Spectroscopy and diode-pumped laser operation of transparent Tm:Lu.sub.3./sub.Al.sub.5./sub.O.sub.12./sub. ceramics produced by solid-state sintering

0534025 - FZÚ 2021 RIV US eng J - Článek v odborném periodiku
Yue, Fangxin - Loiko, P. - Chen, M. - Maria Serres, J. - Wang, Y. - Li, J. - Basyrova, L. - Dunina, E. - Kornienko, A. - Fomicheva, L. - Dai, S. - Chen, Z. - Bae, J. - Park, T.G. - Rotermund, F. - Jambunathan, Venkatesan - Lucianetti, Antonio - Mocek, Tomáš - Aguil, M. - Díaz, F. - Griebner, U. - Petrov, V. - Mateos, X.
Spectroscopy and diode-pumped laser operation of transparent Tm:Lu₃Al₅O₁₂ ceramics produced by solid-state sintering.
Optics Express. Roč. 28, č. 19 (2020), s. 28399-28413. ISSN 1094-4087
Grant CEP: GA MŠMT EF15_006/0000674; GA MŠMT LO1602; GA MŠMT LM2015086
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: transparent ceramics * solid-state reactive sintering * spectroscopy * Judd-Ofelt theory * diode-pumped laser
Obor OECD: Optics (including laser optics and quantum optics)
Impakt faktor: 3.894, rok: 2020
Způsob publikování: Open access

A transparent Tm:Lu3Al5O12 ceramic is fabricated by solid-state reactive sintering at 1830 °C for 30 h using commercial α-Al2O3 and Lu2O3/Tm2O3 powders and sintering aids - MgO and TEOS. The ceramic belongs to the cubic system and exhibits a close-packed structure (mean grain size: 21 µm). The in-line transmission at ∼1 µm is 82.6%, close to the theoretical limit. The spectroscopic properties of the ceramic are studied in detail. The maximum stimulated-emission cross-section is 2.37×10−21 cm2 at 1749nm and the radiative lifetime of the 3F4 state is about 10 ms. The modified Judd-Ofelt theory accounting for configuration interaction is applied to determine the transition probabilities of Tm3+ , yielding the intensity parameters Ω2 = 2.507, Ω4 = 1.236, Ω6 = 1.340 [10−20 cm2 ] and α = 0.196×10−4 cm. The effect of excited configurations on lower-lying interconnected states with the same J quantum number is discussed.

Trvalý link: http://hdl.handle.net/11104/0312244