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Proceedings Paper

Diode laser bars deliver > 400-W peak CW power from 800-nm to 980-nm enabling wide range of applications
Author(s): Paul Crump; Steve Patterson; Jun Wang; Weimin Dong; Mike Grimshaw; Shiguo Zhang; Sandrio Elim; Mike Bougher; Jason Patterson; Suhit Das; Damian Wise; Mark DeFranza; Jake Bell; Jason Farmer; Mark De Vito; Rob Martinsen
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Paper Abstract

Peak optical power from single 1-cm diode laser bars is advancing rapidly across all commercial wavelengths. Progress to date has allowed us to demonstrate > 400-W peak output from single 1-cm diode laser bars at emission wavelengths from 800-nm to 980-nm. The available range of emission wavelengths has also been increased, with 90-W bars shown at 660-nm, 37W at 1910-nm and 25W at 2070-nm, complementing the 100-W bar previously demonstrated at 1470-nm. Peak power is seen to correlate closely peak power conversion efficiency. Further advances in diode laser efficiency and low thermal resistance packaging technology continue to drive these powers higher. The most critical improvements have been the reduction in the diode laser operating voltage through optimization of hetero-barriers (leading to 74% efficient 100-W bars on micro-channel at 975-nm) and a reduction in packaging thermal resistance by optimizing microchannel performance (leading to < 0.2-°C/W thermal resistance). We have also recently extended our high efficiency designs to shorter wavelengths, now delivering over 70% efficiency at 790-nm. Ever-increasing power levels (projected to eventually exceed 1-kW per bar) reduce the cost in Euro per W of diode laser systems, enabling broader application in military, industrial and medical markets. In addition, increasing availability of high powers at new wavelengths is enabling many new applications.

Paper Details

Date Published: 5 October 2006
PDF: 9 pages
Proc. SPIE 6397, Technologies for Optical Countermeasures III, 639706 (5 October 2006); doi: 10.1117/12.689842
Show Author Affiliations
Paul Crump, nLight Corp. (United States)
Steve Patterson, nLight Corp. (United States)
Jun Wang, nLight Corp. (United States)
Weimin Dong, nLight Corp. (United States)
Mike Grimshaw, nLight Corp. (United States)
Shiguo Zhang, nLight Corp. (United States)
Sandrio Elim, nLight Corp. (United States)
Mike Bougher, nLight Corp. (United States)
Jason Patterson, nLight Corp. (United States)
Suhit Das, nLight Corp. (United States)
Damian Wise, nLight Corp. (United States)
Mark DeFranza, nLight Corp. (United States)
Jake Bell, nLight Corp. (United States)
Jason Farmer, nLight Corp. (United States)
Mark De Vito, nLight Corp. (United States)
Rob Martinsen, nLight Corp. (United States)

Published in SPIE Proceedings Vol. 6397:
Technologies for Optical Countermeasures III
David H. Titterton, Editor(s)

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