The crystal growth,x-ray diffraction patte,absorption spectrum,emission spectrum,and fluorescence lifetime of a Tb:Lu2O3 single crystal were studied.Excited at 483 nm,the peak absorption cross-section was calculated to be 3.5×10-22 cm2,and the full width at half maximum was found to be 2.85 nm.The Judd-Ofelt(J-O)intensity parameters Ω2,Ω4,and Ω6 were computed to be 3.79×10-20 cm2,1.30×10-20 cm2,and 1.08×10-20 cm2,with a spectroscopic quality factor Ω4/Ω6 being 1.20.The emission cross-sections of green emission around 543 nm and yellow emission around 584 nm were calculated to be 9.43×10-22 cm2 and 1.32×10-22 cm2,respectively.The fluorescence lifetime τexp of 5D4 was fitted to be 1.13 ms.The data suggest that the Tb:Lu2O3 crystal could be a potential candidate for green and yellow laser operation.