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Modular high power diode lasers with flexible 3D multiplexing arrangement optimized for automated manufacturing
Author(s): Tobias Könning; Andreas Bayer; Nora Plappert; Wilhelm Faßbender; Sascha Dürsch; Matthias Küster; Ralf Hubrich; Paul Wolf; Bernd Köhler; Jens Biesenbach
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Paper Abstract

A novel 3-dimensional arrangement of mirrors is used to re-arrange beams from 1-D and 2-D high power diode laser arrays. The approach allows for a variety of stacking geometries, depending on individual requirements. While basic building blocks, including collimating optics, always remain the same, most adaptations can be realized by simple rearrangement of a few optical components. Due to fully automated alignment processes, the required changes can be realized in software by changing coordinates, rather than requiring customized mechanical components.

This approach minimizes development costs due to its flexibility, while reducing overall product cost by using similar building blocks for a variety of products and utilizing a high grade of automation. The modules can be operated with industrial grade water, lowering overall system and maintenance cost.

Stackable macro coolers are used as the smallest building block of the system. Each cooler can hold up to five diode laser bars. Micro optical components, collimating the beam, are mounted directly to the cooler. All optical assembly steps are fully automated.

Initially, the beams from all laser bars propagate in the same direction. Key to the concept is an arrangement of deflectors, which re-arrange the beams into a 2-D array of the desired shape and high fill factor. Standard multiplexing techniques like polarization- or wavelengths-multiplexing have been implemented as well.

A variety of fiber coupled modules ranging from a few hundred watts of optical output power to multiple kilowatts of power, as well as customized laser spot geometries like uniform line sources, have been realized.

Paper Details

Date Published: 20 February 2018
PDF: 9 pages
Proc. SPIE 10513, Components and Packaging for Laser Systems IV, 105130I (20 February 2018); doi: 10.1117/12.2290554
Show Author Affiliations
Tobias Könning, COHERENT | DILAS (Germany)
Andreas Bayer, COHERENT | DILAS (Germany)
Nora Plappert, COHERENT | DILAS (Germany)
Wilhelm Faßbender, COHERENT | DILAS (Germany)
Sascha Dürsch, COHERENT | DILAS (Germany)
Matthias Küster, COHERENT | DILAS (Germany)
Ralf Hubrich, COHERENT | DILAS (Germany)
Paul Wolf, COHERENT | DILAS (Germany)
Bernd Köhler, COHERENT | DILAS (Germany)
Jens Biesenbach, COHERENT | DILAS (Germany)

Published in SPIE Proceedings Vol. 10513:
Components and Packaging for Laser Systems IV
Alexei L. Glebov; Paul O. Leisher, Editor(s)

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