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Dmitri Kuzin

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Proceedings Article | 27 November 2023 Paper

High-energy gradient doped Yb:YAG thin slab laser amplifier

A. Starobor, D. Kuzin, I. Kuznetsov, O. Palashov

Proceedings Volume 12760, 1276006 (2023) https://doi.org/10.1117/12.2687175

KEYWORDS: Laser radiation, Doping, Lasers, Laser amplifiers, Crystals, Thermal effects, Absorption

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A concept of compact, scalable and reliable solid-state amplifier based on thin slab is proposed. It combines the following features: single pass pump and signal propagation without internal reflections; use of a gradient doped thin-slab AE; beam guiding effect pre-compensation. The direct passage of the radiation allows to obtain a high quality of the beam (M2⪅1.4). Thin slab geometry and gradient doping provide excellent heat dissipation and low heating (30 °C at 500 W pumping power). The amplification of stretched and pre-amplified femtosecond radiation reached 3.6 (with input of 6 mJ) at a pump power of 500 W, so output energy was 22 mJ at 1.5kHz. A further increase in the output energy is possible according to calculations, up to 100 mJ, which is limited by the breakdown threshold of the output end at a pump power of 1 kW.

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