Progress in joule-class diode laser bars and high brightness modules for application in long-pulse pumping of solid state amplifiers

P. Crump; M. M. Karow; S. Knigge; A. Maaßdorf; G. Tränkle; J. Lotz; W. Fassbender; J. Neukum; J. Körner; R. Bödefeld; J. Hein

doi:10.1117/12.2252246

22 February 2017 Progress in joule-class diode laser bars and high brightness modules for application in long-pulse pumping of solid state amplifiers

P. Crump, M. M. Karow, S. Knigge, A. Maaßdorf, G. Tränkle, J. Lotz, W. Fassbender, J. Neukum, J. Körner, R. Bödefeld, J. Hein

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Proceedings Volume 10086, High-Power Diode Laser Technology XV; 100860E (2017) https://doi.org/10.1117/12.2252246
Event: SPIE LASE, 2017, San Francisco, California, United States

Abstract

Progress in the development of highly brilliant pump modules based on novel high-energy-class diode laser bars is presented, targeting long-pulse (2 ms) application in pumping Yb:CaF₂ amplifier crystals. Bars with long resonators and high fill factors are used for low resistance and efficient cooling. Advanced extreme-double asymmetric epitaxial structures are used for high efficiency at high power. Facet passivation is used for long life at high powers, enabling operation at 600 W per bar (1.2 J). Performance of bars and passively cooled stacks is summarized and prospects for further performance enhancements are reviewed.

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P. Crump, M. M. Karow, S. Knigge, A. Maaßdorf, G. Tränkle, J. Lotz, W. Fassbender, J. Neukum, J. Körner, R. Bödefeld, and J. Hein "Progress in joule-class diode laser bars and high brightness modules for application in long-pulse pumping of solid state amplifiers", Proc. SPIE 10086, High-Power Diode Laser Technology XV, 100860E (22 February 2017); https://doi.org/10.1117/12.2252246

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