摘要
在惯性约束聚变系统中,改进G-S算法设计的连续相位板能够对波前发生畸变的激光进行束匀滑处理,以改善远场分布。由于连续相位板对不同畸变状态的波前进行处理后的效果不一样,因此针对连续相位板的束匀滑容差能力进行了系统分析。鉴于畸变光束的传输特性,采用波前均方根梯度来量化波前畸变量,定量计算了不同畸变光经过匀滑处理后的远场光强分布情况。并比较了不同入射畸变光通过连续相位板后的远场焦斑顶部均匀性,结果表明:当入射波前畸变的均方根梯度小于0.32wave/mm时,连续相位板具有很好的束匀滑效果。
In the inertial confinement fusion （ICF） system, continuous phase plate （CPP） designed by improved G S algo- rikhm can be used to improve the far=field distribution of distorted wave-front. Since the smoothing results of CPP for different distorted wave-fronts are different, the smoothing tolerance ability of CPP is analyzed systematically. According to the transmis sion characteristics of the distorted laser beams, root mean square （RMS） gradient of wave-front is used to quantify the wave- front distortion. And the far-field intensity distributions of different distorted beams which have translated through CPP are ealcu lated by the numerical method. By comparing the uniformity of far-field focal spot after smoothing by CPP, a conclusion can be gotten that when the RMS gradient is under 0.32 wave/mm, CPP has good beam smoothing ability.
出处
《强激光与粒子束》
EI
CAS
CSCD
北大核心
2013年第3期627-632,共6页
High Power Laser and Particle Beams
基金
国家高技术发展计划项目
关键词
连续相位板
容差
波前畸变
均方根梯度
束匀滑
continuous phase plate
toleranee
wave-front distortion
RMS gradient
beam smoothing
