量子电子学报 ›› 2022, Vol. 39 ›› Issue (4): 574-582.doi: 10.3969/j.issn.1007-5461.2022.04.012

• 激光技术与器件 • 上一篇    下一篇

基于改进的Frantz-Nodvik 方程的 Yb: KGW 再生放大器研究

康仁铸1;2, 吕仁冲1;2, 滕浩2;4, 朱江峰1, 魏志义1;2;3;4   

  1. ( 1 西安电子科技大学物理与光电工程学院, 陕西西安710071; 2 中国科学院物理研究所, 北京凝聚态物理国家研究中心, 北京100190; 3 中国科学院大学物理科学学院, 北京100049; 4 松山湖材料实验室, 广东东莞523808 )
  • 收稿日期:2021-01-15 修回日期:2021-02-06 出版日期:2022-07-28 发布日期:2022-07-28
  • 通讯作者: E-mail: hteng@iphy.ac.cn; jfzhu@xidian.edu.cn E-mail:E-mail: hteng@iphy.ac.cn; jfzhu@xidian.edu.cn
  • 作者简介:康仁铸( 1997 - ), 河南南阳人, 研究生, 主要从事超短脉冲激光放大方面的研究。E-mail: rzkang@stu.xidian.edu.cn
  • 基金资助:
    Supported by National Natural Science Foundation of China (国家自然科学基金, 12034020, 11774277), National Key R & D Program of China (国家重点研发计划, 2018YFB1107201), the Synergic Extreme Condition User Facility (综合极端条件实验装置)

Study on Yb: KGW regenerative amplifier based on improved Frantz-Nodvik equation

KANG Renzhu1;2, LYU Renchong1;2, TENG Hao2;4, ZHU Jiangfeng1, WEI Zhiyi1;2;3;4   

  1. ( 1 School of Physics and Optoelectronic Engineering, Xidian University, Xi’an 710071, China; 2 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China; 3 School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China; 4 Songshan Lake Materials Laboratory, Dongguan 523808, China )
  • Received:2021-01-15 Revised:2021-02-06 Published:2022-07-28 Online:2022-07-28

摘要: 超快激光再生放大过程具有复杂的动力学行为, 需要建立模型进行求解和迭代计算。基于改进的 Frantz-Nodvik 方程计算了Yb:KGW 晶体再生放大器的输出性质, 研究了泵浦强度、晶体长度和泵浦脉宽对放大 器输出性能的影响, 同时对不同重复频率再生放大器的输出行为进行了分析。在此基础上设计了再生放大器, 得 到了重复频率1 kHz、单脉冲能量1 mJ 的激光放大结果, 与理论分析结果符合得较好。该改进的Frantz-Nodvik 方程对于设计高重复频率、大能量且性能稳定的激光放大器具有参考价值。

关键词: 激光技术, Frantz-Nodvik 方程, 掺镱放大器, 再生放大

Abstract: The process of ultrafast laser regenerative amplification has complex dynamic behavior that requires to build a model for solution and iterative calculation. Based on the improved Frantz-Nodvik equation, the output properties of the Yb:KGW regenerative amplifier are calculated, the influences of pumping intensity, crystal length and pumping duration on the output performance of the amplifier are investigated, and the output behaviors of the regenerative amplifier with different repetition rates are also analyzed. Based on the theoretical analysis, a regenerative amplifier is constructed and the laser amplification results with pulse energy of 1 mJ at repetition rate of 1 kHz are realized, which are in good agreement with the theoretical analysis results. The improved Frantz-Nodvik equation gives an insight into the design of laser amplification which is scalable to high pulse energy with high stability at high repetition rate.

Key words: laser techniques, Frantz-Nodvik equation, ytterbium-doped amplifier, regenerative amplifier

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