用等腰三角形位相光栅进行相干光并束的研究  

Study on laser beam combination by means of isosceles triangle phase grating

作　　者：王景全[1] 罗铂靓[1] 张志友[1] 方亮[1] 杜惊雷[1] 

机构地区：[1]四川大学物理科学与技术学院纳光子技术研究所,成都610064

出　　处：《激光技术》2007年第6期561-564,共4页Laser Technology

基　　金：国家自然科学基金资助项目(6067602460376021)

摘　　要：为了满足未来惯性约束激光核聚变(ICF)的快速点火装置对高能量激光束的要求,提出并特殊设计了一种可用于ICF系统中相干并束的等腰三角形位相光栅。模拟计算和分析的结果表明,这种等腰三角形位相光栅对4束相干激光并束的效率理论上可以达到90.2%,比普通的二元达曼型位相光栅的衍射效率高22个百分点。相对而言,该光栅具有加工难度低、误差宽容度大等优点,有较强的实用前景。The technology of beam combination is an effective method to obtain high power and quality beams. Aiming at the demand of high power beams in the device of ICF in the future, an isosceles triangle phase grating was designed. Simulated and analyzed results indicated that the combination efficiency of four incident beams reached 90.2% ,which was 22% higher than the efficiency of Dammann phase grating. Besides, the processing of the isosceles triangle phase grating was not difficult. So it is important and practical perspective in the future.

关 键 词：衍射光栅 相干并束 等腰三角形位相光栅 纵向随机误差 高度误差 横向误差 

分 类 号：O436.1[机械工程—光学工程]