Design and performance of final optics assembly in SG-II Upgrade laser facility

被引：28

作者：

Jiao, Zhaoyang ^{[1
]}

Shao, Ping ^{[1
]}

Zhao, Dongfeng ^{[1
]}

Wu, Rong ^{[1
]}

Ji, Lailin ^{[2
]}

Wang, Li ^{[1
]}

Xia, Lan ^{[2
]}

Liu, Dong ^{[2
]}

Zhou, Yang ^{[1
]}

Ju, Lingjie ^{[1
]}

Cai, Zhijian ^{[1
]}

Ye, Qiang ^{[1
]}

Qiao, Zhanfeng ^{[1
]}

Hua, Neng ^{[1
]}

Li, Qiang ^{[1
]}

Pan, Wei ^{[1
]}

Ren, Lei ^{[1
]}

Sun, Mingying ^{[1
]}

Zhu, Jianqiang ^{[1
]}

Lin, Zunqi ^{[1
]}

机构：

[1] Chinese Acad Sci, Shanghai Inst Opt & Fine Mech, Natl Lab High Power Laser & Phys, Shanghai 201800, Peoples R China

[2] Shanghai Inst Laser Plasma, Shanghai 201800, Peoples R China

来源：

HIGH POWER LASER SCIENCE AND ENGINEERING | 2018年 / 6卷

关键词：

final optics assembly; high power laser facility; inertial confinement fusion; MEGAJOULE;

D O I：

10.1017/hpl.2018.8

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

In high power laser facility for inertial confinement fusion research, final optics assembly (FOA) plays a critical role in the frequency conversion, beam focusing, color separation, beam sampling and debris shielding. The design and performance of FOA in SG-II Upgrade laser facility are mainly introduced here. Due to the limited space and short focal length, a coaxial aspheric wedged focus lens is designed and applied in the FOA configuration. Then the ghost image analysis, the focus characteristic analysis, the B integral control design and the optomechanical design are carried out in the FOA design phase. In order to ensure the FOA performance, two key technologies are developed including measurement and adjustment technique of the wedged focus lens and the stray light management technique based on ground glass. Experimental results show that the design specifications including laser fluence, frequency conversion efficiency and perforation efficiency of the focus spot have been achieved, which meet the requirements of physical experiments well.

引用

页数：11

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