基于改进的Frantz-Nodvik方程的Yb:KGW再生放大器研究  

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

作　　者：康仁铸 吕仁冲 滕浩[2,4] 朱江峰 魏志义 KANG Renzhu;LYU Renchong;TENG Hao;ZHU Jiangfeng;WEI Zhiyi(School of Physics and Optoelectronic Engineering,Xidian University,Xi’an 710071,China;Beijing National Laboratory for Condensed Matter Physics,Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China;School of Physical Sciences,University of Chinese Academy of Sciences,Beijing 100049,China;Songshan Lake Materials Laboratory,Dongguan 523808,China)

机构地区：[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

出　　处：《量子电子学报》2022年第4期574-582,共9页Chinese Journal of Quantum Electronics

基　　金：国家自然科学基金(12034020,11774277);国家重点研发计划(2018YFB1107201);(综合极端条件实验装置)。

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。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.

关 键 词：激光技术 Frantz-Nodvik方程 掺镱放大器 再生放大 

分 类 号：TN248.1[电子电信—物理电子学]