Open AccessExperimental investigation on beam smoothing by combined spectral dispersion and lens array technology
Author(s) -
Youen Jiang Youen Jiang,
Shenlei Zhou Shenlei Zhou,
Rong Wu,
J. Li,
Xuechun Li Xuechun Li,
Z. Lin
Publication year - 2013
Publication title -
chinese optics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.617
H-Index - 37
ISSN - 1671-7694
DOI - 10.3788/col201311.081404
Subject(s) - optics , dispersion (optics) , smoothing , lens (geology) , beam (structure) , physics , materials science , computer science , computer vision
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 3ω spectral dispersion with a bandwidth of 270 GHz and a line dispersion that is 24.9 times the beam's diffractionlimited 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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