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Proceedings Paper

Record CW-brightness from a single 20% fill-factor 1-cm laser-diode bar at 20°C
Author(s): A. K. Chin; M. T. Knapczyk; J. H. Jacob; H. Eppich; K. D. Lang; R. H. Chin; M. Dogan
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Paper Abstract

A record, 250W, CW output-power has been achieved for a single, 1cm-wide, 3.5mm cavity-length, 20% fill-factor, 976nm, laser-diode bar operated at 20°C. The remarkable laser-bar performance was in part the result of a novel EPIC (Enhanced Performance Impingement Cooler) heat-sink with a thermal resistance of 0.16K/W. The superb thermal management resulted in record brightness for a laser bar, i.e. a slow-axis divergence of 10° (95% power containment angle) was achieved at 200W output-power. A coupling efficiency of ~74% into a 200μm core, 0.22NA fiber was achieved.

Paper Details

Date Published: 21 February 2011
PDF: 9 pages
Proc. SPIE 7918, High-Power Diode Laser Technology and Applications IX, 79180L (21 February 2011); doi: 10.1117/12.873183
Show Author Affiliations
A. K. Chin, Somerville Laser Technology, LLC (United States)
M. T. Knapczyk, Science Research Lab., Inc. (United States)
J. H. Jacob, Science Research Lab., Inc. (United States)
H. Eppich, Science Research Lab., Inc. (United States)
K. D. Lang, Science Research Lab., Inc. (United States)
R. H. Chin, Science Research Lab., Inc. (United States)
M. Dogan, Science Research Lab., Inc. (United States)


Published in SPIE Proceedings Vol. 7918:
High-Power Diode Laser Technology and Applications IX
Mark S. Zediker, Editor(s)

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