Numerical simulation of the Innoslab laser amplifier based on Yb:YAG crystal

doi:10.1088/1674-1056/ae5175

中国物理B ›› 2026, Vol. 35 ›› Issue (5): 54205-054205.doi: 10.1088/1674-1056/ae5175

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

收稿日期:2026-02-06 修回日期:2026-03-05 接受日期:2026-03-13 发布日期:2026-04-24
通讯作者: Wen-Jun Liu E-mail:jungliu@bupt.edu.cn
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No. 10225417) and the National Basic Research Program of China (Grant No. 2006CB601003).

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

Received:2026-02-06 Revised:2026-03-05 Accepted:2026-03-13 Published:2026-04-24
Contact: Wen-Jun Liu E-mail:jungliu@bupt.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No. 10225417) and the National Basic Research Program of China (Grant No. 2006CB601003).

摘要/Abstract

摘要： 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.

关键词: Innoslab amplifier, Yb:YAG crystal, Frantz-Nodvik equation, multi-pass amplification

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.

Key words: Innoslab amplifier, Yb:YAG crystal, Frantz-Nodvik equation, multi-pass amplification

中图分类号: (Dynamics of nonlinear optical systems; optical instabilities, optical chaos and complexity, and optical spatio-temporal dynamics)

42.65.Sf

42.55.Xi (Diode-pumped lasers) 42.60.-v (Laser optical systems: design and operation)

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[J]. 中国物理B, 2026, 35(5): 54205-054205.

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Numerical simulation of the Innoslab laser amplifier based on Yb:YAG crystal

Numerical simulation of the Innoslab laser amplifier based on Yb:YAG crystal

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