15 October 2015 Numerical simulation of heat accumulation effects with different repetition rate pulse laser
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Abstract
To investigate the heat accumulation effect of the laser pulse train, a two dimensional finite element calculation model is established to calculate the temperature field of Aluminum target based on the Fourier heat transfer theory. Take account of the influence of the repetition rate of laser, four different repetition rates (5 kHz, 10 kHz, 50 kHz and 1 MHz) pulse laser train and continuous wave (CW) laser are analyzed in this study. The results indicate that under the same average power and irradiation time, the peak temperature and accumulative temperature increase with the decrease of the repetition rate. With the increase of the repetition rate, the heat accumulation effect is more closer to the CW laser. The heat accumulation effect of pulse laser train with lower repetitive rate is better.
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Jie Zhou, Zewen Li, Bing Han, Zhonghua Shen, Xiaowu Ni, Jian Lu, "Numerical simulation of heat accumulation effects with different repetition rate pulse laser ", Proc. SPIE 9673, AOPC 2015: Micro/Nano Optical Manufacturing Technologies; and Laser Processing and Rapid Prototyping Techniques, 967308 (15 October 2015); doi: 10.1117/12.2202823; https://doi.org/10.1117/12.2202823
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