Optimized high-power diode laser, laser arrays, and bars for pump applications

R. Hülsewede; H. Schulze; J. Sebastian; D. Schröder; J. Meusel; J. Wolf; P. Hennig

doi:10.1117/12.812492

23 February 2009 Optimized high-power diode laser, laser arrays, and bars for pump applications

R. Hülsewede, H. Schulze, J. Sebastian, D. Schröder, J. Meusel, J. Wolf, P. Hennig

Proceedings Volume 7198, High-Power Diode Laser Technology and Applications VII; 71980A (2009) https://doi.org/10.1117/12.812492
Event: SPIE LASE: Lasers and Applications in Science and Engineering, 2009, San Jose, California, United States

Abstract

Broad area diode laser and diode laser bars are the most efficient light sources. In comparison to solid state laser or gas laser systems the over all beam quality of the diode laser is poor. Thus most application of diode laser bars is high efficient pumping of solid state lasers converting the beam quality and scaling the power of laser systems within the kW range. The pump efficiency and the beam coupling efficiency of the diode laser pumped systems has to be increased to meet the increasing laser market demands for reduced costs. JENOPTIK Diode Lab GmbH (JDL) has optimized their high power brilliance bars to enable reliable high power operation especially, for the 9xx nm wavelength range and low far field divergences. Superior reliability with long operation time of 13,000 hours and high power operation of 200 W are demonstrated for high power bars high filling factor mounted on passively cooled heat sinks. Smaller far field divergence at high power levels requires longer cavity length and higher efficiencies in the beam coupling needs requires lower filling factors. The new high brilliance bars and arrays with 20% filling factor are showing high power operation up to 95 W and a slow axis beam divergence of less than 8° (95% power content).

Citation Download Citation

R. Hülsewede, H. Schulze, J. Sebastian, D. Schröder, J. Meusel, J. Wolf, and P. Hennig "Optimized high-power diode laser, laser arrays, and bars for pump applications", Proc. SPIE 7198, High-Power Diode Laser Technology and Applications VII, 71980A (23 February 2009); https://doi.org/10.1117/12.812492

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