介绍了激光微推进技术的靶特性研究情况，探讨了激光微推进技术中的靶特性对力学性能的影响。从靶材结构和靶材掺杂两个方面的特性进行了研究。结果表明，在约束条件下，冲量耦合系数存在一个最优值，烧蚀靶厚度越小，最优冲量耦合系数越大，对应的激光注入能量越小，比冲也越高；掺杂能够增强靶材对激光能量的吸收，使得单位质量产生推力的效率提高，同时也会增强其他能量耗散机制，使得冲量耦合系数降低。

The target characteristic research of micro-laser plasma thruster (μLPT) is introduced, and propulsion performance of different target structures and doped concentrations is discussed. Results indicate that there can be an optimum impulse coupling coefficient for the confined target. The thinner the target is, the bigger the optimum impulse coupling coefficient is, the lower the laser energy is, and the higher the specific impulse is. The absorption of laser energy can be intensified by the doped carbon, ablation efficiency can be enhanced, and there might be still other energy dissipation enhanced, and that can result in the decrease of impulse coupling coefficient.