本文介绍了以稀土Er3+和Ho3+为激活离子,YAG,YAP,YLF,YSGG,GSGG为基质的2～7～3μm激光晶体的特点和应用背景,展示了其中一些晶体的吸收和荧光光谱,讨论了这些晶体的能级结构、光谱和激光特性及器件研究进展,并认为提高效率和激光输出功率以及获得新的特征波长是今后2～7～3 μm激光晶体的主要发展方向.
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