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Opt Express. 2011 Jan 31;19(3):2448-55. doi: 10.1364/OE.19.002448.

Zig-zag active-mirror laser with cryogenic Yb3+:YAG/YAG composite ceramics.

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  • 1Institute for Laser Technology, 2-6 Yamada-oka, Suita, Osaka, Japan.


We report on a novel amplifier configuration concept for a 10 kW laser system using a zig-zag optical path based on a cryogenic Yb:YAG Total-Reflection Active-Mirror (TRAM) laser. The laser material is a compact composite ceramic, in which three Yb:YAG TRAMs are combined in series to increase the output power. Output powers of up to 214 W with a slope efficiency of 63% have been demonstrated for CW operation, even at a quite low pump intensity of less than 170 W/cm2. Further scaling could achieve output powers of more than 10 kW.

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