中文摘要：

采用坩埚下降法生长了系列共掺的Pr, Y： SrF2和Pr, Gd： SrF2晶体, 研究了调剂离子对Pr： SrF2晶体晶胞参数和光谱性能的影响规律。研究结果表明, 掺杂不同种类和浓度的调剂离子可以有效提高晶体的吸收截面和发射强度。同时, 调剂离子通过改变晶体内部的团簇构型和发光中心的局域配位结构, 使Pr, R3＋： SrF2（R=Y, Gd）晶体各峰位的发光强度变化规律不一致： 绝大部分峰位发光强度先增加到峰值后减小, 极个别变化趋势相反或发光强度基本保持不变。结合晶胞参数和荧光寿命图谱也可以证明调剂离子对晶体内部团簇和局域结构的影响。总之, 掺入调剂离子后, Pr： SrF2晶体的光学性能更优, 尤其是共掺入6.0at%Y3＋或10.0at%Gd3＋后, 其光学性能达到最佳。

英文摘要：

A series of co-doped Pr, Y： SrF2 and Pr, Gd： SrF2 crystals were grown by the vertical Bridgman method and the influence of codoping ions on the lattice parameters and spectral properties of Pr： SrF2 crystal was studied. The results show that the doping of different kinds and concentration of the regulator ions can effectively improve the crystal absorption cross-section and emission intensity. Through changing the cluster structure and the local coordination structure of the luminescent center of the crystals, the law of different peaks’ emission intensities of Pr, R3＋： SrF2（R=Y, Gd） crystals varies with each other. Most of the peaks’ emission intensities increase firstly and then decrease, and other few peak’s law is opposite or its emission intensity keeps nearly unchanged. Influence of the regulator ions on internal cluster and local structure of the crystal is testified based on the unit cell parameters and the fluorescence lifetime spectra. In general, the optical properties of Pr： SrF2 crystals are improved after codoping with the regulator ions, especially with 6.0at% Y3＋ and 10.0at% Gd3＋, which optical properties reach the best.