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Diode-Pumped Tm:YAG Ceramic Laser

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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

Affiliations: 1: Key Laboratory of Transparent and Opto-Functional Advanced Inorganic Materials, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China 2: Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Science, Shanghai 201800, China

Publication date: October 1, 2009

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