Yin Xingliang, Fu Yang, Lei Hong, Zhu Zhanda, Tai Boyin, Huang Yutao, Li Qiang
Opt Express. 2025 Jul 28;33(15):31429-31436. doi: 10.1364/OE.565844.
In this paper, a high efficiency in-band pumped two-stage Nd:YVO partially pumped slab (Innoslab) picosecond amplifier with a pulse duration <10 ps is demonstrated. The output characteristics of the second stage amplifier under different saturated injection laser power are studied through simulation and experiments. And being benefit from the in-band pumping technique, the excellent thermal management and the good mode matching of the Innoslab amplifier design, an average output power of 700 W with a pulse duration of 9.8 ps at 2 MHz is obtained finally, and total pump power is 1449 W, corresponding to the overall optical-to-optical conversion efficiency of 47.7%. The maximum extraction efficiency of the second amplifier reaches 54.8%. The beam quality factors M at the maximum output power in the horizontal and vertical directions are measured to be 1.36 and 1.06, respectively.
本文展示了一种脉宽<10 ps的高效带内泵浦两级Nd:YVO部分泵浦片状（Innoslab）皮秒放大器。通过模拟和实验研究了第二级放大器在不同饱和注入激光功率下的输出特性。得益于带内泵浦技术、出色的热管理以及Innoslab放大器设计良好的模式匹配，最终获得了平均输出功率700 W、脉宽9.8 ps、重复频率2 MHz的输出，总泵浦功率为1449 W，对应的总光光转换效率为47.7%。第二级放大器的最大提取效率达到54.8%。在最大输出功率下，水平和垂直方向的光束质量因子M分别测得为1.36和1.06。
