OPTICAL, LUMINESCENCE CHARACTERIZATION AND JUDD-OFELT ANALYSIS OF Sm2O3-Doped TeO2-P2O5-Sb2O3-ZnO GLASS FOR LASER APPLICATIONS

This study conducts an extensive examination of the TeO2-P2O5-Sb2O3-ZnO-Sm2O3 glass composition, with a central focus on physical, structural, optical, and luminescence properties. The optical properties of Sm3+ ions were investigated by the absorption spectrum from the ground state H-6(5/2) to various excited states. The absorption spectra clearly revealed seven bands, with peaks at 972 nm, 1073 nm, 1222 nm, 1365 nm, 1468 nm, 1520 nm, and 1586 nm. These bands correspond to changes that correspond to energy levels F-6(11/2), F-6(9/2), 6 6F F-6(7/2,) F-6(5/2) , F-6(3/2), H-6(15/2) , and F-6(1/2 , ) respectively. Examining the luminescence properties of the glass appears a luminescence spectra characterized by four prominent peaks. These peaks are distinctly attributed to the (4)G(5/2) -> (6)H(s )transitions, where s assumes values of 5/2, 7/2, 9/2, and 11/2, manifesting at wavelengths of 566 nm, 602 nm, 649 nm, and 708 nm, respectively. An interesting finding was the incorporation of Sm2O3 doped into the glass matrix at a concentration of 1 mol%, which produced an interesting quenching effect in the luminescence spectra. This quenching effect assumes paramount significance and catalyzes a comprehensive exploration of the Judd-Ofelt values. The values obtained through this analysis are pivotal in evaluating the potential of this glass composition for laser applications.