Abstract：The (RE):YVO4 crystals with high quality optical properties and various dopant concentrations of Tm3+，Er3+ and Yb3+ were grown using the Czochralski method. The room temperature fluorescence spectra have been measured，with 326 and 658 nm used as a pumping source. The fluorescence spectral properties were analysed with various dopant concentrations of rare-earth ions. Upconversion luminescence for various dopant concentrations was discussed.
Key words：RE:YVO4 Crystals;Fluorescence spectrum;Upconversion luminescence;Energy transfer
[1] LIN Shu-kun et al(林树坤等). J. of Fuzhou University(Sic. and Tech.) (福州大学学报)，2000，28(6): 82. [2] ZHANG Li-zhen et al(张莉珍等). 双掺YVO<sub>4</sub>晶体的生长与表征: [学位论文]. 2000. [3] ＷANG Yｕ-hｕ et al. J. Appl. Phｙs.，1993，74(2)：170. [4] Brenier A, Pedrini C, Moncorge Ｒ. Optical and Quantum Electronics, 1990, 22(1): 153. [5] FENG Yan，CHEN Ｘiao-bo，LI Ｋｕn et al(冯 衍，陈晓波，李 昆等). Spectroscopy and Spectral Analysis(光谱学与光谱分析)，1998，18(4): 390. [6] Tanabe S, CHEN Xiao-bo, LLI Kun et al. J. of Luminescence, 1995, 65: 247.
