We demonstrate a composite Tm/Ho:YLF laser for the first time via the integration of Tm-doped and Ho-doped YLF crystals into a single bulk gain medium. Considering the incident pump power at 792 nm, maximum output power of 10.2 W at 2063 nm with power instability of 0.55% was obtained, corresponding to an optical conversion efficiency of 25.5% and slope efficiency of 29.6 %. Thermal stability of the Ho laser with a decrement in the output power of 30 mW/°C was shown by varying the cooling temperature from 10 °C to 28 °C. This work provides a compact, accessible, and efficient Ho laser to directly use the existing diode lasers (LDs).

中文翻译：

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高效复合Tm/Ho:YLF激光器

我们通过将 Tm 掺杂和 Ho 掺杂的 YLF 晶体集成到单个体增益介质中，首次展示了复合 Tm/Ho:YLF 激光器。考虑到 792 nm 的入射泵浦功率，在 2063 nm 处获得了 10.2 W 的最大输出功率，功率不稳定性为 0.55%，对应于 25.5% 的光转换效率和 29.6% 的斜率效率。通过将冷却温度从 10°C 改变到 28°C，显示了输出功率降低 30 mW/°C 的 Ho 激光器的热稳定性。这项工作提供了一种紧凑、可访问且高效的 Ho 激光器，可以直接使用现有的二极管激光器 (LD)。