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Proceedings Paper

70% efficient near 1kW single 1-cm laser-diode bar at 20°C
Author(s): M. T. Knapczyk; J. H. Jacob; H. Eppich; A. K. Chin; K. D. Lang; J. T. Vignati; R. H. Chin
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Paper Abstract

A record, 940W, CW output-power has been achieved for a single, 1cm-wide, 5mm cavity-length, 77% fill-factor, 940nm, laser-diode bar operated at 900A and 20°C heat-sink temperature. The slope efficiency below 400A is 1.2W/A and the peak power-conversion efficiency is 70%. The laser bar was attached to a novel EPIC (Enhanced Performance Impingement Cooler) heat-sink which has a heat removal capacity exceeding 3kW/cm2. Constant current operation at 580A (~600W), 20°C over a period of 100hrs was also demonstrated. These record results are, in large part, due to the record low thermal resistance of 0.060K/W, about a third that of micro-channel coolers.

Paper Details

Date Published: 21 February 2011
PDF: 6 pages
Proc. SPIE 7918, High-Power Diode Laser Technology and Applications IX, 79180F (21 February 2011); doi: 10.1117/12.873179
Show Author Affiliations
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)
A. K. Chin, Somerville Laser Technology, LLC (United States)
K. D. Lang, Science Research Lab., Inc. (United States)
J. T. Vignati, Science Research Lab., Inc. (United States)
R. H. Chin, 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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