Spatiotemporal dynamics of femtosecond filament induced plasma channel in fused silica

被引：15
作者：
Blonskyi, I. [1 ]
Brodyn, M. [1 ]
Kadan, V. [1 ]
Shpotyuk, O. [2 ]
Dmitruk, I. [1 ]
Pavlov, I. [1 ]
机构：
[1] NAS Ukraine, Inst Phys, Dept Photon Proc, UA-03028 Kiev, Ukraine
[2] Sci Res Co Carat, UA-79031 Lvov, Ukraine
来源：
APPLIED PHYSICS B-LASERS AND OPTICS | 2009年 / 97卷 / 04期
关键词：
LASER-PULSES; TIME; WATER; AIR; TRANSFORMATION; PROPAGATION;
D O I：
10.1007/s00340-009-3684-8
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Using microscopy techniques of femtosecond time-resolved optical polarigraphy and transient absorption, we have demonstrated reshaping of a filamented laser pulse propagating within the bulk of fused silica caused by expulsion of light from the plasma-occupied core area. Transformation of the axially symmetric pulse shape into an asymmetric double-bended structure was also found. Time- and space-resolved images of transient absorption tied to that of intensity distribution have been obtained. Based on the measured value of transient absorptance, it is concluded that the filament is refilled by energy flux from the reservoir.
引用
收藏
页码：829 / 834
页数：6
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