Nonlinear Scattering of 248 nm Wavelength Light in High-Pressure SF6 and CH4 Gases for the Temporal Compression of a 20 ns KrF Laser Pulse

被引：0

作者：

Zvorykin, Vladimir D. ^{[1
]}

Metreveli, Gocha E. ^{[1
]}

Smetanin, Igor' V. ^{[1
]}

Shutov, Alexey V. ^{[1
]}

Ustinovskii, Nikolay N. ^{[1
]}

Veliev, Polad V. ^{[1
]}

机构：

[1] P N Lebedev Phys Inst, Leninskii Prospekt 53, Moscow 119991, Russia

来源：

PHOTONICS | 2024年 / 11卷 / 01期

基金：

俄罗斯科学基金会;

关键词：

KrF laser pulse compression; stimulated Brillouin and Raman scattering in SF6 and CH4; theory of soliton-like pulse compression; STIMULATED BRILLOUIN-SCATTERING; RAMAN-SCATTERING; GARPUN-MTW; AMPLIFICATION; RADIATION; GENERATION; COMPETITION; FIELD;

D O I：

10.3390/photonics11010039

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The nonlinear compression of narrowband (Delta nu approximate to 0.2 cm(-1)) 20 ns KrF laser pulses in SF6 at 10 atm and in CH4 at 50 atm pressure was studied. Both SBS and SRS optically phase-conjugated backward-reflected radiation was registered with an energy reflectivity of 10-14% in SF6 and CH4. In SF6, the SBS pulses gradually shortened from 10 ns to 2-3 ns with a decrease in pumping to the SBS threshold of similar to 10 mJ, while the SRS pulse had the shortest length of 30-60 ps for the maximal pumping of 120 mJ and broadened near the SRS threshold of similar to 30 mJ. For the SRS pulse energy, the similar to 2 mJ peak power 5 x 10(7) W was tenfold higher than the pump power. The theoretical model predicted a soliton-like SRS pulse compression to a temporal length of the order of the vibrational relaxation time. There was no pulse compression of backward SBS and SRS radiation in CH4, while, in the forward direction, SRS pulses shortened to 3-4 ns at reduced pumping.

引用

页数：13