Improvements of high-power diode laser line generators open up new application fields

J. Meinschien; A. Bayer; P. Bruns; L. Aschke; V. N. Lissotschenko

doi:10.1117/12.809574

23 February 2009 Improvements of high-power diode laser line generators open up new application fields

J. Meinschien, A. Bayer, P. Bruns, L. Aschke, V. N. Lissotschenko

Proceedings Volume 7198, High-Power Diode Laser Technology and Applications VII; 71980N (2009) https://doi.org/10.1117/12.809574
Event: SPIE LASE: Lasers and Applications in Science and Engineering, 2009, San Jose, California, United States

Abstract

Beam shaping improvements of line generators based on high power diode lasers lead to new application fields as hardening, annealing or cutting of various materials. Of special interest is the laser treatment of silicon. An overview of the wide variety of applications is presented with special emphasis of the relevance of unique laser beam parameters like power density and beam uniformity. Complementary to vision application and plastic processing, these new application markets become more and more important and can now be addressed by high power diode laser line generators. Herewith, a family of high power diode laser line generators is presented that covers this wide spectrum of application fields with very different requirements, including new applications as cutting of silicon or glass, as well as the beam shaping concepts behind it. A laser that generates a 5m long and 4mm wide homogeneous laser line is shown with peak intensities of 0.2W/cm² for inspection of railway catenaries as well as a laser that generates a homogeneous intensity distribution of 60mm x 2mm size with peak intensities of 225W/cm² for plastic processing. For the annealing of silicon surfaces, a laser was designed that generates an extraordinary uniform intensity distribution with residual inhomogeneities (contrast ratio) of less than 3% over a line length of 11mm and peak intensities of up to 75kW/cm². Ultimately, a laser line is shown with a peak intensity of 250kW/cm² used for cutting applications. Results of various application tests performed with the above mentioned lasers are discussed, particularly the surface treatment of silicon and the cutting of glass.

Citation Download Citation

J. Meinschien, A. Bayer, P. Bruns, L. Aschke, and V. N. Lissotschenko "Improvements of high-power diode laser line generators open up new application fields", Proc. SPIE 7198, High-Power Diode Laser Technology and Applications VII, 71980N (23 February 2009); https://doi.org/10.1117/12.809574

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