红外与激光工程, 2019, 48 (7): 0706002, 网络出版: 2019-08-07   

飞秒激光多脉冲烧蚀金属铁的数值模拟

Numerical simulation of femtosecond laser multi-pulse ablation of metal iron
作者单位
四川大学 电子信息学院, 四川 成都 610064
摘要
从表面微结构加工需求出发, 研究了超短脉冲对金属材料的烧蚀作用。利用双温方程推导了多脉冲辐照分析模型, 分别对单脉冲及多脉冲烧蚀金属铁的温度变化规律进行了定量计算和比较。结果表明, 激光能量密度、脉冲宽度、脉冲时间间隔是影响电子/晶格温度变化规律的几个主要因素, 并最终绘制出了在不同的激光能量密度烧蚀下, 材料达到烧蚀阈值需要的脉冲个数, 以此为加工过程中的激光控制提供理论依据。
Abstract
According to the requirements of surface microstructural manufacture, the ablation effect of ultrashort pulses on metal materials was studied. By using the double temperature equation, a multi-pulse irradiation analysis model was established. And then the temperature variations rule of single-pulse and multi-pulse ablation metal iron were quantitatively calculated. The results show that some key parameters, such as laser fluence, pulse width, and pulse interval, have noticeably influence on the electron/lattice temperature variation. Finally the number of pulses that needed for the material to reach the ablation threshold under different laser fluence is plotted, which provides a theoretical basis for the laser control in the process.

王震, 付文静, 张蓉竹. 飞秒激光多脉冲烧蚀金属铁的数值模拟[J]. 红外与激光工程, 2019, 48(7): 0706002. Wang Zhen, Fu Wenjing, Zhang Rongzhu. Numerical simulation of femtosecond laser multi-pulse ablation of metal iron[J]. Infrared and Laser Engineering, 2019, 48(7): 0706002.

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