Theoretical analysis and simulation of pulsed laser heating at interface

Theoretical analysis and simulation of pulsed laser heating at interface
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脉冲激光界面加热理论分析与仿真

DOI:
10.1063/1.5008963
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发表时间:
2018-01
影响因子:
3.2
通讯作者:
Tian Chuanshan
Tian Chuanshan
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
Xu Ying;Wang Ruizhe;Ma Shaojie;Zhou Lei;Shen Ron Shen;Tian Chuanshan

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为了在光谱学研究中快速估计表面温度,给出了脉冲激光照射下表面温度的定量而简单的解析解。利用数值模拟支持的解析解,深入研究了稳态表面温度及其随激光参数(如重复频率和光束半径)以及介质性质的时间演化。结果表明,当激光脉冲数在热扩散时间内大于100时,稳态温升达到相同功率连续激光加热温升的85%以上。我们总结了这些结果,以便在已知激光参数和介质性质的情况下,快速估计脉冲激光加热的表面温度演变。
Quantitative yet simple analytical solutions of surface temperature under pulsed laser illumination are presented for a quick estimation in optical spectroscopy studies. Dependence of steady state surface temperature as well as its temporal evolution on laser parameters, such as repetition rate and beam radius, together with medium properties is thoroughly investigated using the analytical solution, which is supported by numerical simulation. It is found that when the pulse number is larger than 100 within the heat diffusion time, the steady-state temperature rise reaches more than 85% of the temperature rise induced by CW laser heating of the same power. We provide a summary of the results to allow their use for a quick estimate of surface temperature evolution from pulse laser heating if laser parameters and medium properties are known.
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