摘要
采用数值模拟的方法,研究了强激光在大气传输过程中产生的稳态热晕效应.计算和分析了有风时稳态热晕效应对轴上光强以及远场能量分布的影响.结果表明,Nc越大,热晕效应越明显;在线性衰减、由横向风引起的散焦和扩散以及自聚焦的补偿的作用下,光束在垂直于风的方向上显著地扩展并聚焦;若不考虑衍射效应,准直光束在风的方向上聚焦,光斑横向尺寸扩展,且光斑分布呈月牙形.
Steady-state thermal blooming induced when high power laser transmits in the atmosphere is studied by numerical simulation. The influences of epaxial light intensity and energy distribution in far field caused by steadystate thermal blooming with wind are calculated and analysed. The results show that the bigger Nc is, the more obvious thermal blooming is; laser beam will obviously expends and focuses to the vertical direction of wind by linear attenuation, defocusing and diffusion generated by transverse wind and the compensation of self-focusing; collimated beam will focus in the direction of wind, the transverse dimension of light spot will spread, and the distribution of light spot will assumes the crescent moon shape without diffraction effect.
出处
《淮阴师范学院学报（自然科学版）》
CAS
2008年第4期270-274,共5页
Journal of Huaiyin Teachers College;Natural Science Edition
关键词
强激光
稳态热晕
数值模拟
high energy laser
steady-state thermal blooming
numerical simulation
