26 February 2013 Laser-bar stack using ELF heat-sinks mounted kinematically for double-sided cooling
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We present a novel, high-power stack of 20% fill-factor, 976nm, laser-diode bars, each directly attached to an enhanced lateral-flow (ELF), copper-based, water-cooled heat-sink. The heat-sinks contain mounting screws that form a kinematic mount to minimize detrimental mechanical-stress on the diode bars while also providing beneficial, double-side cooling of the bars. A stack of 18-bars, emitting 2.54kW, was constructed to validate the technology. Using standard optics and a polarization multiplexer, a 320μm diameter, 0.3NA focus is achieved with a 6-bar stack that robustly couples 450W, with a ~67% coupling efficiency, from a passive, 400μm, 046NA doubleclad fiber.
© (2013) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
A. K. Chin, A. K. Chin, J. G. Manni, J. G. Manni, R. H. Chin, R. H. Chin, J. Levy, J. Levy, M. Dogan, M. Dogan, J. H. Jacob, J. H. Jacob, R. Pathak, R. Pathak, C. Wessling, C. Wessling, K. D. Lang, K. D. Lang, H. Eppich, H. Eppich, J. Fryer, J. Fryer, T. Haverkamp, T. Haverkamp, } "Laser-bar stack using ELF heat-sinks mounted kinematically for double-sided cooling ", Proc. SPIE 8605, High-Power Diode Laser Technology and Applications XI, 86050P (26 February 2013); doi: 10.1117/12.2002230; https://doi.org/10.1117/12.2002230

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