开展了脉冲激光大光斑辐照空间碎片冲量耦合特性研究, 即激光烧蚀光斑尺寸略小于碎片尺寸下的冲量耦合特性, 对比实验研究了平面状碎片在激光大光斑辐照和小光斑辐照下的冲量耦合特性, 以及大光斑辐照下光斑尺寸和形状因素对冲量耦合特性的影响规律, 并结合实验研究结论验证了理论研究的合理性。研究结果表明: 相同激光功率密度下小光斑辐照比大光斑辐照的冲量耦合系数高; 大光斑辐照下冲量耦合系数主要受激光功率密度影响, 光斑尺寸对冲量耦合系数的影响较小; 采用大光斑辐照下冲量耦合系数的理论计算结果更接近于实验结果。上述实验研究成果对激光辐照不规则空间碎片理论研究具有一定的实验指导意义。

The impulse coupling characteristics of space debris irradiated by pulsed laser with big spot was studied. The impulse coupling characteristics of planar debris under big and small spot irradiation were studied conservatively. The influence rules of shape and spot size under big spot irradiation on impulse coupling characteristics were studied. The rationality of theoretical research was verified by the experimental results. The results demonstrate that the impulse coupling coefficient with big spot radiation is higher than that of small spot radiation under the same laser power density. Impulse coupling coefficient under big spot irradiation is mainly affected by laser power density. The influence of spot size on impulse coupling coefficient is small. The theoretical calculation results of impulse coupling coefficient under big spot irradiation are closer to the experimental results. The above experimental results have certain guiding significance for the theoretical study of laser irradiated non-planar space debris.