Temperature dependent luminescence characteristics of Sm 3+-doped silicate glass

Abstract

We report here on the optical characterisation of Sm 3+ (5 wt%): SiO 2+Al 2O 3+Li 2O+Na 2O+MgO glass from the measurements of optical absorption spectra (at 300 K), total luminescence spectra (10–300 K) and fluorescence lifetimes (10–300 K) of the prominent emission transitions of the Sm 3+ ions. Besides its spectral properties, physical and nonlinearity characterising property parameters have also been computed to understand the optical dispersive power of this glass. By the application of Judd–Ofelt parameters ( Ω λ) of the measured absorption spectrum, the radiative transition probability factors ( A) and stimulated emission cross-section ( σ E p) of the observed fluorescent levels have been analysed. Both emission intensity and measured lifetimes of the prominent luminescent transition ( 4G 5/2→ 6H 7/2) concerning Sm 3+-glass has been showing a descending trend with the rise in temperature with N 2-laser (337.1 nm) as the source of excitation.