Interference effects in the conical emission of a femtosecond filament in fused silica

被引：11
|
作者：
Dormidonov, A. E. [1 ]
Kandidov, V. P. [1 ]
Kompanets, V. O. [2 ]
Chekalin, S. V. [2 ]
机构：
[1] Moscow MV Lomonosov State Univ, Fac Phys, Moscow 119991, Russia
[2] Russian Acad Sci, Inst Spect, Troitsk 142190, Moscow Region, Russia
来源：
JETP LETTERS | 2010年 / 91卷 / 08期
基金：
俄罗斯基础研究基金会;
关键词：
WHITE-LIGHT LASER; SUPERCONTINUUM GENERATION; OPTICAL MEDIA; DISPERSIVE MEDIA; PULSES; AIR; PROPAGATION;
D O I：
10.1134/S0021364010080023
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
It is shown both experimentally and theoretically that interference effects play the key role in the formation of frequency-angular spectrum of the filament conical emission. For the first time, we investigated experimentally the transformation of the conical emission frequency-angular spectrum with an increase in the filament length inside fused silica. We discovered the appearance of fine structure of the conical emission rings produced by lengthy filament. It is shown that the conical emission frequency-angular spectrum is produced by interference of coherent radiation from one or several moving point sources in the filament. The shape of the conical emission spectrum depends on the medium material dispersion, the spectrum structure is determined by length and relative location of filament emitting regions.
引用
收藏
页码：373 / 377
页数：5
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