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利用数值模拟的方法,对三种不同发射口径情况下准直强激光水平传输稳态热晕效应的自适应光学相位补偿进行了计算。结果表明,定标参量N_D/N_(FB)可充分描述其相位补偿的效果,且对理想柔形镜及实际自适应光学系统相位补偿而言,其不稳定性定标参量的阈值分别为6.0、0.35。当N_D/N_(FB)小于阈值时,相位补偿效果理想且随N_D/N_(FB)的改变Strehl比变化平缓;而当N_D/N_(FB)大于阈值时,由于相位补偿不稳定性的增强,补偿效果迅速变差。
By using the method of numerical simulation, the adaptive optical phase compensation of the steady-state thermal-halo effect of the collimated laser beam at three different transmitting apertures was calculated. The results show that the calibration parameter N_D / N_ (FB) can fully describe the effect of phase compensation. For the phase compensation of ideal compliant lens and actual adaptive optics system, the thresholds of instability calibration parameters are 6.0 , 0.35. When N_D / N_ (FB) is less than the threshold, the phase compensation effect is ideal and the Strehl ratio changes gently with the change of N_D / N_ (FB). When N_D / N_ (FB) is greater than the threshold, , The compensation effect is rapidly deteriorating.