High brightness, laser-diode bars are required for efficient coupling into small-core optical-fibers. Record power and
brightness results were achieved using 20% fill-factor, 980nm, 1cm-wide, 4mm cavity-length bars. Lifetimes of single
bars, operated CW at 200W and 20°C, exceed 1000hr. Due to superb thermal management, the power conversion
efficiency (PCE) exceeds 60% at 200W output power. Similar lifetime and PCE were obtained for a 3-bar stack
emitting 600W output power.