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热晕效应是高能激光大气传输最重要的非线性效应之一。利用激光大气传输四维仿真程序,针对高能固体脉冲激光大气传输的非线性热晕效应,采用常规自适应光学系统与随机并行梯度算法自适应光学系统对其相位补偿进行了数值模拟和分析。结果表明:当脉冲宽度1 ms,重复频率10 Hz,单脉冲发射功率500 k W时,常规自适应光学系统补偿效果较好;当脉冲发射功率增加或者重复频率增加时,随机并行梯度下降算法自适应光学系统补偿效果较好。
Thermal halo effect is one of the most important non-linear effects of high-energy laser atmospheric transmission. A four - dimensional simulation program of laser atmospheric transmission was used to simulate and analyze the phase compensation of conventional adaptive optics system and stochastic parallel gradient algorithm adaptive optics system based on the non - linear thermal halo effect of high energy solid pulsed laser atmospheric transmission. The results show that when the pulse width is 1 ms, the repetition frequency is 10 Hz and the single-pulse transmission power is 500 kW, the conventional adaptive optical system has a better compensation effect. When the pulse transmission power is increased or the repetition frequency is increased, the random parallel gradient descent algorithm To adapt to the optical system better compensation.