Dynamics of ultrashort pulse focusing

被引：0
|
作者：
Frolenkova, M. V. [1 ]
Tolmachev, Yu. A. [1 ]
机构：
[1] St Petersburg State Univ, St Petersburg 198504, Old Peterhof, Russia
来源：
BULLETIN OF THE LEBEDEV PHYSICS INSTITUTE | 2009年 / 36卷 / 12期
关键词：
ultrashort pulse diffraction; delta-pulse; impulse response; DIFFRACTION;
D O I：
10.3103/S1068335609120057
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The method for studying the transformation of an ultrashort pulse of a spherical wave in the vicinity of the focus was developed. It was shown that the impulse response of the circular aperture contains two components: the transmitted one "cut" by the aperture from the incident wave and the toroidal edge one. Simple algebraic relations describing the propagation process were derived and corresponding software was developed. An example of a change in the pulse shape with Gaussian envelope is given. It was shown that pulses propagating with velocity nu > c, one of which overtakes the primary wave, are formed on the system axis.
引用
收藏
页码：359 / 361
页数：3
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