PREPULSE SUPPRESSION FOR HIGH-ENERGY ULTRASHORT PULSES USING SELF-INDUCED PLASMA SHUTTERING FROM A FLUID TARGET

被引:45
|
作者
BACKUS, S [1 ]
KAPTEYN, HC [1 ]
MURNANE, MM [1 ]
GOLD, DM [1 ]
NATHEL, H [1 ]
WHITE, W [1 ]
机构
[1] LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550
关键词
D O I
10.1364/OL.18.000134
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
The technique of self-induced plasma shuttering can be used to suppress prepulse energy from an ultrashort pulse. If a femtosecond pulse is incident upon a transparent target, the leading edge passes through while the peak reflects owing to ionization breakdown at the surface. We describe a fluid jet, enclosed in a vacuum chamber, that allows this technique to be used at high repetition rates. The jet has excellent stability and a fast (approximately 500 mus) recovery time. At normal incidence, we demonstrate a reflection efficiency of 70% with a prepulse-to-main-pulse energy suppression ratio of > 10, while at Brewster incidence we measure a reflection efficiency of 38% with a suppression ratio of nearly 400.
引用
收藏
页码:134 / 136
页数:3
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