Translating the high available power for current industrial lasers in the 100 to 500 W range into high throughput micro-processing is of high importance for future industrial applications. High repetition rates and/or high energies can lead to detrimental thermal effects on the sample and degrade the process quality even using ultrafast lasers. New processing strategies are therefore required to take full advantage of the laser available power. Programmable spatial light modulators (SLM) can bring flexibility while maintaining a high spatial resolution compatible with complex optical functions like multi spots or user defined beam profiles. They enable specific laser characteristics, that can change during the process. The recent technological progress in LCOS based systems, enables high optical transmission greater than 95 %, but also high average power handling up to at least 100 W of laser power. However, the dependence of SLM shaping performance on laser bandwidth places specific requirement when using ultrafast lasers. We will present phase map optimization strategies dedicated to specific industrial applications.
This work presents a new method for ultra-fast laser marking using nano-structures as well as a suitable method of
reading. These nano-structures, called ripples, are an irregular grating with a controllable orientation. It is possible to
observe these ripples and theirs orientations with differents acquisitions systems. The one we chose to use is a scanner. It
is possible to have an ripples' orientation matching one of the colors in the image acquisition. This feature allows us to
consider new applications for marking and new types of identifying code.
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