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强激光在非均匀光程中传输时,大气路径中分子的吸收系数不再是常数,利用内插法得出了中纬度夏季模式的分子吸收系数随海拔高度的变化规律。强激光传输会同时受到大气湍流效应和热晕效应的共同影响,这严重影响了强激光传输的效能,而采用多束强激光传输方法可以减小这些效应的影响。根据波动光学理论,建立了三束脉冲激光在湍流和热晕相互作用下的数学模型。数值结果表明:该方法对光强起伏、光斑分裂和光束扩展等现象有较好的校正效果。
When the intense laser is transmitted in the non-uniform optical path, the absorption coefficients of the molecules in the atmospheric path are no longer constant. The variation law of molecular absorption coefficient with altitude in mid-latitude summer mode is obtained by interpolation. Strong laser transmission will be affected by both atmospheric turbulence and thermal halo, which seriously affects the performance of strong laser transmission. However, the effect of these effects can be reduced by adopting multi-beam intense laser transmission. According to the theory of wave optics, a mathematical model of the three-pulse pulsed laser is established under the interaction of turbulence and thermal halo. The numerical results show that this method has a good correction effect on the phenomenon of light intensity fluctuation, spot splitting and beam expansion.