| Issue |
J. Eur. Opt. Society-Rapid Publ.
Volume 21, Number 1, 2025
EOSAM 2024
|
|
|---|---|---|
| Article Number | 17 | |
| Number of page(s) | 9 | |
| DOI | https://doi.org/10.1051/jeos/2025013 | |
| Published online | 21 April 2025 | |
Research Article
Beyond the IFTA – Phase mask generation for 3D laser beam shaping, tailored temperature distributions and optical amplifiers
1
Chair for Technology of Optical Systems (TOS) – RWTH Aachen University, Steinbachstr. 15, 52074 Aachen, Germany
2
Fraunhofer Institute for Laser Technology (ILT), Steinbachstr. 15, 52074 Aachen, Germany
* Corresponding author: oskar.hofmann@tos.rwth-aachen.de
Received:
31
January
2025
Accepted:
25
March
2025
The iterative Fourier transform algorithm (IFTA) is the most widely used algorithm for the generation of phase masks for laser beam shaping in the field of laser material processing. But its simplicity and efficiency also come with heavy limitations. We here present an overview of our research into application adapted laser beam shaping beyond the capabilities of traditional phase retrieval algorithms for beam shaping. The presented algorithms enable, among others, the explicit optimization of phase masks for the generation of target light volumes and for tailored temperature distributions within a work piece. Furthermore, we demonstrate the consideration and pre-compensation of non-linear effects in an optical amplifier for laser beam shaping with subsequent amplification.
Key words: Beam shaping / Phase retrieval / Phase mask / Non-linear amplification / Inverse heat conduction problem
© The Author(s), published by EDP Sciences, 2025
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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