Experimental investigation on beam smoothing by combined spectral dispersion and lens array technology

被引：10
|
作者：
Jiang, Youen [1 ]
Zhou, Shenlei [1 ]
Wu, Rong [1 ]
Li, Jinghui [1 ]
Li, Xuechun [1 ]
Lin, Zunqi [1 ]
机构：
[1] Chinese Acad Sci, Shanghai Inst Opt & Fine Mech, Natl Lab High Power Laser Phys, Shanghai 201800, Peoples R China
来源：
CHINESE OPTICS LETTERS | 2013年 / 11卷 / 08期
基金：
中国国家自然科学基金;
关键词：
INERTIAL CONFINEMENT FUSION; ILLUMINATION; PERFORMANCE;
D O I：
10.3788/COL201311.081404
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
The experimental performance of beam smoothing by combined one-dimensional (1D) spectral dispersion and lens array (LA) technology is presented, as applied in the ninth beam of SG-II. Using 3 omega spectral dispersion with a bandwidth of 270 GHz and a line dispersion that is 24.9 times the beam's diffraction-limited width decreases the focal spot non-uniformity of 80% energy concentration from 46% to 17%. The multiple-beam interference properties of the LA are theoretically and experimentally validated by spatial power spectral density analysis. Peak-spectra suppression ratios of 20 and 10 dB are achieved in the dispersion and orthogonal directions, respectively.
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页数：4
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