Optical-transition properties of the Nd3+ ion in KLu(WO4)2 crystal

Optical absorption and emission intensities of Nd3+ ion in KLu(WO4)2 crystal were investigated. Based on the Judd-Offelt theory, we calculated the following spectral parameters: phenomenological intensity parameters Ω2=5.567×10−20, Ω4=3.597×10−20, and Ω6= 3.800×10−20 cm2. The radiative lifetime of levels 4F3/2 was 182.58 μs. The fluorescence branching ratio for the transition 4F3/2→4I11/2 was 46.98%. In addition, the radiative transition probabilities AJ,Jʹ, oscillator strengths PJ,Jʹ and the values of integrated emission cross sections were also calculated. In comparison with those of other laser crystals, these results indicated that Nd: KLuW is a promising efficient laser material.