Journal
OPTICAL MATERIALS
Volume 71, Issue -, Pages 117-120Publisher
ELSEVIER
DOI: 10.1016/j.optmat.2016.04.029
Keywords
Hot isostatic pressing; Yb:Y2O3 ceramics; Laser properties
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Highly transparent 5 at.% Yb:Y2O3 ceramics were fabricated by using a combination method of vacuum sintering and hot isostatic pressing (HIP). Co-precipitated Yb:Y2O3 powders, with 1 at.% ZrO2 as the sintering aid, were used as the starting material. The Yb:Y2O3 ceramics, vacuum sintered at 1700 degrees C for 2 h and HIPed at 1775 degrees C for 4 h, exhibited small grain size of 1.9 mu m and highly dense microstructure. In-line optical transmittance of the ceramics reached 83.4% and 78.9% at 2000 and 600 nm, respectively. As the ceramic slab was pumped by a fiber-coupled laser diode at about 940 nm, a maximum output power of 0.77 W at 1076 nm was achieved, with a corresponding slope efficiency of 10.6%. (C) 2016 Elsevier B.V. All rights reserved.
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