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  4. Utilizing fundamental beam-mode shaping technique for top-hat laser intensities in direct laser interference patterning
 
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2018
Journal Article
Title

Utilizing fundamental beam-mode shaping technique for top-hat laser intensities in direct laser interference patterning

Abstract
In this work, a diffractive fundamental beam-mode shaper (FBS) element is combined with a Direct Laser Interference Patterning (DLIP) optical setup to generate a square-shaped top-hat intensity distribution in the interference volume. The interference patterns produced by a symmetrical 4-beam DLIP setup with Gaussian and Flat-top intensity distributions are measured and characterized. The impact of misalignments in the optical setup on the resulting intensity profile is analyzed and supplemented by theoretical calculations of the distorted interference patterns. Finally, top-hat shaped interference patterns can be introduced and utilized in order to generate surface patterns with improved homogeneity which eventually will lead to an improved performance in applications with functionalized surfaces.
Author(s)
El-Khoury, Mikhael  
Fraunhofer-Institut für Werkstoff- und Strahltechnik IWS  
Voisiat, Bogdan
TU Dresden
Kunze, Tim
Fraunhofer-Institut für Werkstoff- und Strahltechnik IWS  
Lasagni, Andrés-Fabián  
Fraunhofer-Institut für Werkstoff- und Strahltechnik IWS  
Journal
Journal of Laser Micro/Nanoengineering. Online journal  
Open Access
DOI
10.2961/jlmn.2018.03.0021
Additional full text version
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Language
English
Fraunhofer-Institut für Werkstoff- und Strahltechnik IWS  
Keyword(s)
  • aberration

  • diffractive optics

  • direct laser interference patterning

  • fundamental beam-mode shaper

  • interference optic

  • top-hat

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