The optical properties and laser characteristics of Cr and Nd co-doped Y3Al5O12 ceramics |
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| Authors: | H. Yagi T. Yanagitani H. Yoshida M. Nakatsuka K. Ueda |
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| Affiliation: | aTakuma Works, Konoshima Chemical Co. Ltd., 80 Koda, Takuma-cho, Mitoyo-gun, Kagawa 769-1103, Japan;bInstitute for Laser Science, University of Electro-Communications, 1-5-1 Chofugaoka, Chofu, Tokyo 182-8585, Japan;cInstitute of Laser Engineering, Osaka University, 2-6 Yamada-oka, Suita, Osaka 565-0871, Japan |
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| Abstract: | We have fabricated Cr3+ and Nd3+ co-doped YAG (Cr;Nd:YAG) ceramics, and investigated their optical properties and laser characteristics. The Cr;Nd:YAG has two broad absorption bands at around 440 nm (4A2→4T1) and 600 nm (4A2→4T2) respectively, caused by Cr3+ ions. In the case of pumping at 440 nm, the maximum effective lifetime of the Cr;Nd:YAG was 737 μs with a 0.1 at% Cr3+ and 1.0 at% Nd3+ co-doped YAG sample. Cr3+ ions take a role of an effective sensitizer to convert the UV light of flashlamp. For single-shot laser operation, a 10.4 J output energy at 1064 nm was obtained with 0.1 at% Cr3+ and 1.0 at% Nd3+ co-doped YAG ceramic rod with a laser efficiency of 4.9%. The laser efficiency was found to be more than twice that of a 1.0 at % Nd3+:YAG ceramic rod. |
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| Keywords: | Ceramic laser Cr3+ and Nd3+ co-doped: YAG Lamp-pumped laser |
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