Photoniques 137 | Page 47

MANUFACTURING with short pulse lasers
FOCUS
Figure 3.( a)–( c) Luminescence map excited by different pulse energies( written on the top) and different trains of pulses( written left to the images). Each image is represented by a letter written at the bottom of the image. The k vector marks the laser propagation direction.( d) Images obtained after subtraction of lower-energy maps on higher-energy maps according to the letters written at the bottom of the image.( f) Luminescence images obtained from irradiation with a total pulse energy of 208 nJ in a burst with different number of pulses in the burst as indicated on the top of each image.( g)–( i) On-axis luminescence intensity signals( white dashed line in image O) for different images. The black dotted line represents the position of the geometrical focus( z = 0 μm) [ 3 ]. Copyright 2022 under Creative Commons BY 4.0 license. https:// doi. org / 10.1088 / 2631-7990 / ac8fc3.
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