3μm波段稀土离子激活的氟化物激光晶体研究进展

Research Progress of Fluoride Laser Crystals Activated by 3μm Rare Earth Ions

中红外激光在卫星遥感、军事对抗、分子监测、激光医疗、基础科学等领域具有非常重要的应用价值.总结了以LiLuF_4、PbF_2为基质,稀土Ho^(3+)和Dy^(3+)为激活离子的2.7~3.1μm波段中红外激光晶体在生长、物化、光谱及激光性能等方面的研究进展.着重分析了激活离子Ho^(3+)和Dy^(3+)的浓度效应、共掺敏化离子Yb^(3+)的敏化机制、共掺退激活离子Pr^(3+)的抑制自终止效应机理;同时计算了相关的能量传递效率,揭示其能量传递机制.此外,提出中红外激光晶体的几个主要研究方向:提高晶体发光效率,开拓新的特征输出波长,探索新型低声子能量的基质晶体.

Mid-infrared waveband lasers have demonstrated important applications in the fields of satellite remote sensing, military confrontation, molecule monitoring, laser medicine and basic scientific researches. We reviewed the research development of crystal growth, physicochemical, spectrum and laser properties of mid-infrared laser crystals at the wavelength range of 2.7-3.1μm which take Ho3＋ , Dy3＋ as matrix and LiLuF4, PbF2 as activated ions. We focused on the analysis of the concentration effect of activated ions Hoa＋ and Dy3＋ , the sensitization mechanism of the co-dopant sensitized ions Yb3＋ , and the mechanism of the deactivated ions Pr3＋ on the inhibition of self-termination effect. These results show that the main development direction of the 2.7-3.1μm mid-infrared laser crystals includes the improvement of luminous efficiency, the exploitation of new characteristic wavelength and the exploitation of novel low phonon energy crystals.