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Dynamic focus shaping with mixed-aperture coherent beam combining

Maike Prossotowicz, Daniel Flamm, Andreas Heimes, Florian Jansen, Hans-Jürgen Otto, Aleksander Budnicki, Alexander Killi, and Uwe Morgner

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Abstract

A novel concept for dynamic focus shaping based on highly efficient coherent beam combining with micro-lens arrays (MLAs) as the combining element is presented. This concept allows us to control the power weights of diffraction orders by varying the absolute phases of an array of input beams. A proof-of-principle experiment is supported by simulations. For this, an input beam matrix of $5 \times 5$ beams is combined proving both the ability for further power scaling and dynamic focus shaping.

© 2021 Optical Society of America

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Supplementary Material (5)

NameDescription
Supplement 1       Supplemental Document
Visualization 1       Animated simulation of the beam propagation in z-direction, starting with the individual channels and ending in the combining plane for different scan positions and beam shapes.
Visualization 2       CCD camera images for dynamic beam combination of a beam matrix with 5 x 5 beams. Here, the beam position is changed by adjusting the phases of the input channels.
Visualization 3       Experimental results for beam shaping with CBC.
Visualization 4       Dynamic coherent beam combinatoin with MLAs. 2D-beam shaping in the combining plane.

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