High power laser beam shaping for welding applications by means of diffractive elements

Yannick Bourgin; Falk Nagel; Patrick Feßer; Jean-Pierre Bergmann; Stefan Sinzinger

doi:10.1117/12.2320579

14 September 2018 High power laser beam shaping for welding applications by means of diffractive elements

Yannick Bourgin, Falk Nagel, Patrick Feßer, Jean-Pierre Bergmann, Stefan Sinzinger

Proceedings Volume 10744, Laser Beam Shaping XVIII; 107440X (2018) https://doi.org/10.1117/12.2320579
Event: SPIE Optical Engineering + Applications, 2018, San Diego, California, United States

Abstract

Laser welding by means of multi-kilowatt solid state lasers can be considerably improved if the focused welding spot is embedded in a pre-heating spot generated e.g. by an additional laser. To improve the compactness of the optical system, the same functionality can be effectively achieved by means of diffractive diffusers. Because such a diffractive optical solution may suffer from the presence of speckles, a comprehensive characterization of the laser source is performed. The paper includes the design, the compensation of the difference in the intensity levels, the fabrication and the optical performances of the fabricated DOEs. We furthermore present the functionality of the DOEs in the welding process.

Conference Presentation

Citation Download Citation

Yannick Bourgin, Falk Nagel, Patrick Feßer, Jean-Pierre Bergmann, and Stefan Sinzinger "High power laser beam shaping for welding applications by means of diffractive elements", Proc. SPIE 10744, Laser Beam Shaping XVIII, 107440X (14 September 2018); https://doi.org/10.1117/12.2320579

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