高功率激光装置的线性传输特性  

Linear propagation performance in high power laser facility

作　　者：张颖[1] 刘兰琴[1] 王文义[1] 耿远超[1] 黄晚晴[1] 朱启华[1] 

机构地区：[1]中国工程物理研究院激光聚变研究中心,四川绵阳621900

出　　处：《强激光与粒子束》2014年第8期96-99,共4页High Power Laser and Particle Beams

基　　金：中国工程物理研究院科学技术发展基金项目(2013B0401067)

摘　　要：在菲涅耳数的基础上重新定义了衍射特征量,并将其定义扩展至聚焦或发散光路,定义了一个光学系统中各光学元件衍射特征量的符号。通过全新的定义和扩展,研究了波前畸变对近场调制度的影响以及正弦调频光谱色散平滑光束衍射传输引入的幅频调制的大小。以神光-Ⅲ主机主放大级为例,研究了元件波前畸变对近场调制度的影响以及正弦调频光谱色散平滑光束衍射传输引入的幅频调制的大小。衍射特征量与能流分布F相结合,可以作为评价高功率激光装置线性传输效应的一项受限指标,指导高功率激光装置的设计。The diffraction character is redefined based on Fresnel number. This new definition is extended to focusing or dif- fusing optical path. The sign of the new diffraction character is defined for each optical element in a laser system. According to these definitions and extending, the effect of phase aberration on near-field modulation and the effect of linear diffraction on FM- to-AM are studied. The linear diffraction effect on high power laser facility can be evaluated by the combination of the new diffrac- tion character and the energy fluence.

关 键 词：衍射 菲涅耳数 线性传输 光谱色散匀滑 幅频效应 

分 类 号：TN241[电子电信—物理电子学]