Periodic surface ripples in laser‐treated aluminum and their use to determine absorbed power
Periodic surface ripples in laser‐treated aluminum and their use to determine absorbed power
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DOI：
10.1063/1.329296
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发表时间：
1981-07
影响因子：
3.2
通讯作者：
Animesh Jain;V. N. Kulkarni;D. Sood;J. S. Uppal
中科院分区：
文献类型：
--
作者：
Animesh Jain;V. N. Kulkarni;D. Sood;J. S. Uppal
本文报道了在脉冲激光（Nd：Glass激光，TEM_（00）模，λ = 1.06 μm，半高宽7ns）作用下，金属（纯金属和注入Al）表面产生的波纹。具有等于入射波长的特征间距的条纹在激光光斑的外围附近在窄区域上容易地被看到，从而导致熔化阈值的准确描绘。与计算的熔化阈值的比较导致确定的吸收功率。这种方法可以应用于任何表现出熔化阈值表面波纹特征的材料。
We report the first observation of surface ripples produced on a metal (pure and implanted A1) during pulsed laser treatment (Nd:glass laser in TEM00 mode, λ = 1.06 μm, 7 ns FWHM). Fringes with a characteristic spacing equal to the incident wavelength are readily seen near the periphery of laser spot, over a narrow region, resulting in an accurate delineation of melt threshold. Comparison with the calculated melt threshold leads to determination of the absorbed power. This method to evaluate the absorbed power can be applied to any material exhibiting surface ripples characteristic of melt threshold.