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Proceedings Paper

Research of target uniform illumination on SG-III laser facility
Author(s): Rui Zhang; Huaiting Jia; Yuanchao Geng; Ping Li; Lanqin Liu; Xiaocheng Tian; Haoyu Yuan; Chen Fan; Jingqin Su; Dongxia Hu; Qihua Zhu; Wanguo Zheng
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Paper Abstract

In the research of inertial confinement fusion, laser plasma interaction (LPI) is becoming a key problem that affects ignition. Here, multi-frequency modulation (Multi-FM) smoothing by spectral dispersion (SSD), continuous phase plate (CPP) and polarization smoothing (PS) were experimentally studied and equipped on SG-III laser facility. After using these technologies, the focal spots of SG-III laser facility can be adjusted, controlled and repeated accurately. Experiments on SG-III laser facility indicate when the number of color cycles adopts 1, imposing SSD with 3.3 times diffraction limit (TDL) did not lead to pinhole closure in the spatial filters of the preamplifier and the main amplifier with 30-TDL pinhole size. The nonuniformity of the focal spots using Multi-FM SSD, CPP and PS drops to 0.18, comparing to 0.26 with CPP+SSD, and 0.84 with CPP and wedged lens. Polarization smoothing using flat birefringent plate in the convergent beam of final optics assembly (FOA) was studied.

Paper Details

Date Published: 19 October 2016
PDF: 9 pages
Proc. SPIE 10152, High Power Lasers, High Energy Lasers, and Silicon-based Photonic Integration, 101520Z (19 October 2016); doi: 10.1117/12.2246918
Show Author Affiliations
Rui Zhang, China Academy of Engineering Physics (China)
Huaiting Jia, Laser Fusion Research Ctr. (China)
Yuanchao Geng, Laser Fusion Research Ctr. (China)
Ping Li, Laser Fusion Research Ctr. (China)
Lanqin Liu, Laser Fusion Research Ctr. (China)
Xiaocheng Tian, Laser Fusion Research Ctr. (China)
Haoyu Yuan, Laser Fusion Research Ctr. (China)
Chen Fan, Laser Fusion Research Ctr. (China)
Jingqin Su, Laser Fusion Research Ctr. (China)
Dongxia Hu, Laser Fusion Research Ctr. (China)
Qihua Zhu, Laser Fusion Research Ctr. (China)
Wanguo Zheng, Laser Fusion Research Ctr. (China)

Published in SPIE Proceedings Vol. 10152:
High Power Lasers, High Energy Lasers, and Silicon-based Photonic Integration
Lijun Wang; Zhiping Zhou, Editor(s)

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