Joule-Class 500 Hz Cryogenic Yb:YAG Chirped Pulse Amplifier

High-power solid-state lasers are among the hot research directions at the forefront of laser research and have major applications in industrial processing, laser-confined nuclear fusion, and high-energy particle sources. In this paper, the properties of Yb:YAG and Nd:YAG crystals as gain media for high-power solid-state lasers were briefly compared, according to the results of which Yb:YAG crystals are more suitable for high-power applications. Then, the effects of the thermodynamic and spectral properties of Yb:YAG crystals with temperature were analyzed in detail, and it was shown that the laser beams amplified by the cryogenically cooled Yb:YAG crystals could have higher beam quality, higher pump absorption efficiency, lower pump threshold, and higher gain. The change in properties of Yb:YAG crystal at low temperature makes it more suitable as a gain medium for high-power lasers. Subsequently, two types of kilowatt-class lasers using cryogenically cooled Yb:YAG crystals as gain media are introduced—100 J, 10 Hz nanosecond lasers and 1 J, 1 kHz picosecond lasers. Their configuration, main parameters, and typical output results were analyzed. Finally, future directions in the development of cryogenically cooled Yb:YAG lasers are discussed.

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Recent Development of High-Energy Short-Pulse Lasers with Cryogenically Cooled Yb:YAG

Sui

Yuan

Bai

et al. 2022

Applied Sciences

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Joule-Class 500 Hz Cryogenic Yb:YAG Chirped Pulse Amplifier

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Recent Development of High-Energy Short-Pulse Lasers with Cryogenically Cooled Yb:YAG

Recent Development of High-Energy Short-Pulse Lasers with Cryogenically Cooled Yb:YAG

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