19 October 2016 Research of target uniform illumination on SG-III laser facility
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Proceedings Volume 10152, High Power Lasers, High Energy Lasers, and Silicon-based Photonic Integration; 101520Z (2016) https://doi.org/10.1117/12.2246918
Event: International Symposium on Optoelectronic Technology and Application 2016, 2016, Beijing, China
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.
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Rui Zhang, Huaiting Jia, Yuanchao Geng, Ping Li, Lanqin Liu, Xiaocheng Tian, Haoyu Yuan, Chen Fan, Jingqin Su, Dongxia Hu, Qihua Zhu, Wanguo Zheng, "Research of target uniform illumination on SG-III laser facility", Proc. SPIE 10152, High Power Lasers, High Energy Lasers, and Silicon-based Photonic Integration, 101520Z (19 October 2016); doi: 10.1117/12.2246918; https://doi.org/10.1117/12.2246918
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