Spectroscopic properties of Dy3+-doped NaGd(MoO4)2 crystal

Abstract A single crystal 1.85 at% Dy 3+ :NaGd(MoO 4 ) 2 was grown by the Czochralski method and spectroscopic properties of the crystal were investigated. Room temperature polarized absorption spectra were analyzed by the Judd–Ofelt theory. Then the intensity parameters, spontaneous transition probabilities, branching ratios, and radiative lifetimes of Dy 3+ ions in the crystal were obtained. The peak polarized emission cross-sections for the 4 F 9/2 → 6 H 13/2 transition were calculated to be 1.62 × 10 −20 and 1.35 × 10 −20 cm 2 for π and σ polarizations respectively by the Fuchtbauer–Ladenburg equation. The fluorescence decay curve and quantum efficiency of the 4 F 9/2 multiplet were measured to be 156 μs and 74%, respectively. The experimental results show that the Dy 3+ :NaGd(MoO 4 ) 2 crystal can be pumped directly by commercially available 450 nm blue laser diodes and may be a promising yellow laser material.