Growth and Spectral Properties of Nd∶Lu_3Al_5O_(12) Crystal

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 4F3/2 excited state by using the calculated intensity parameters.The results indicate that Nd∶LuAG crystal is a promising material for solid-state laser application.