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Modeling of multi-burst mode pico-second laser ablation for improved material removal rate

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Abstract

This paper deals with the unique phenomena occurring during the multi-burst mode picosecond (ps) laser ablation of metals through modeling and experimental studies. The two-temperature model (TTM) is used and expanded to calculate the ablation depth in the multi-burst mode. A nonlinear increment of ablation volume is found during the multi-burst laser ablation. The deactivation of ablated material and the application of temperature-dependent electron-phonon coupling are demonstrated to be important to provide reliable results. The simulation results based on this expanded laser ablation model are experimentally validated. A significant increase of ablation rate is found in the multi-burst mode, compared with the single-pulse mode under the same total fluence. This numerical model provides a physical perspective into the energy transport process during multi-burst laser ablation and can be used to study the pulse-to-pulse separation time effect on the ablation rate.

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Authors and Affiliations

  1. Center for Laser-based Manufacturing, School of Mechanical Engineering, Purdue University, West Lafayette, IN, 47907, USA

    Wenqian Hu, Yung C. Shin & Galen King

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  1. Wenqian Hu
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  2. Yung C. Shin
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  3. Galen King
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Correspondence to Yung C. Shin.

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Hu, W., Shin, Y.C. & King, G. Modeling of multi-burst mode pico-second laser ablation for improved material removal rate. Appl. Phys. A 98, 407–415 (2010). https://doi.org/10.1007/s00339-009-5405-x

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  • DOI: https://doi.org/10.1007/s00339-009-5405-x

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