Spectral studies of Sm3+ and Dy3+ doped lithium cesium mixed alkali borate glasses

The effect of host glass composition on the optical absorption and fluorescence spectra of Sm3+ and Dy3+ has been studied in mixed alkali borate glasses of the type 67B2O3 · xLi2O · (32 − x)Cs2O (x = 8, 12, 16, 20 and 24). The Judd–Ofelt intensity parameters (Ω2, Ω4 and Ω6) are calculated. The radiative transition probabilities (A), radiative lifetimes (τR), branching ratios (β) and integrated absorption cross-sections (Σ) are computed for certain excited states of Sm3+ and Dy3+ ions for different x values in the glass matrix. Stimulated emission cross-sections (σp) are obtained for certain emission transitions of two ions in these mixed alkali borate glasses. These parameters are compared for different x values in the glass matrix. Variation of these parameters with x in the glass matrix has been studied.