Squared Focal Intensity Distributions for Applications in Laser Material Processing.
| Autor: | Schlutow H; Asphericon GmbH, Stockholmer Str. 9, 07747 Jena, Germany., Fuchs U; Asphericon GmbH, Stockholmer Str. 9, 07747 Jena, Germany., Müller FA; Otto Schott Institute of Materials Research (OSIM), Friedrich Schiller University, Löbdergraben 32, 07743 Jena, Germany., Gräf S; Otto Schott Institute of Materials Research (OSIM), Friedrich Schiller University, Löbdergraben 32, 07743 Jena, Germany. |
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| Jazyk: | angličtina |
| Zdroj: | Materials (Basel, Switzerland) [Materials (Basel)] 2021 Aug 31; Vol. 14 (17). Date of Electronic Publication: 2021 Aug 31. |
| DOI: | 10.3390/ma14174981 |
| Abstrakt: | Tailored intensity profiles within the focal spot of the laser beam offer great potential for a well-defined control of the interaction process between laser radiation and material, and thus for improving the processing results. The present paper discusses a novel refractive beam-shaping element that provides different squared intensity distributions converted from the Gaussian output beam of the utilized femtosecond (fs) laser. Using the examples of surface structuring of stainless-steel on the micro- and nano-scale, the suitability of the beam-shaping element for fs-laser material processing with a conventional f-Theta lens is demonstrated. In this context, it was shown that the experimental structuring results are in good agreement with beam profile measurements and numerical simulations of the beam-shaping unit. In addition, the experimental results reveal the improvement of laser processing in terms of a significantly reduced processing time during surface nano-structuring and the possibility to control the ablation geometry during the fabrication of micro-channels. |
| Databáze: | MEDLINE |
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