0.7 at.% Ho:Y₂O₃ transparent ceramics were fabricated by using vacuum sintering plus hot isostatic pressing (HIPing) process. Vacuum sintered at 1500 °C for 12 h followed by HIPing at 1450 °C for 4 h, the Ho:Y₂O₃ ceramics showed excellent in-line transmission and uniform grain size, with an average grain size of about 1 μm. The Ho:Y₂O₃ ceramics showed good thermal conductivity thanks to the identical effective ionic radius between Ho³⁺ and Y³⁺. For the first time, room temperature laser oscillation from Ho:Y₂O₃ transparent ceramics was demonstrated. The uncoated 0.7 at.% Ho:Y₂O₃ ceramic slabs were in-band pumped by a Tm:fiber laser at 1941 nm, and a maximum output power of 1.3 W at 2116.8 nm was achieved with a slope efficiency of 31.2%. It indicates that Ho:Y₂O₃ transparent ceramics could be excellent laser gain medias for 2 μm solid-state laser applications.

通过使用真空烧结加热等静压（HIPing）工艺制造了0.7 at。％Ho：Y ₂ O ₃透明陶瓷。Ho：Y ₂ O ₃陶瓷在1500°C真空烧结12 h，然后在1450°C HIP烧结4 h，表现出出色的在线传输性能和均匀的晶粒尺寸，平均晶粒尺寸约为1μm。由于Ho ³⁺和Y ³⁺之间的有效离子半径相同，因此Ho：Y ₂ O ₃陶瓷具有良好的导热性。首次展示了室温下Ho：Y ₂ O ₃透明陶瓷的激光振荡。未涂层的0.7 at。％Ho：Y用1941 nm的Tm：光纤激光器对₂ O ₃陶瓷板进行带内泵浦，在2116.8 nm处实现最大输出功率1.3 W，斜率效率为31.2％。这表明，Ho：Y ₂ O ₃透明陶瓷可能是2μm固态激光器应用中优异的激光增益介质。