Abstract. We developed a compact 2-μm intracavity-pumped Ho : YVO4 laser using a diode-pumped Tm:YAP laser at room temperature. Before applying the Ho laser, the lasing characteristics of the a-cut Tm:YAP laser were studied, and a maximum output power of 2.76 W at 1951.6 nm was obtained under an incident laser diode pump power of 25 W with a slope efficiency of 15.8%. Under the same cavity structure, the continuous-wave Ho : YVO4 laser yielded a maximum output power of 1.7 W at 2052.7 nm for an incident diode pump power of 29 W, corresponding to a slope efficiency of 10.4%. The beam quality factor (M2) of the Ho : YVO4 laser at the maximum output power was estimated to be 1.16 and 1.26 in the horizontal and vertical directions, respectively, which indicates the occurrence of near-diffraction-limited beam propagation.

中文翻译：

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使用二极管泵浦 Tm:YAP 激光器开发的紧凑型腔内泵浦 Ho:YVO4 激光器

摘要。我们在室温下使用二极管泵浦 Tm:YAP 激光器开发了一种紧凑的 2-μm 腔内泵浦 Ho:YVO4 激光器。在应用Ho激光器之前，研究了a-cut Tm:YAP激光器的激光特性，在25 W的入射激光二极管泵浦功率和15.8的斜率效率下，在1951.6 nm处获得了2.76 W的最大输出功率%。在相同的腔结构下，连续波 Ho : YVO4 激光器在 2052.7 nm 处产生的最大输出功率为 1.7 W，入射二极管泵浦功率为 29 W，对应的斜率效率为 10.4%。Ho : YVO4 激光器在最大输出功率下的光束品质因数 (M2) 在水平和垂直方向估计分别为 1.16 和 1.26，这表明发生了近衍射限制的光束传播。