光学学报, 2022, 42 (9): 0914002, 网络出版: 2022-05-21   

100 kHz腔倒空薄片激光器理论与实验研究 下载: 611次

Theoretical and Experimental Research on 100 kHz Cavity-Dumped Thin-Disk Laser
作者单位
1 华中科技大学光学与电子信息学院, 湖北 武汉 430074
2 M.F.Stelmakh股份有限公司极地研究所, 俄罗斯 莫斯科 117342
摘要
对100 kHz运转的腔倒空薄片激光器的输出特性进行了理论和实验研究。首先建立起腔倒空薄片激光器的速率方程理论模型,模型中考虑了单位时间谐振腔中新增的自发辐射光子数,对其占总自发辐射光子数的比例进行了分析,并结合一些参数进行了仿真。进一步搭建了重复频率为100 kHz的腔倒空薄片激光器实验装置,获得了平均功率为253 W的纳秒激光脉冲输出,光光效率约为35.2%,脉冲宽度为10.4 ns,单脉冲能量为2.53 mJ,脉冲的峰值功率超过了200 kW, xy方向的光束质量M2分别为9.77和9.27。针对腔倒空调Q的动力学稳定性问题,研究了普克尔盒开关时间对输出平均功率和输出脉冲稳定性的影响,实验中观察到了倍周期分岔和确定性混沌现象,从理论上对这个现象进行了仿真分析,仿真结果可与实验结果相符。
Abstract
In this article, we carried out theoretical and experimental studies on the output characteristics of a cavity-dumped thin-disk laser operating at 100 kHz. Firstly, a theoretical model of the rate equation of the cavity-dumped thin-disk laser was established. The model considered the number of spontaneous emission photons newly added in the resonant cavity per unit time, and the ratio of the number of spontaneous emission photons to the total number of spontaneous emission photons was analyzed. And then we performed simulations based on some parameters. Next, we built a cavity-dumped thin-disk laser with a repetition rate of 100 kHz, and the average power of nanosecond laser pulse output was 253 W. The optical-optical efficiency was about 35.2%, the pulse width was 10.4 ns, and the single pulse energy was 2.53 mJ. The peak power exceeded 200 kW, and the optical quality M2 in the x and y directions was 9.77 and 9.27, respectively. For the dynamic stability of the cavity-dumped Q-switching, the influence of Pockels cell gate time on the output power and stability of the output pulse was further studied. In the experiment, the phenomenon of period doubling bifurcation and deterministic chaos were observed. The simulation results are consistent with the experimental results.

董静, 陈涵天, 王海林, 朱广志, Kozlov Aleksei, 朱晓. 100 kHz腔倒空薄片激光器理论与实验研究[J]. 光学学报, 2022, 42(9): 0914002. Jing Dong, Hantian Chen, Hailin Wang, Guangzhi Zhu, Aleksei Kozlov, Xiao Zhu. Theoretical and Experimental Research on 100 kHz Cavity-Dumped Thin-Disk Laser[J]. Acta Optica Sinica, 2022, 42(9): 0914002.

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