摘要
编制了四维仿真程序 ,用以研究光束控制系统中的热效应对强激光传输的影响。作为数值模拟例 ,用Strehl比、可聚焦能力 (即 86 .5 %环围功率半径 )、像散参数和光束重心偏移表征远场光束质量 ,研究了初始场分布为高斯和平顶分布的光束通过光束控制系统传输时热效应对远场光束质量的影响。结果表明 ,远场光束质量与初始场的空间分布有关 。
A four-dimension simulation code is developed,which enables us to study the thermal effect of high-power lasers propagating through a beam control system. As illustrated examples,the thermal effects of high-power lasers with initial Gaussian and flat-topped profiles in passage through the beam control system on the beam quality in the far field characterized by the Strehl ratio,the focussiablity(i.e.,radius of the encircled 86.5% power),astigmatism parameter and shift of the beam gravity are studied. It is shown that the beam quality in the far field depends on the initial field distribution,and is degraded with increasing emissive power.
出处
《激光技术》
CAS
CSCD
北大核心
2003年第6期514-516,596,共4页
Laser Technology
基金
江西省自然科学基金
国家高技术 86 3 80 2资助项目
关键词
热效应
光束控制系统
强激光
远场光束质量
thermal effect
beam control system
high-power laser
beam quality in the far field
