Generation of Intense Near and Mid-Infrared Femtosecond Radiation (1.2-2.4 μm) with the Use of the Broadband Parametric Down-Conversion in a Type-II BBO Crystal Pumped by a Ti: Sapphire Laser and Its Application for the Generation of Terahertz Radiation in Organic Crystals

被引：2

作者：

Suleimanova, D. Z. ^{[1
]}

Zhidovtsev, N. A. ^{[1
]}

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

机构：

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

来源：

JETP LETTERS | 2022年 / 115卷 / 02期

基金：

俄罗斯科学基金会;

关键词：

PULSES; DSTMS; DAST;

D O I：

10.1134/S0021364022020096

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A two-stage optical parametric amplifier is fabricated on the basis of type-II BBO crystals pumped by the intense radiation of a Ti:sapphire laser. Femtosecond radiation tunable from the near to mid-infrared range at wavelengths of 1.1-1.6 mu m (signal wave) and 1.6-2.6 mu m (idler wave) is generated with a total energy conversion efficiency of 8%. The output energy of generated infrared pulses at wavelengths of 1.3 and 2 mu m is 840 and 280 mu J, respectively. It is experimentally demonstrated that terahertz radiation can be subsequently generated in a DAST organic crystal using the optical rectification process under the pumping by generated mid-infrared radiation. The developed model of the generation of terahertz radiation shows that the optical- terahertz conversion efficiency to 3.6% can be increased by chirping femtosecond mid-infrared radiation (-2 mu m) to 200 fs.

引用

页码：63 / 70

页数：8