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Average ablation depth per pulse versus the pulse duration obtained by drilling through-holes in a-thick aluminum foil at the laser fluence of (a), (b), respectively.
Optical microscopic images of the debris fall-off pattern of the laser scribed lines on the surface of an aluminum alloy block sample. The three lines are scribed, respectively, with laser pulses of 50 fs (a), 12 ps (b), and continuously scanned from 50 fs to 12 ps (c) for the same pulse energy of . All the other experimental parameters are kept the same.
SEM images of the grooves and corresponding debris produced with 50 fs laser pulses (a) and (b), and 12 ps laser pulses (c) and (d). Laser pulse energy is in both cases and the sample is an aluminum alloy bulk.
Laser fluence dependence of the critical pulse width for the experiment of scribing lines on a polished aluminum alloy block sample.
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