激光波长对单阶谐波增强的影响

Effect of Laser Wavelength on Enhancement of Single-order Harmonic

理论研究了激光波长对单阶谐波增强的影响。结果表明,当采用短波长激光场时,单阶谐波增强比率下降。理论分析表明,单阶谐波的强度与2方面有关。其一为谐波辐射能量峰上的折叠结构,使单阶谐波得到增强。其二为多重谐波辐射能量峰之间的干涉减小现象,使单阶谐波增强的比率下降。

The effect of laser wavelength on the enhancement of single-order harmonic has been theoretically investigated.It is shown that when the shorter wavelength laser field is used,the enhanced ratio of the single-order harmonic is decreased.Theoretical analyses show that the intensity of single-order harmonic is related to two aspects.One is the folded structure on the harmonic emission peak,which leads to the enhancement of the single-order harmonic.The other one is the interference reduction between different harmonic emission peaks,which makes the enhanced ratio of the single-order harmonic decrease.