HARMONIC-GENERATION BY AN INTENSE LASER-PULSE IN NEUTRAL AND IONIZED-GASES

被引：82
作者：
LIU, X [1 ]
UMSTADTER, D [1 ]
ESAREY, E [1 ]
TING, A [1 ]
机构：
[1] USN,RES LAB,BEAM PHYS BRANCH,WASHINGTON,DC 20375
来源：
IEEE TRANSACTIONS ON PLASMA SCIENCE | 1993年 / 21卷 / 01期
基金：
美国国家科学基金会;
关键词：
D O I：
10.1109/27.221106
中图分类号：
O35 [流体力学]; O53 [等离子体物理学];
学科分类号：
070204 ; 080103 ; 080704 ;
摘要：
Reported are the results of a harmonic generation experiment in a simple gas (hydrogen) using 1-ps, 1-mum laser pulses with a range of intensities extending from below to far above the laser ionization saturation threshold. The scaling with intensity above saturation of the third harmonic generated by a single laser-pulse in a filled gas cell is observed to not fit with a simple model that takes into consideration volume ionization effects alone. In another experiment, a pump-probe type, an upper limit on the conversion efficiency of third harmonic generation in a preformed plasma is determined. It is found to be in agreement with the efficiency predicted by a relativistic harmonic generation theory.
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页码：90 / 94
页数：5
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