Carbon fiber reinforced plastics (CFRP) have machinability issues, even using high quality laser beams. Since CFRP composes the skin of many aerial equipments, its damage threshold must be assessed in order to consider the vulnerability to laser weapons. This work uses an infrared Yb:fiber laser beam with a quality (M²) of nine in three power levels 400, 700 or 1000 W. The CFRP damage threshold for a focused laser beam was 0.8 J, which is sufficient to create a 0.1 mm hole in the 1 mm plate skin. When the incident energy exceeds 4 J the entire beam pass through the hole and damage the internal substrate. The simulated internal structure is a plate of glass fiber-epoxy composite (GFRP) coated with copper (Cu-GFE). The ablation threshold for the composite was 3.3 J and the board was perforated when the energy is higher than 20 J. If the Cu-layer faced the incident beam the damage threshold was 2 J. According to the analyses, the Cu-coated substrate was more susceptible to ablation because of the explosive boiling at the interface between Cu and the composite. The current results show a relatively cheap fiber laser could be used as a directional energy weapon as long as fine focusing and residence time could be assured.

即使使用高质量的激光束，碳纤维增强塑料 (CFRP) 也存在可加工性问题。由于CFRP构成了许多航空设备的蒙皮，因此必须评估其损伤阈值以考虑激光武器的脆弱性。这项工作使用红外 Yb:光纤激光束，质量为 (M ²) 的三个功率级别中的九个，分别为 400、700 或 1000 W。聚焦激光束的 CFRP 损伤阈值为 0.8 J，足以在 1 mm 板皮上形成 0.1 mm 孔。当入射能量超过 4 J 时，整个光束穿过孔并损坏内部基板。模拟的内部结构是一块涂有铜 (Cu-GFE) 的玻璃纤维环氧树脂复合材料 (GFRP)。复合材料的烧蚀阈值为 3.3 J，当能量高于 20 J 时，板被穿孔。如果 Cu 层面向入射光束，则损坏阈值为 2 J。根据分析，Cu 涂层基板是由于在 Cu 和复合材料之间的界面发生爆炸性沸腾，更容易被烧蚀。