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- ItemSpectroscopy and 2.1 µm laser operation of Czochralski-grown Tm3+:YScO3 crystals(Washington, DC : Soc., 2022) Suzuki, Anna; Kalusniak, Sascha; Tanaka, Hiroki; Brützam, Mario; Ganschow, Steffen; Tokurakawa, Masaki; Kränkel, ChristianWe report on growth, temperature-dependent spectroscopy, and laser experiments of Tm3+-doped YScO3 mixed sesquioxide crystals. For the first time, cm3-scale laser quality Tm3+:YScO3 crystals with 2.2 at.% and 3.1 at.% doping levels were grown by the Czochralski method from iridium crucibles. We reveal that the structural disorder in the mixed crystals allows for broad and smooth spectral features even at cryogenic temperatures. We obtained the first continuous wave laser operation in this material at wavelengths around 2100 nm using a laser diode emitting at 780 nm as a pump source. A maximum slope efficiency of 45% was achieved using a Tm3 + (3.1 at.%):YScO3 crystal. Our findings demonstrate the high potential of Tm3+-doped mixed sesquioxides for efficient ultrafast pulse generation in the 2.1 µm range.
- ItemDiode-pumped continuous-wave laser operation of co-doped (Ho,Tm):KLu(WO4)2 monoclinic crystal(Amsterdam [u.a.] : Elsevier, 2013) Jambunathan, V.; Mateos, X.; Cinta Pujol, M.; Josep Carvajal, J.; Griebner, U.; Petrov, V.; Aguiló, M.; Díaz, F.We report on room-temperature continuous-wave laser operation at 2.06 μm in co-doped (0.5 at% Ho, 5.0 at% Tm):KLu(WO4)2 monoclinic crystal pumped at 805 nm by a commercially available AlGaAs diode laser stack. A maximum output power of 93 mW and a slope efficiency of 14.7% with respect to absorbed power were achieved.