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Updated: Jun 12, 2026

20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier
Published on: July 12, 2017
Numerical modeling and optimization of gain dynamics in Yb3+ doped YLF and YAG cryogenically cooled amplifiers
Abstract:
A chromatic numerical model is presented for simulating gain dynamics in solid-state laser amplifiers. The model is based on a system of rate equations and incorporates key physical effects, including pump saturation, focused beam propagation inside the gain element, and the temperature and wavelength-dependent properties of the gain medium. By accounting for the wavelength-dependent gain, the model enables a detailed analysis of the seed pulse spectral evolution during amplification, which directly influences the duration of the Fourier-transform-limited pulse after compression. The model performance is demonstrated through simulations of cryogenically cooled amplifiers based on Yb:YLF and Yb:YAG gain materials.
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