在紫外光辐照下,Nd:YAG晶体的瞬态色心的出现,引起激光波长上明显的瞬态吸收。本文利用这个现象,研究了滤光材料的紫外滤光性能。采用组合Nd:YAG连续激光系统,可以有效地选择激光器中适用的滤光材料。此外,我们得到了组合激光系统中不同棒的阈值泵浦功率相互依赖关系的公式,与K.Mori的公式相比,我们给出了含有各个系数的定量表达式。

The obvious transient absorption at the laser wavelength in Nd:YAG laser crystals is attributed to the production of transient colour centres, induced by UV light irradia-tion. The filtering characteristics of the materials are investigated by means of this phenomenon. The filtering materials suitable to lasers are selected effectively using the combined Nd: YAG cw laser system. In addition, we obtained the relation between pumping powers of different rods at the threshold in the combined laser. As compared with Mori's, our formula is a quantitative expression containing a variety of coefficients.