4 January 2008 Improvement of nanosecond laser ablation quality by pulse shaping technique
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A novel approach to restrain the formation of the burr during nanosecond laser ablation is reported in this paper. An assistant laser pulse, separated from the primary processing laser pulse with the pulse duration of 21 ns by temporal pulse shaping method, is used to control the formation of the melt deposit. The effect of the assistant pulse on the morphologies of the melt pools is investigated with the aid of microscope. The results of machining grooves on steel samples with the shaped pulses show a reduction of the burr at the boundary of the ablation zone. The contribution indicates a potential method for obtaining an efficient ablation as well as good processing quality in short pulse laser microfabrication.
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X. D. Wang, A. Michalowski, S. L. Wang, J. S. Liu, F. Dausinger, "Improvement of nanosecond laser ablation quality by pulse shaping technique", Proc. SPIE 6825, Lasers in Material Processing and Manufacturing III, 68250O (4 January 2008); doi: 10.1117/12.757732; https://doi.org/10.1117/12.757732

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