Rare-earth ions doped sesquioxide ceramics exhibit notable advantages,including high thermal conductivity,low phonon energy,and high laser damage threshold,thereby demonstrating significant potential for solid-state laser applications.Powders with high purity and low agglomeration were synthesized by chemical co-precipitation method,then 5％(atomic fraction)Yb∶Lu2O3 transparent ceramics with high density and high transparency were obtained through oxygen pre-sintering and hot isostatic pressing(HIP)sintering.The samples have an average grain size of less than 1 μm,and exhibit an in-line transmittance of above 81％at 1 100 nm.The absorption cross-section at 974 nm is～0.97×10-20 cm2,and the emission cross-section at 1.08 µm is～0.39×10-20 cm2.Using a 976 nm laser diode as the pump source,a continuous-wave(CW)laser output at 1 080.1 nm is achieved from the fabricated Yb∶Lu2O3 ceramics at room temperature,with a output power of 11.67 W and slope efficiency of 55.3％.
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