PROCEEDINGS ARTICLE | February 26, 2013
Proc. SPIE. 8605, High-Power Diode Laser Technology and Applications XI
KEYWORDS: Collimation, Kinematics, Diodes, Polarization, Selenium, Dielectrics, Laser applications, Laser cutting, High power lasers, Fiber lasers
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.
