Model and computer simulation of nanosecond laser material ablation
Model and computer simulation of nanosecond laser material ablation
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DOI：
10.1007/s00339-004-2723-x
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发表时间：
2004-09
期刊：
影响因子：
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通讯作者：
G. Dumitru;Valerio Romano;H. Weber
中科院分区：
文献类型：
--
作者：
G. Dumitru;Valerio Romano;H. Weber
建立了激光烧蚀过程参数演化的计算机模型。考虑了烧蚀材料对激光能量的吸收、热扩散、相变和屏蔽效应。计算了500，100，20，5和1 ns的单脉冲的消融体积，孔深度和扩展的熔化区的时间发展。对脉冲能量为50 μJ、光斑直径为10 μm的情况进行了模拟。从消融体积的时间演化曲线来看，消融过程在处理脉冲结束之前停止。最佳脉冲持续时间（在纳秒制度）的意见也制定。
A computer model to simulate the evolution of parameters describing laser ablation processes was developed. The absorbed laser energy, the heat diffusion, the phase transformations and the shielding effect of the ablated material were taken into account. The temporal development of the ablated volume, pore depth and extension of the melt zone were calculated for single pulses of 500, 100, 20, 5 and 1 ns. Simulations were performed for pulse energies of 50 μJ and spot diameters of 10 μm. From temporal evolution curves of the ablated volumes, the stoppage of the ablation process was evidenced before the end of the processing pulse. Comments with respect to optimal pulse duration (in the ns regime) are also formulated.