Author Affiliations
Abstract
1 中国科学院上海光学精密机械研究所,上海201800
2 上海大学精密机械学院,上海200436
3 中国工程物理研究院上海激光等离子体研究所,上海 201800
In order to realize less than 30μm the pointing error of the main laser and the large focal spot irradiation uniform on target surface better than 10% of the additional beam in ＂Shenguang- Ⅱ ＂ laser facility, a physical design of final optics assembly（FOA） has been proposed. Using finite element method, the static and dynamic states about the main machine components of FOA and the integral ICF target chamber are analyzed and the design of FOA is optimized. And using mathematics simulation, lens array has been analyzed and designed based on the focus lens about unit number, radius, thickness, long axis and short axis. Experimental results show that the pointing error of main laser on the target is 28.9μm , the large focal spot is 1000μm× 500 μm and the large focal spot irradiation uniform is 12.0%.
高功率激光驱动器 终端光学组件 均匀性 大焦斑 列阵透镜 High power laser facility Final optical assembly Uniform Large focal spot Lens array Collection Of theses on high power laser and plasma physics
2007, 5(1): 101
1 中国科学院,上海光学精密机械研究所,上海,201800
2 上海大学,精密机械学院,上海,200436
3 中国工程物理研究院,上海激光等离子体研究所,上海,201800
针对"神光-Ⅱ"装置第九路系统主激光瞄准精度小于等于30 μm和大焦斑辐照均匀性优于10%的要求,提出了靶场终端光学组件的设计结构.应用有限元法对组件关键机械元件和ICF靶室整体进行动静态分析,优化了设计参数.同时与聚焦透镜配合进行数值分析列阵透镜,确定了单元数、曲率和厚度以及单元长和宽等参数.经过实验测试,主激光瞄准精度达到28.9 μm,大焦斑辐照的形状为1 000 μm×500 μm,均匀性为12.0%.
高功率激光驱动器 终端光学组件 均匀性 大焦斑 列阵透镜
天津大学精密仪器与光电子工程学院,教育部光电信息技术科学重点实验室,天津 300072
为了克服放大自发辐射在飞秒激光放大器中对放大脉冲的影响,将增益介质掺钛蓝宝石晶体从腔内束腰位置处移至腔内光斑最大处是一个有效的办法.设计并实验了此种新型大焦斑直线形折叠腔.计算了腔内的光斑尺寸与腔结构参数的关系,得出了腔内光斑尺寸分部图,系统实验了输出功率与腔结构参数:曲面镜半径,输出耦合镜透射率,腔长等的关系,并进行了理论验证.本文为进一步将其做成新型、高效、低噪声再生放大器提供了必要的依据.
激光技术 再生放大 飞秒激光 大焦斑 折叠腔
