非线性啁啾波形优化获得超短阿秒脉冲  

Nonlinear chirp waveform optimization for obtaining ultra-short attosecond pulses

作　　者：袁泉[1] 冯立强[1] YUAN Quan;FENG Li-Qiang(College of Science,Liaoning University of Technology,Jinzhou 121001,China)

机构地区：[1]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）》2021年第6期93-96,共4页Journal of Sichuan University(Natural Science Edition)

基　　金：辽宁省自然科学基金面上项目(2019-MS-167)。

摘　　要：本文通过调控非线性啁啾波形,提出了运用两种非线性啁啾组合波形延伸谐波截止能量以及增强谐波强度的方法.研究结果表明,适当调节组合场的二阶和三阶啁啾参数、啁啾延迟以及其它激光参数后,激光波形得到最佳优化.在最佳波形驱动下,谐波截止能量和辐射强度明显增大,进而我们可以获得脉宽在39 as的孤立脉冲.By regulating the nonlinear chirp waveforms, a method to extend the harmonic cutoff and enhance the harmonic intensity by combining two kinds of nonlinear chirp forms has been proposed. The results show that by appropriately adjusting the second-order and third-order chirp parameters, the chirp delays and the other laser parameters of the combined pulse, the laser waveforms can be optimized. Driven by the optimal waveforms, the harmonic cutoff and harmonic radiation intensity can be significantly increased, which can lead to the generation of the isolated pulses with the durations of 39 as.

关 键 词：高次谐波 非线性啁啾场 激光波形调控 孤立阿秒脉冲 

分 类 号：O562.4[理学—原子与分子物理]