Abstract
AbstractSesquioxides were considered as promising gain medium for high power ultrafast laser. Broadening of emission spectrum plays a crucial role in shortening the pulse width of laser. In this paper, the ratio of lutetium oxide and scandium oxide was adjusted to control the emission wavelength and spectral width. Highly sinterable Yb:(LuxSc1–x)2O3 nanopowders were synthesized through the glycine‐nitrate combustion process. Transparent Yb:(LuxSc1–x)2O3 ceramics were fabricated via vacuum sintering at 1750℃ for 10 h, among which Yb:(Lu0.5Sc0.5)2O3 ceramics have the highest transmittance, reaching 78% at 1100 nm. With increasing Lu2O3 content, the emission wavelengths corresponding to the two transitions of Yb:(LuxSc1–x)2O3 were blueshifted 8 and 15 nm, respectively. Most importantly, from Yb:Sc2O3 to Yb:(Lu0.5Sc0.5)2O3, spectral broadening of the two emission wavelengths was observed by 9 and 16 nm, respectively. Thus, the Yb:(LuxSc1‐x)2O3 ceramics exhibiting high transmittance and broad emission band are promising for ultrashort pulse generation.
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