Abstract In this paper, with the modified Bridgeman method, 1 mol% Ho, x mol% Pr: BaY2F8 (x = 0, 0.2, 0.5, 0.8, 1.2) crystals were successfully prepared and their emission properties were studied. The X-ray diffraction data of the crystals showed that the crystals still maintained the monoclinic structure of the host. The infrared emission spectra showed that the doping of Pr3+ ions weakened the intensity of the emission peak at 2.0 μm and enhanced the intensity of the emission peak at 2.9 μm of the crystals. The optimal doping concentration of Pr3+ ions was 0.5%. As the doping concentration of Pr3+ ions increased, the lifetime of the 5I7 level of Ho3+ ions decreased from 2.03 ms to 0.23 ms, thus promoting particle number reversal and laser operation. As for Ho, Pr: BaY2F8 crystal, the energy transfer efficiency from Ho: 5I7 level to Pr: 3F2 level was calculated to be 88.7%.

中文翻译：

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Pr离子对Ho发射性能的失活影响：1-4 μm范围内的BaY2F8晶体

摘要 本文采用改进的Bridgeman 法成功制备了1 mol% Ho, x mol% Pr: BaY2F8 (x = 0, 0.2, 0.5, 0.8, 1.2)晶体并研究了其发射特性。晶体的X射线衍射数据表明晶体仍保持主体的单斜结构。红外发射光谱表明，Pr3+离子的掺杂减弱了晶体2.0 μm处的发射峰强度，增强了晶体2.9 μm处的发射峰强度。Pr3+离子的最佳掺杂浓度为0.5%。随着 Pr3+ 离子掺杂浓度的增加，Ho3+ 离子 5I7 能级的寿命从 2.03 ms 降低到 0.23 ms，从而促进了粒子数反转和激光操作。对于Ho，Pr：BaY2F8晶体，从Ho：5I7能级到Pr的能量传递效率：