Femtosecond pulse self-shortening in Kerr media: role of modulational instability in the spectrum formation

被引:3
|
作者
Grudtsyn, Ya. V. [1 ]
Koribut, A. V. [1 ,2 ]
Mikheev, L. D. [1 ,3 ]
Trofimov, V. A. [4 ]
机构
[1] Russian Acad Sci, PN Lebedev Phys Inst, Leninsky Prosp 53, Moscow 119991, Russia
[2] Moscow Inst Phys & Technol, Inst Skii Per 9, Dolgoprudnyi 141700, Moscow Region, Russia
[3] Natl Res Nucl Univ MEPhI, Kashirskoe Sh 31, Moscow 115409, Russia
[4] Moscow MV Lomonosov State Univ, Moscow 119991, Russia
关键词
self-shortening; femtosecond pulses; multiple filamentation; modulational instability; nonlinear Schrodinger equation; SILICON DIOXIDE; OPTICAL PULSES; FUSED-SILICA; 532; NM; COMPRESSION; ABSORPTION; FILAMENTATION; GENERATION; RADIATION; DURATION;
D O I
10.1070/QEL16670
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
The mechanism of femtosecond pulse self-shortening in thin optical materials with Kerr nonlinearity is investigated. The experimentally observed spectral-angular distribution of the radiation intensity on the exit surface of a 1-mm-thick fused silica sample is compared with the results of numerical simulation based on solving the nonlinear Schrodinger equation for an electromagnetic wave with a transverse perturbation on the axis. Qualitative agreement between the calculated and experimental results confirms the hypothesis about the transient regime of multiple filamentation as a mechanism of femtosecond pulse self-shortening.
引用
收藏
页码:306 / 312
页数:7
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