湍流作用下地基激光清除空间碎片的影响规律

Research on influence law of space debris removed by ground-based laser under atmospheric turbulence

在大气湍流作用下的基础上建立了地基激光辐照小尺度空间碎片在大气中的传输模型。利用该模型对高能脉冲激光远场激光参数与天顶角的关系作了仿真分析,论述了不同束散角下大气湍流对远场激光参数的影响规律;在此基础上,建立了高能脉冲激光在靶表面的冲量耦合模型,对铝靶在激光辐照下的冲量耦合系数与天顶角的关系进行了模拟分析,并讨论了受大气湍流影响的冲量耦合系数变化量与激光脉宽的关系。

The atmosphere transmission model of small scale space debris irradiated by ground-based laser was established under atmospheric turbulence. The relationship between far-field laser parameters of high energy pulse laser and the zenith angle was simulated and analyzed through the model,and the effects of atmospheric turbulence on far-field laser parameters were discussed under different laser divergence angles. On this basis,the impulse coupling model of high energy pulse laser on the target surface was set up,and the relationship between impulse coupling coefficient of aluminum target irradiated by laser and the zenith angle was simulated and analyzed. In addition,the relationship between the variation of impulse coupling coefficient affected by atmospheric turbulence and the laser pulse width was also discussed.