Phase Synchronism in the Generation of Harmonics in Gas Taking into Account Changes in the Wave Vector Detuning during the Propagation of an Intense Femtosecond Laser Pulse

被引：1

作者：

Lvov, K. V. ^{[1
,2
]}

Stremoukhov, S. Yu. ^{[1
,2
]}

机构：

[1] Moscow MV Lomonosov State Univ, Moscow, Russia

[2] Kurchatov Inst, Natl Res Ctr, Moscow 123182, Russia

来源：

BULLETIN OF THE LEBEDEV PHYSICS INSTITUTE | 2024年 / 51卷 / SUPPL 5期

基金：

俄罗斯科学基金会;

关键词：

harmonic generation; phase synchronism; gas media; femtosecond laser fields; numerical modeling; RADIATION; IONIZATION; PRESSURE; FIELD;

D O I：

10.3103/S1068335624601481

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

An alternative approach to determining the conditions of phase synchronism in the generation of harmonics in gases is proposed to take into account changes in the wave vector detuning during the propagation of an intense femtosecond laser pulse. Based on a numerical study of the third-harmonic generation by an argon medium, laws of scaling laser radiation absorption in the medium and of the phase modulation of spectral field components, which link macroparameters of interaction (pressure, intensity, and degree of medium ionization), have been identified. The possibility was investigated of increasing the third harmonic signal by increasing the gas jet pressure while keeping absorption at a low level.

引用

页码：S408 / S415

页数：8