激光强度对单阶谐波增强的影响
Laser intensity effect on single-order harmonic enhancement
作者：刘航(辽宁工业大学化学与环境工程学院)；刘辉(辽宁工业大学理学院)；冯立强(辽宁工业大学化学与环境工程学院)
Author：LIU Hang(School of Chemical and Environmental Engineering, Liaoning University of Technology)；LIU Hui(College of Science, Liaoning University of Technology)；FENG Li-Qiang(School of Chemical and Environmental Engineering, Liaoning University of Technology)
收稿日期：2019-05-16 年卷（期）页码：2020,57(6):1121-1124
期刊名称：四川大学学报: 自然科学版
Journal Name：Journal of Sichuan University (Natural Science Edition)
关键字：高次谐波; 单阶谐波增强; 激光强度; 谐波辐射干涉
Key words：High-order harmonic generation; Single-order harmonic enhancement; Laser intensity; Interference of harmonic emission
基金项目：国家自然科学基金
中文摘要
通过调控激光波形, 理论上可以实现单阶谐波的增强. 随后, 当基频场强度增强时, 单阶谐波增强现象消失. 当控制场强度增强时, 单阶谐波增强倍率增大, 并且在某一特定光强下具有最大的增强值. 理论分析表明, 单阶谐波的增强现象不仅来源于谐波辐射的折叠区域, 并且与多重谐波辐射能量峰的干涉有关.
英文摘要
Through the laser waveform control, the enhancement of the single-order harmonic can be achieved. Further, when the fundamental laser intensity is increased, the enhancement of the single-order harmonic is disappeared. When the controlling laser intensity is increased, the enhanced ratio of the single-order harmonic can be enhanced and a maximum enhanced value can be found at the specific laser intensity. Theoretical analyses show that the enhancement of single-order harmonic is not only dependent on the folded structure of the harmonic emission process, but also related to the interference from different harmonic emission peaks.
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