values of magneto-optic anomaly derived from the calculation of measured dispersion of the refractive index.