Growth, structure, spectroscopy, and laser operation of a “Mixed” Yb (Y,Lu).sub.3./sub.Al.sub.5./sub.O.sub.12./sub. garnet crystal

0579752 - FZÚ 2024 RIV CH eng J - Článek v odborném periodiku
Slimi, S. - Loiko, P. - Pan, M. - Lehoux, P. - Jambunathan, Venkatesan - Smrž, Martin - Mocek, Tomáš - Wang, Y. - Chen, W. - Petrov, V. - Solé, R.M. - Aguiló, M. - Díaz, F. - Camy, P. - Mateos, X.
Growth, structure, spectroscopy, and laser operation of a “Mixed” Yb (Y,Lu)₃Al₅O₁₂ garnet crystal.
Crystals. Roč. 13, Nov (2023), č. článku 1588. ISSN 2073-4352. E-ISSN 2073-4352
Grant CEP: GA MŠMT EF15_006/0000674
GRANT EU: European Commission(XE) 739573 - HiLASE CoE
Grant ostatní: OP VVV - HiLASE-CoE(XE) CZ.02.1.01/0.0/0.0/15_006/0000674
Institucionální podpora: RVO:68378271
Klíčová slova: garnet crystals * ytterbium ion * crystal structure * optical spectroscopy * solid-state lasers
Obor OECD: Optics (including laser optics and quantum optics)
Impakt faktor: 2.7, rok: 2022
Způsob publikování: Open access

A single crystal of ytterbium-doped “mixed” yttrium–lutetium aluminum garnet with a stoichiometric composition of (Y0.601Lu0.233Yb0.166)3Al5O12 was grown by the Czochralski method and its structure, vibronic, spectroscopic, and laser properties were studied. The stimulated-emission cross-section for Yb3+ ions was maximized to 2.53 × 10−20 cm2 at 1031 nm. The emission bandwidth was ~8 nm, and the reabsorption-free luminescence lifetime of the 2F5/2 state was 1.063 ms. Pumped at 941 nm, the Yb laser generated a maximum output power of 1.04 W at 1.03 and 1.05 µm with a high slope efficiency of 76.4% and a laser threshold of 76 mW. A continuous wavelength tuning over a range of 51.6 nm (1026.4–1078.0 nm) was also achieved. Power scaling was achieved using a 969 nm diode-pumped microchip cavity. A maximum output power of ~9 W was obtained at 1.05 µm with a slope efficiency of 76% and an almost circular laser beam profile.
Trvalý link: https://hdl.handle.net/11104/0348550