Abstract: High quality Nd∶Lu₃Al₅O₁₂(Nd∶LuAG) crystal doped with 1at% Nd³⁺ was grown by the Czochralski method. The spectral properties of the crystal annealed in different atmosphere were characterized. The experiment indicates that the absorption band in 256nm, 467nm and 562nm are connected with Fe³⁺, O^-, and F⁺, respectively. The absorption cross section at 809nm is 1.86×10^-20 cm². The spectral parameters are calculated by JuddOfelt theory, and the intensity parameters Ω₂, Ω₄ and Ω₆ are estimated to be 0.71×10^-20cm², 1.13×10^-20 cm², and 4.36×10^-20 cm², respectively. The calculated radiative probabilities, branch ratios, radiative lifetime and emission cross section are evaluated for the ⁴F_3/2 excited state by using the calculated intensity parameters. The results indicate that Nd∶LuAG crystal is a promising material for solidstate laser application.

Key words: Nd∶LuAG single crystal, absorption spectrum, J-O theory, fluorescence spectrum