Collection Of theses on high power laser and plasma physics, 2013, 11 (1): 081404, Published Online: Jun. 2, 2017  

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

Author Affiliations
National Laboratory of High Power Laser Physics§Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
Abstract
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! 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.

Youen Jiang, Shenlei Zhou, Rong Wu, Jinghui Li, Xuechun Li, Zunqi Lin. Experimental investigation on beam smoothing by combined spectral dispersion and lens array technology[J]. Collection Of theses on high power laser and plasma physics, 2013, 11(1): 081404.

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