Temperature dependent luminescence characteristics of Sm3+-doped silicate glass

We report here on the optical characterisation of Sm3+ (5 wt%): SiO2 + Al2O 3 + Li2O + Na2O + MgO glass from the measurements of optical absorption spe ctra (at 300 K), total luminescence spectra (10-300 K) and fluorescence lif etimes (10-300 K) of the prominent emission transitions of the Sm3+ ions. B esides its spectral properties, physical and nonlinearity characterising pr operty parameters have also been computed to understand the optical dispers ive power of this glass. By the application of Judd-Ofelt parameters (Omega (lambda)) of the measured absorption spectrum, the radiative transition pro bability factors (A) and stimulated emission cross-section (sigma(p)(E)) of the observed fluorescent levels have been analysed. Both emission intensit y and measured lifetimes of the prominent luminescent transition ((4)G(5/2) --> H-6(7/2)) concerning Sm3+-glass has been showing a descending trend wi th the rise in temperature with N-2-laser (337.1 nm) as the source of excit ation. (C) 2000 Elsevier Science B.V. All rights reserved.