An Investigation of the Photonic Application of TeO2-K2TeO3-Nb2O5-BaF2 Glass Co-Doped with Er2O3/Ho2O3 and Er2O3/Yb2O3 at 1.54 μm Based on Its Thermal and Luminescence Properties

Abstract

A glass composition using TeO2-K2TeO3-Nb2O5-BaF2 co-doped with Er2O3/Ho2O3 and Er2O3/Yb2O3 was successfully fabricated. Its thermal stability and physical parameters were studied, and luminescence spectroscopy of the fabricated glasses was conducted. The optical band gap, E-opt, decreased from 2.689 to 2.663 eV following the substitution of Ho2O3 with Yb2O3. The values of the refractive index, third-order nonlinear optical susceptibility (chi((3))), and nonlinear refractive index (n(2)) of the fabricated glasses were estimated. Furthermore, the Judd-Ofelt intensity parameters Omega t ( t = 2 , 4 , 6 ) , radiative properties such as transition probabilities (A(ed)), magnetic dipole-type transition probabilities (A(md)), branching ratios (beta), and radiative lifetime (tau) of the fabricated glasses were evaluated. The emission cross-section and FWHM of the I-4(13/2)-> I-4(15/2) transition around 1.54 mu m of the glass were reported, and the emission intensity of the visible signal was studied under 980 nm laser excitation. The material might be a useful candidate for solid lasers and nonlinear amplifier devices, especially in the communications bands.