“神光Ⅱ”驱动器空心平顶光束的设计

Design of Flat-top Beam with a Cenrtal Dip for"SG Ⅱ"Laser Driver

为改善“神光Ⅱ”驱动器光束的近场均匀性，提出并设计了特殊的空心平顶光束．以抑制衍射调制。光束的设计采用新颖的硬边波纹光阑截取和空间滤波器光滑化的方法．文中给出了理论计算结果并研究了所设计光束的基本特征．

In order to improve the near field uniformity of the 'SG Ⅱ'laser beam, we haveproposed and designed a special beam,called flat-top centered dip beam.The beam isgenerated by a combination of a hard edge serrated aperture and a spatial filter.In the paperthe calculated results and the inveStigated characteristics of the designed beam are alsogiven.