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[1] 刘辉[2] 冯立强[1,2] LIU Hang;LIU Hui;FENG Li-Qiang(School of Chemical and Environmental Engineering, Liaoning University of Technology, Jinzhou 121001, China;College of Science, Liaoning University of Technology, Jinzhou 121001, China)

机构地区：[1]辽宁工业大学化学与环境工程学院,锦州121001 [2]辽宁工业大学理学院,锦州121001

出　　处：《四川大学学报（自然科学版）》2020年第6期1121-1124,共4页Journal of Sichuan University(Natural Science Edition)

基　　金：国家自然科学基金(11504151);辽宁省自然科学基金;辽宁省教育厅基础研究项目。

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.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.

关 键 词：高次谐波 单阶谐波增强 激光强度 谐波辐射干涉 

分 类 号：O562.4[理学—原子与分子物理]