Modulation of ionization on laser frequency in ultra-short pulse intense laser–gas-target
Modulation of ionization on laser frequency in ultra-short pulse intense laser–gas-target
复制标题
DOI：
10.1088/1009-1963/15/10/028
复制
发表时间：
2006-10
期刊：
影响因子：
--
通讯作者：
Qiang-Lin Hu;Shi-Bing Liu
中科院分区：
文献类型：
--
作者：
Qiang-Lin Hu;Shi-Bing Liu
从强激光脉冲在逐渐电离等离子体中传输的色散关系出发，讨论了超短强激光脉冲与气体靶相互作用时电离引起的频率调制。分析了频率调制与电离率、等离子体频率变化以及原子（离子）极化的关系。数值结果表明，在高频下，原子（离子）的极化对激光频率的调制作用比等离子体频率的变化更大，并且在激光脉冲的不同位置，激光频率的变化是不同的。
Based on the dispersion relation of intense laser pulse propagating in gradually ionized plasma, this paper discusses the frequency modulation induced by ionization of an ultra-short intense laser pulse interacting with a gas target. The relationship between the frequency modulation and the ionization rate, the plasmas frequency variation, and the polarization of atoms (ions) is analysed. The numerical results indicate that, at high frequency, the polarization of atoms (ions) plays a more important role than plasma frequency variation in modulating the laser frequency, and the laser frequency variation is different at different positions of the laser pulse.