Unified analysis of spatially-coupled absorption and saturation dynamics in multi-pass pumped thin-disk lasers
Abstract
We present a theoretical framework that unifies pump absorption, gain saturation, thermo-optic distortion, and cavity diffraction into a self-consistent model of multi-pass pumped solid-state lasers. By deriving a theoretical formulation of the nonlinear coupling of the superimposed pump energy and effective absorption, we prove an unique steady-state solution exists. Applied to the multi-pass Yb:YAG thin-disk module, the framework is quantitatively validated with experiments, reproducing a well matched absorption tendency, errors in output power, beam diameter and M^2 within 3.0%, 1.7%, and 0.05 respectively. This approach provides predictive guidelines for pump-power scaling and pass-number optimization in high-power lasers.
Keywords
Cite
@article{arxiv.2512.05771,
title = {Unified analysis of spatially-coupled absorption and saturation dynamics in multi-pass pumped thin-disk lasers},
author = {Hanjin Jo and Jiří Mužík and Pawel Sikocinski and Magdalena Sawicka-Chyla and Michal Chyla and Yuya Koshiba and Yoann Levy and Kohei Hashimoto and Martin Smrž and Tomáš Mocek},
journal= {arXiv preprint arXiv:2512.05771},
year = {2026}
}
Comments
9 pages including reference with 3 figures. Data is currently not fully available. The data is currently undergoing data stewardship and will be fully available when the article is published