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

• 来源期刊: 中国光学快报（英文版）
• 年，卷（期）: 2013,（8）
• 页码范围: 53-56
• 页数: 4页
• 语种: 英文
• DOI: 10.3788/COL201311.081404

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 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.