Structural-phase state and lasing of 5–15 at% Yb3+:Y3Al5O12 optical ceramics. Issue 13 (October 2017)

• Record Type: Journal Article
• Authors: Vorona, I.O.; Yavetskiy, R.P.; Doroshenko, A.G.; Parkhomenko, S.V.; Baumer, V.N.; Tolmachev, A.V.; Kosyanov, D.Yu.; Vovna, V.I.; Kuryavyi, V.G.; Greculeasa, M.; Gheorghe, L.; Hau, S.; Gheorghe, C.; Croitoru, G.
• Is Part Of: Journal of the European Ceramic Society. Volume 37:Issue 13(2017)
• Page Start: 4115
• Page End: 4122
• Publication Date: 2017-10
• Subjects: Yb3+:Y3Al5O12 -- Reactive sintering -- Recrystallization -- Laser ceramics -- Solid-state lasers; Ceramic materials -- Periodicals; Composite materials -- Periodicals; Matériaux céramiques -- Périodiques; Composites -- Périodiques; Ceramic materials; Composite materials; Periodicals; Electronic journals; 666.05
• DOI: 10.1016/j.jeurceramsoc.2017.05.023
• Languages: English
• ISSNs: 0955-2219

Abstract

Abstract: Yttrium aluminum garnet (Yb 3+ :Y3 Al5 O12 ) laser ceramics doped by 5, 10 and 15 at% of ytterbium ions were obtained by reactive sintering. Optimal sintering temperature range for the formation of highly-dense transparent Yb 3+ :Y3 Al5 O12 ceramics under normal recrystallization conditions was found to be T = 1750–1800 °C. The influence of Yb 3+ ions on structural-phase state, phase composition, microstructure, optical and luminescent properties of sintered samples was experimentally investigated. It was shown that lattice parameter a of Yb 3+ :Y3 Al5 O12 ceramics decreases linearly with increasing of Yb 3+ concentration in a good agreement with L. Vegard's rule, that indicates to the formation of (Y1−x Ybx )3 Al5 O12 (х = 0.05–0.15) substitutional solid solutions. No concentration quenching of Yb 3+ luminescence was observed in Yb 3+ :Y3 Al5 O12 within the 5–15 at% doping range. Quasi-CW lasing of Yb 3+ :Y3 Al5 O12 ceramics was studied under diode-pumping at 970 nm. A highest slope efficiency of about 50% was obtained for 15 at%-doped Yb 3+ :Y3 Al5 O12 ceramics sintered at T = 1800 °C for 10 h.