Two-micron lasing is obtained on the 5 I 7 → 5 I 8 transition of Ho 3+ ions in ZrO 2 – Y 2 O 3 – Ho 2 O 3 crystals upon resonance pumping into the 5 I 7 level of these ions by a pulsed laser based on a Tm : LiYF 4 crystal. The efficiency of conversion of pump radiation incident on the crystal to laser radiation and the slope lasing efficiency at a pulse duration of 8 ms and a pulse repetition rate of 10 Hz were 25% and 28%, respectively.

中文翻译：

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Tm：LiYF 4激光器泵浦的ZrO 2 – Y 2 O 3 – Ho 2 O 3晶体的激光发射特性

在通过脉冲将ZrO 2 – Y 2 O 3 – Ho 2 O 3晶体中的Ho 3+离子共振泵浦到这些离子的5 I 7能级中时，Ho 3+离子在5 I 7→5 I 8跃迁上获得了两微米的激光发射。基于Tm：LiYF 4晶体的激光。入射在晶体上的泵浦辐射转换为激光辐射的效率以及在8 ms的脉冲持续时间和10 Hz的脉冲重复频率下的斜率激光发射效率分别为25％和28％。