Multi-mJ, kHz, 2.1 μm optical parametric chirped-pulse amplifier and high-flux soft x-ray high-harmonic generation
Multi-mJ, kHz, 2.1 μm optical parametric chirped-pulse amplifier and high-flux soft x-ray high-harmonic generation
复制标题
DOI：
10.1364/ol.39.003145
复制
发表时间：
2014-06-01
期刊：
影响因子：
3.6
通讯作者：
Kaertner, Franz X.
中科院分区：
文献类型：
--
作者：
Hong, Kyung-Han;Lai, Chien-Jen;Kaertner, Franz X.
报道了一个多mJ的2.1 μ m光参量啁啾脉冲放大（OPCPA）系统，该系统由皮秒低温Yb：YAG激光器泵浦，重复频率为1 kHz，并在Ar中实现了160 eV的软X射线高次谐波产生（HHG），其通量约为2 × 10（8）光子/s/1%带宽。1 kHz低温Yb：YAG泵浦激光器将脉冲放大到56 mJ，并将压缩的42 mJ，17 ps脉冲传输到2.1 μ m OPCPA系统。在三级OPCPA链中，我们已经获得了高达2.6 mJ的输出能量在2.1 μ m和脉冲压缩到40 fs具有良好的光束质量。最后，我们显示截止扩展HHG驱动的Ar和N-2气体电池中的2.1 μ m源到190 eV的高光子通量。我们的三维传播模拟证实了软X射线阿秒脉冲的产生与Ar的实验。(C)2014年美国光学学会
We report on a multi-mJ 2.1 mu m optical parametric chirped-pulse amplification (OPCPA) system operating at 1 kHz repetition rate, pumped by a picosecond cryogenic Yb:YAG laser, and the demonstration of soft x-ray high-harmonic generation (HHG) with a flux of similar to 2 x 10(8) photon/s/1% bandwidth at 160 eV in Ar. The 1 kHz cryogenic Yb:YAG pump laser amplifies pulses up to 56 mJ and delivers compressed 42 mJ, 17 ps pulses to the 2.1 mu m OPCPA system. In the three-stage OPCPA chain, we have obtained up to 2.6 mJ of output energies at 2.1 mu m and pulses compressed to 40 fs with good beam quality. Finally, we show cut-off extension of HHG driven by this 2.1 mu m source in Ar and N-2 gas cells to 190 eV with high photon flux. Our 3D propagation simulation confirms the generation of soft x-ray attosecond pulses from the experiment with Ar. (C) 2014 Optical Society of America