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This work describes a cryogenic, electro-optically Q-switched Yb:YAG laser that generates 114-W average TEM00 power with 47% optical-to-optical efficiency. Pulse repetition frequency is 5 kHz, pulse duration is 16 ns full-width at half-maximum, and M2 is less than 1.05.
The properties of solid-state laser materials at cryogenic temperature are attractive for high-power operation and efficiency. In recent experiments, the power scalability and high efficiency have been demonstrated in simple laser architectures.
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