Liu Xuesheng, Jia Wenzeng, Song Yiheng, Yang Song, Liu Shu, Liu Youqiang, Yan Anru, Wang Zhiyong
Opt Express. 2020 Mar 16;28(6):8016-8026. doi: 10.1364/OE.383724.
In this article, it is demonstrated the generation of high pulse energy, high beam quality and high brightness mode-locked picosecond pulses from a compact Nd:YVO master oscillator power amplifier system. This system mainly consisted of a SESAM mode-locked picosecond seed generator and four-stage multi-pass amplifiers. A pulse picker was adopted prior to power amplifiers to efficiently reduce the pulse repetition rate. The maximum average output power of 65.5 W was obtained with a repetition rate of 496.85 kHz and a pulse duration of 16.9 ps, corresponding to a maximum pulse energy of 131.83 µJ and a peak power of 7.8 MW. While simultaneously, the output beam quality factors along the x axis and the y axis were measured to be M =1.36 and M =1.32, respectively, therefore, a brightness as high as 3.22 × 10 W·cm·Sr was achieved. As far as we all know, this is the highest brightness for a picosecond pulsed Nd:YVO MOPA laser at 1064 nm.
钒酸钇主振荡功率放大器系统中产生高脉冲能量、高光束质量和高亮度的锁模皮秒脉冲。该系统主要由一个SESAM锁模皮秒种子源发生器和四级多程放大器组成。在功率放大器之前采用了一个脉冲拾取器，以有效降低脉冲重复率。在重复频率为496.85kHz、脉冲持续时间为16.9ps的情况下，获得了65.5W的最大平均输出功率，对应最大脉冲能量为131.83µJ，峰值功率为7.8MW。同时，测量得到沿x轴和y轴的输出光束质量因子分别为M =1.36和M =1.32，因此，实现了高达3.22×10W·cm·Sr的亮度。据我们所知，这是1064nm皮秒脉冲钕：钒酸钇主振荡功率放大器激光器的最高亮度。
