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Proceedings Paper

11-kW direct diode laser system with homogenized 55 × 20 mm2 Top-Hat intensity distribution
Author(s): Bernd Köhler; Axel Noeske; Tobias Kindervater; Armin Wessollek; Thomas Brand; Jens Biesenbach
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Paper Abstract

In comparison with other laser systems diode lasers are characterized by a unique overall efficiency, a small footprint and high reliability. However, one major drawback of direct diode laser systems is the inhomogeneous intensity distribution in the far field. Furthermore the output power of current commercially available systems is limited to about 6 kW. We report on a diode laser system with 11 kW output power at a single wavelength of 940 nm aiming for customer specific large area treatment. To the best of our knowledge this is the highest output power reported so far for a direct diode laser system. In addition to the high output power the intensity distribution of the laser beam is homogenized in both axes leading to a 55 x 20 mm2 Top-Hat intensity profile at a working distance of 400 mm. Homogeneity of the intensity distribution is better than 90%. The intensity in the focal plane is 1 kW/cm2. We will present a detailed characterization of the laser system, including measurements of power, power stability and intensity distribution of the homogenized laser beam. In addition we will compare the experimental data with the results of non-sequential raytracing simulations.

Paper Details

Date Published: 7 February 2007
PDF: 12 pages
Proc. SPIE 6456, High-Power Diode Laser Technology and Applications V, 64560O (7 February 2007); doi: 10.1117/12.698837
Show Author Affiliations
Bernd Köhler, Dilas Diodenlaser GmbH (Germany)
Axel Noeske, Dilas Diodenlaser GmbH (Germany)
Tobias Kindervater, Dilas Diodenlaser GmbH (Germany)
Armin Wessollek, Dilas Diodenlaser GmbH (Germany)
Thomas Brand, Dilas Diodenlaser GmbH (Germany)
Jens Biesenbach, Dilas Diodenlaser GmbH (Germany)


Published in SPIE Proceedings Vol. 6456:
High-Power Diode Laser Technology and Applications V
Mark S. Zediker, Editor(s)

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