Abstract
We report on continuous-wave and pulsed laser characteristics of Yb:Y2O3 transparent ceramic at cryogenic temperatures. A VBG stabilized pump diode emitting at 976 nm which matches with the zero-phonon line of the gain media was employed. At 100 K, a maximum continuous-wave output power of 12 W, around three times than that of 300 K and a slope efficiency of 54.4%, 2.4 times than that of 300 K was achieved using an output coupler transmission of 50% with respect to incident power. In passive Q-switched regime, using a Cr:YAG saturable absorber with an initial transmission of 85%, a maximum energy of 0.46 mJ per pulse was obtained with a peak power of 1.64 kW at a repetition rate of 19.6 kHz.
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Funding
European Regional Development Fund and the state budget of the Czech Republic (HiLASE CoE: Grant No. CZ.02.1.01/0.0/0.0/15_006/0000674); European Union’s Horizon 2020 research and innovation program (No. 739573); Ministry of Education, Youth and Sports of the Czech Republic (Program NPU I Project No. LO1602).
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This article is part of the topical collection “Cryogenically-Cooled Lasers” guest edited by Jacob I Mackenzie, Nikolay Ter-Gabrielyan and Yung Fu Chen.
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David, S.P., Jambunathan, V., Yue, F. et al. Efficient diode pumped Yb:Y2O3 cryogenic laser. Appl. Phys. B 125, 137 (2019). https://doi.org/10.1007/s00340-019-7250-8
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DOI: https://doi.org/10.1007/s00340-019-7250-8