We experimentally demonstrated diode-pumped continuous wave and tunable laser operation of Yb3+-doped yttrium lanthanum oxide transparent ceramic [Yb:(Y1−xLax)2O3,x=0.1], which was fabricated with nanopowders and sintered in H2 atmosphere. As low as 400mW pumping threshold and a slope efficiency of 52% were realized at 1080nm under a high-brightness 976nm diode pump with a fiber core of 50μm and a numerical aperture of 0.22. A maximum output power of 2.1W was obtained when the non-lasing absorbed pump power was 19.5W at 976nm with diode laser of 400μm fiber core. A smooth tunable curve from 1018to1086nm was achieved at 940nm diode pump. Broadband lasing spectra up to 30nm were observed in the tunable laser experiment.

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The spectrum properties of transparent (Nd0.01Y0.94La0.05)2O3 ceramics were investigated. It was found that all absorption bands of (Nd0.01Y0.94La0.05)2O3 ceramics are broadened, of which the full width at half maximum of the peak centered at 804nm is 8nm and its absorption cross section is 1.02×10−20cm2. The emission cross section of (Nd0.01Y0.94La0.05)2O3 ceramics located at 1078nm is 5.71×10−20cm2 and its fluorescent lifetime is 0.214ms, which are similar to those of 1.0at.%Nd:Y2O3 ceramics. These indicate that (Nd0.01Y0.94La0.05)2O3 transparent ceramics has excellent spectroscopic properties.

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