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Proceedings Paper

Reliable QCW diode laser arrays for operation with high duty cycles
Author(s): Heiko Kissel; Wilhelm Faßbender; Jens Lotz; Kim Alegria; Tobias Koenning; Dean Stapleton; Steve Patterson; Jens Biesenbach
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Paper Abstract

We present performance and reliability data of high-brightness QCW arrays with a custom, compact and robust design for an operation with high duty cycles. The presented designs are based on single diodes consisting of a 1cm laser bar that is AuSn soldered between two CuW submounts. Arrays of up to 15 diodes as well as one single diode are connected to ceramic base plates on different heat sinks. The available optical output power is shown to be strongly depending on the wavelength and fill factor of the laser bars as well as on the duty cycle, the base plate temperature and the thermal conductivity of the applied ceramic materials. Operation at increased heat sink temperatures up to 45°C is possible without active water cooling or conduction cooling with the help of Peltier elements. Using an array of 15 bars at 980 nm with 20% fill factor and 2 mm cavity on standard ceramics, we can reach an optical output power of 1150 W at 45°C base plate temperature operating the array with 15 Hz and 15% duty cycle. Novel materials allow for more efficient operation and higher optical output powers.

Paper Details

Date Published: 26 February 2013
PDF: 10 pages
Proc. SPIE 8605, High-Power Diode Laser Technology and Applications XI, 86050V (26 February 2013); doi: 10.1117/12.2004399
Show Author Affiliations
Heiko Kissel, DILAS Diodenlaser GmbH (Germany)
Wilhelm Faßbender, DILAS Diodenlaser GmbH (Germany)
Jens Lotz, DILAS Diodenlaser GmbH (Germany)
Kim Alegria, DILAS Diode Laser, Inc. (United States)
Tobias Koenning, DILAS Diode Laser, Inc. (United States)
Dean Stapleton, DILAS Diode Laser, Inc. (United States)
Steve Patterson, DILAS Diode Laser, Inc. (United States)
Jens Biesenbach, DILAS Diodenlaser GmbH (Germany)

Published in SPIE Proceedings Vol. 8605:
High-Power Diode Laser Technology and Applications XI
Mark S. Zediker, Editor(s)

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