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\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.

© 2013 Chinese Optics Letters

Experimental investigation of smoothing by spectral dispersion

Sean P. Regan, John A. Marozas, John H. Kelly, Thomas R. Boehly, William R. Donaldson, Paul A. Jaanimagi, Robert L. Keck, Terrance J. Kessler, David D. Meyerhofer, Wolf Seka, Stanley Skupsky, and Vladimir A. Smalyuk
J. Opt. Soc. Am. B 17(9) 1483-1489 (2000)

Beam smoothing by a diffraction-weakened lens array combining with induced spatial incoherence

Xiaohui Zhao, Yanqi Gao, Fujian Li, Lailin Ji, Yong Cui, Daxing Rao, Wei Feng, and Weixin Ma
Appl. Opt. 58(8) 2121-2126 (2019)

Experimental research on the influences of smoothing by spectral dispersion on the Technical Integration Line

Rui Zhang, Jingqin Su, Jianjun Wang, Lanqin Liu, Ping Li, Feng Jing, Xiaomin Zhang, Lixin Xu, and Hai Ming
Appl. Opt. 50(5) 687-695 (2011)

Performance of target irradiation in a high-power laser with a continuous phase plate and spectral dispersion

Xiujuan Jiang, Jinghui Li, Rong Wu, Zhengtao Zhu, Shenlei Zhou, and Zunqi Lin
J. Opt. Soc. Am. A 30(11) 2162-2168 (2013)

Performance of 1-THz-bandwidth, two-dimensional smoothing by spectral dispersion and polarization smoothing of high-power, solid-state laser beams

Sean P. Regan, John A. Marozas, R. Stephen Craxton, John H. Kelly, William R. Donaldson, Paul A. Jaanimagi, Douglas Jacobs-Perkins, Robert L. Keck, Terrance J. Kessler, David D. Meyerhofer, T. Craig Sangster, Wolf Seka, Vladimir A. Smalyuk, Stanley Skupsky, and Jonathan D. Zuegel
J. Opt. Soc. Am. B 22(5) 998-1002 (2005)