Progress in joule-class diode laser bars and high brightness modules for application in long-pulse pumping of solid state amplifiers
Proc. SPIE 10086, Photonics West, San Francisco, USA, Jan 28 - Feb 02, 100860E (2017).
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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.
a Ferdinand-Braun-Institut, Leibniz-Institut für Höchstfrequenztechnik, 12489 Berlin, Germany
b DILAS Diodenlaser GmbH, Galileo-Galilei-Str. 10, 55129 Mainz, Germany
c Lastronics GmbH, Winzerlaer-Str. 2, 07745 Jena, Germany
diode laser, pump sources, bars, joule-class, high efficiency, monolithic stacked arrays.