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High-repetition-rate burst-mode Nd:YAG laser with an optimized side-pumping scheme and a variable reflectivity mirror unstable resonator

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【Author】 Haobo Xu;Renpeng Yan;Zhaodong Chen;Rongwei Fan;Yufei Ma;Xudong Li;National Key Laboratory of Laser Spatial Information,Harbin Institute of Technology;Zhengzhou Research Institute,Harbin Institute of Technology;

【通讯作者】李旭东;

【机构】 National Key Laboratory of Laser Spatial Information,Harbin Institute of Technology； Zhengzhou Research Institute,Harbin Institute of Technology；

【摘要】 We report a high-repetition-rate, side-pumped, and burst-mode Nd:YAG laser utilizing an unstable resonator with a variable reflectivity mirror. A small-signal gain model is developed to improve gain non-uniformity in a side-pumped module. At40 kHz Q-switching, with a 1 ms pump duration, the laser achieves 0.36 J burst energy, 451 kW peak power, and 19 ns pulse width. The output beam exhibits a flat-top profile characterized by a 10th-order super-Gaussian distribution and a coefficient of variation of 0.206. This is the first demonstration, to our knowledge, of flat-top beam generation in a high-repetition-rate side-pumped Nd:YAG burst-mode laser.更多还原

【Abstract】 We report a high-repetition-rate, side-pumped, and burst-mode Nd:YAG laser utilizing an unstable resonator with a variable reflectivity mirror. A small-signal gain model is developed to improve gain non-uniformity in a side-pumped module. At40 kHz Q-switching, with a 1 ms pump duration, the laser achieves 0.36 J burst energy, 451 kW peak power, and 19 ns pulse width. The output beam exhibits a flat-top profile characterized by a 10th-order super-Gaussian distribution and a coefficient of variation of 0.206. This is the first demonstration, to our knowledge, of flat-top beam generation in a high-repetition-rate side-pumped Nd:YAG burst-mode laser.更多还原

【关键词】 high-repetition rate； side pump； burst-mode laser； unstable resonator； flat-top beam；
【Key words】 high-repetition rate； side pump； burst-mode laser； unstable resonator； flat-top beam；

【基金】 supported by the National Natural Science Foundation of China (Nos. 62375066 and 62305085);the National Key Laboratory of Laser Spatial Information Foundation (No. LSI2024JCKY04)

【文献出处】 Chinese Optics Letters ,中国光学快报(英文版) , 编辑部邮箱 ,2026年02期

【分类号】TN248
【下载频次】8

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