激光波形调控实现单阶谐波的增强

Enhancement of a single-order harmonic via laser waveform control

摘要:

通过对双色场激光波形的调控，理论上获得了单阶谐波的选择增强. 理论分析表明，单阶谐波的选择增强来源于‘W’波形下谐波辐射的折叠区域. 而且，第二束调控场的脉宽对‘W’波形下所形成的谐波辐射折叠区域有较大影响. 该研究为获得单阶谐波脉冲提供了一种新的方案，对激光光源的发展有帮助.

Abstract:

Through controlling the laser waveform of the two-color field, the selective enhancement of single-order harmonic is obtained theoretically. The theoretical analyses show that the selective enhancement of single-order harmonic is attributed to the folded region of the harmonic emission process in a specific 'W' waveform. Moreover, the folded region in the 'W' waveform structure is very sensitive to the pulse duration of the second controlling pulse. The present investigation provides a new method to obtain the single-order harmonic, which is helpful to the development of the laser source.