Optical absorption and emission properties of Nd 3+ -doped oxyfluorosilicate glasses for solid state lasers

Abstract Optical absorption and near-infrared luminescent properties of Nd 3+ ions doped oxyfluorosilicate (NKZLSNd) glasses were investigated. Raman spectrum was recorded to investigate the structural properties of NKZLSNd glasses. The Judd–Ofelt theory (JO) has been applied to the absorption spectrum of 1.0 mol% Nd 3+ -doped oxyfluorosilicate glass to derive the JO intensity parameters ( Ω λ ), which are in turn used to calculate the radiative properties of Nd 3+ ions luminescent levels. The near-infrared emission spectra recorded with 808 nm laser diode excitation revealed the effective bandwidths values around 30–40 nm for the 4 F 3/2 level of Nd 3+ -doped oxyfluorosilicate glasses. The measured decay times of 4 F 3/2 level decreased with increasing Nd 3+ ions concentration due to the concentration quenching.