Optical, magneto-optical properties and fiber-drawing ability of tellurite glasses in the TeO2-ZnO-BaO ternary system

TL;DR

This study characterizes the optical and magneto-optical properties of TeO2-ZnO-BaO glasses, demonstrating their potential for fiber applications with detailed spectral analysis and showing how composition affects their optical parameters.

Contribution

It provides new insights into the optical and magneto-optical properties of TZB tellurite glasses and demonstrates their fiber-drawing capability with specific mid-infrared attenuation data.

Findings

High refractive index and Verdet constant values.

BaO substitution increases refractive indices and magneto-optical effects.

Successful fiber drawing with low mid-infrared attenuation.

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, 0.193 um, up to mid infrared, 25 um spectral region. Studied glasses exhibited large values of linear (n632 = 1.91-2.09) and non-linear refractive index (n2 = 1.20-2.67x10-11 esu), Verdet constant (V632 = 22-33 radT-1m-1) and optical band gap energy (Eg = 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 60TeO2-20ZnO-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.