Sub-fs pulse formation in a seeded hydrogenlike plasma-based x-ray laser dressed by an infrared field: Analytical theory and numerical optimization
Sub-fs pulse formation in a seeded hydrogenlike plasma-based x-ray laser dressed by an infrared field: Analytical theory and numerical optimization
复制标题
DOI：
10.1103/physrevresearch.2.023255
复制
发表时间：
2020-06-01
影响因子：
4.2
通讯作者：
Kocharovskaya, Olga
中科院分区：
文献类型：
--
作者：
Khairulin, I. R.;Antonov, V. A.;Kocharovskaya, Olga
我们推导了描述亚飞秒脉冲形成过程的解析理论，从准单色种子极紫外（XUV）辐射，它在类氢等离子体基X射线激光器的倒置活性介质中传播由强红外激光场修整。我们讨论了最终的能力和限制，这个过程的基础上推导出的解析解和广泛的数值研究的情况下，锂2+等离子体为基础的X-射线激光与载波波长为13.5 nm。我们分析了等离子体色散的作用，并找到了最佳的条件，形成阿秒脉冲的最高对比度。在最佳条件下，来自活性介质的放大自发辐射的影响可以忽略不计。所产生的XUV脉冲的峰值强度可以超过10（10）-10（11）W/cm（2），而脉冲的持续时间在400-600 as的范围内变化。
We derive the analytical theory describing the process of subfemtosecond pulse formation from a quasimonochromatic seeding extreme ultraviolet (XUV) radiation, which propagates in the inverted active medium of a hydrogenlike plasma-based x-ray laser dressed by a strong infrared laser field. We discuss the ultimate capabilities and limitations of this process on the basis of the derived analytical solution and extensive numerical studies for the case of the Li2+ plasma-based x-ray laser with a carrier wavelength of 13.5 nm. We analyze the role of plasma dispersion and find the optimal conditions for the formation of attosecond pulses with the highest contrast. Under optimal conditions, the influence of amplified spontaneous emission from the active medium is negligible. The peak intensity of the produced XUV pulses can exceed 10(10) -10(11) W/cm(2), while the duration of pulses varies in the range of 400-600 as.