连续强激光稳态热晕效应的数值模拟研究

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.

Numerical Simulation of Steady-state Thermal Blooming about High Continuous Power Laser

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 steady-state 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 ...