We present our efforts towards power scaling of Er:Lu₂O₃ lasers at 2.85 µm. By applying a dual-end diode-pumped resonator scheme, we achieve an output power of 14.1 W at an absorbed pump power of 59.7 W with a slope efficiency of 26%. In a single-end pumped resonator scheme, an output power of 10.1 W is reached under 41.9 W of absorbed pump power. To the best of our knowledge, this is the first single crystalline mid-infrared rare-earth-based solid-state laser with an output power exceeding 10 W at room temperature.

导模法是一种超高熔点晶体的有效生长方法，可以生长高质量、大尺寸、高掺杂的Er∶Lu₂O₃晶体。本文测试了导模法生长的Er∶Lu₂O₃晶体的荧光发射谱及连续激光特性，在室温下获得了斜效率为23.1% 的2.85 μm连续激光输出，最高输出功率5.24 W。80 min功率RMS（Root mean square）稳定性优于1.4%，不同输出功率水平的激光光束质量M²因子优于2.17。实验结果表明，导模法生长的Er∶Lu₂O₃激光晶体具备输出高功率、高效率中红外激光的能力。

Zirconium carbide (ZrC) with layered structure and nanoparticle morphology was prepared by sonication in an ethyl alcohol solvent. The morphology and saturable absorption properties of the ZrC were systematically analyzed. By using ZrC nanoparticle coated substrates as saturable absorbers, stable Q-switched 3 μm Er:Lu2O3 lasers were realized. Pulse durations of 50 ns with pulse energies of 20 μJ and peak power of 0.4 kW are the shortest obtained with novel-material-based Q-switched lasers in the 3 μm wavelength range.