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21 February 2011 100W high-brightness multi-emitter laser pump
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Abstract
We report results of a spatially-multiplexed broad area laser diode platform designed for efficient pumping of fiber lasers or direct-diode systems. Optical output power in excess of 100W from a 105μm core, 0.15NA fiber is demonstrated with high coupling efficiency. The compact form factor and low thermal resistance enable tight packing densities needed for kW-class fiber laser systems. Broad area laser diodes have been optimized to reduce near- and far-field performance and prevent blooming without sacrificing other electro-optic parameters. With proper lens optimization this produces ~5% increase in coupling / wall plug efficiency for our design. In addition to performance characteristics, an update on long term reliability testing of 9XX nm broad area laser diode is provided that continues to show no wear out under high acceleration. Under nominal operating conditions of 12W ex-facet power at 25C, the diode mean time to failure (MTTF) is forecast to be ~ 480 kh.
© (2011) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Richard Duesterberg, Lei Xu, Jay A. Skidmore, James Guo, Jane Cheng, Jihua Du, Brad Johnson, David L. Vecht, Nicolas Guerin, Benlih Huang, Dongliang Yin, Peter Cheng, Reddy Raju, Kong Weng Lee, Jason Cai, Victor Rossin, and Erik P. Zucker "100W high-brightness multi-emitter laser pump", Proc. SPIE 7918, High-Power Diode Laser Technology and Applications IX, 79180V (21 February 2011); doi: 10.1117/12.876570; https://doi.org/10.1117/12.876570
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