Highly transparent Tm:YAG ceramic was fabricated by a solid-state reaction and vacuum sintering. The optical properties, the microstructure, and the laser performance of the Tm:YAG ceramic were investigated. A Tm:YAG ceramic with an average grain size of ∼10 m was obtained by sintering at 1750°C for 10 h. The in-line transmittance was 84.0% at 2015 nm. The absorption coefficients at 681 and 785 nm were 8.23 and 3.27 cm−1, respectively. The grain boundaries were clean and no secondary phase was observed. The 6 at.% Tm:YAG ceramic slab (1.2 mm × 5 mm × 6 mm) was end-pumped by a laser diode at 792 nm, and the maximum output power of 4.5 W was obtained with a slope efficiency of 20.5% at 2015 nm.
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Document Type: Research Article
Key Laboratory of Transparent and Opto-Functional Advanced Inorganic Materials, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Science, Shanghai 201800, China
Publication date: October 1, 2009