Cryogenic laser operation of a “mixed” Yb:LuYAG garnet crystal

0570871 - FZÚ 2024 RIV DE eng J - Journal Article
Slimi, S. - Jambunathan, Venkatesan - Pan, M. - Wang, Y. - Chen, W. - Loiko, P. - Solé, R.M. - Aguiló, M. - Díaz, F. - Smrž, Martin - Mocek, Tomáš - Mateos, X.
Cryogenic laser operation of a “mixed” Yb:LuYAG garnet crystal.
Applied Physics B-Lasers and Optics. Roč. 129, č. 4 (2023), č. článku 57. ISSN 0946-2171. E-ISSN 1432-0649
R&D Projects: GA MŠMT EF15_006/0000674
EU Projects: European Commission(XE) 739573 - HiLASE CoE
Grant - others:OP VVV - HiLASE-CoE(XE) CZ.02.1.01/0.0/0.0/15_006/0000674
Institutional support: RVO:68378271
Keywords : Yb:(Y,Lu)₃Al₅0₁₂ * Q-switched operation * cryogenic lasers
OECD category: Fluids and plasma physics (including surface physics)
Impact factor: 2.1, year: 2022
Method of publishing: Open access

We report on the continuous-wave and passively Q-switched operation of a compositionally “mixed” heavily doped 16.6 at.% Yb:(Y,Lu)3Al5O12 garnet crystal at cryogenic temperatures (100–200 K), pumped by a volume Bragg grating stabilized diode laser emitting at 969 nm. At 140 K, in the continuous-wave regime, a maximum output power of 10.65 W was achieved at~1029 nm with a slope efciency of 56% (versus the incident pump power), a laser threshold of 1.05 W and excellent beam quality. Using Cr4+:YAG as a saturable absorber, the passively Q-switched laser generated pulses with an energy/duration of 0.15 mJ/201 ns, respectively, at a repetition rate of 39.7 kHz, corresponding to a peak power of 0.39 kW.
Permanent Link: https://hdl.handle.net/11104/0342201