Optical Harmonics Generation under the Interaction of Intense (up to 1014 W/cm2) Mid-Infrared Femtosecond Laser Radiation of a Fe:ZnSe Laser System with a Dense Laminar Gas Jet

被引：8

作者：

Rumiantsev, B., V ^{[1
]}

Mikheev, K. E. ^{[1
]}

Pushkin, A., V ^{[1
]}

Migal, E. A. ^{[1
]}

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

Potemkin, F., V ^{[1
]}

机构：

[1] Lomonosov Moscow State Univ, Fac Phys, Moscow 119991, Russia

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

来源：

JETP LETTERS | 2022年 / 115卷 / 07期

基金：

俄罗斯基础研究基金会;

关键词：

ATTOSECOND; PLASMA; FIELD; SOFT;

D O I：

10.1134/S0021364022100277

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Low-order (fifth, seventh, and ninth) harmonics have been generated under the interaction of intense (I similar to 10(14) W/cm(2)) femtosecond mid-infrared radiation of a laser system based on a Fe:ZnSe crystal (wavelength is 4.55 mu m, pulse duration by the FWHM level of intensity is 160 fs, and the pulse energy is up to 3.5 mJ) with an argon jet (pressure is up to 10 bar) in the tunneling ionization regime (Keldysh parameter is gamma = 0.2). The maximum energy efficiencies of the 5th, 7th, and 9th harmonic generation are 2 x 10(-7), 6 x 10(-9), and 3 x 10(-10), respectively. It has been established that nonlinear effects of propagation of generating radiation under an increase in the pressure of the gas jet begin to significantly affect the process of generation.

引用

页码：390 / 395

页数：6