| ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS |
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Numerical simulation of the Innoslab laser amplifier based on Yb:YAG crystal |
| Xiang-Yu Qiao(乔向宇), Qi Liu(刘齐), Xiao-Wei Xing(邢笑伟), Yang-Tian Liu(刘扬天), Rui-Qi Liu(刘瑞琪), Xi-Wei Huang(黄玺玮), Hao-Yu Wang(王浩宇), and Wen-Jun Liu(刘文军)† |
| School of Physical Science and Technology, Beijing University of Posts and Telecommunications, Beijing 100876, China |
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Abstract A numerical simulation model is developed for a Yb:YAG Innoslab amplifier. By unfolding the multi-pass folded optical path into a one-dimensional slicing model, the model employs differential iterative calculations. This approach enables high-precision characterization of key physical processes, including spot size evolution, pump-laser saturated absorption distribution, the Yb:YAG reabsorption effect, and the spatial dynamic coupling between the pump and seed beams. Notably, a novel correction mechanism for the small-signal gain coefficient in the overlap regions of adjacent passes is proposed for the first time, specifically addressing the energy re-extraction issue neglected in previous models. This correction significantly enhances the computational accuracy and physical fidelity of the model. Validations against existing experimental data demonstrate high consistency between simulated and measured results, confirming the model’s excellent applicability and reliability. This work provides a reliable theoretical basis for the structural optimization and parameter tuning of Innoslab amplifiers.
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Received: 06 February 2026
Revised: 05 March 2026
Accepted manuscript online: 13 March 2026
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PACS:
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42.65.Sf
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(Dynamics of nonlinear optical systems; optical instabilities, optical chaos and complexity, and optical spatio-temporal dynamics)
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42.55.Xi
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(Diode-pumped lasers)
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42.60.-v
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(Laser optical systems: design and operation)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant No. 10225417) and the National Basic Research Program of China (Grant No. 2006CB601003). |
Corresponding Authors:
Wen-Jun Liu
E-mail: jungliu@bupt.edu.cn
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Cite this article:
Xiang-Yu Qiao(乔向宇), Qi Liu(刘齐), Xiao-Wei Xing(邢笑伟), Yang-Tian Liu(刘扬天), Rui-Qi Liu(刘瑞琪), Xi-Wei Huang(黄玺玮), Hao-Yu Wang(王浩宇), and Wen-Jun Liu(刘文军) Numerical simulation of the Innoslab laser amplifier based on Yb:YAG crystal 2026 Chin. Phys. B 35 054205
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