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Proceedings Paper

High-power reliable 808-nm laser bars for QCW and CW applications
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Paper Abstract

Manufacturers of Nd:YAG lasers continue to demand 808 nm pump sources that deliver ever lower operating costs (measured in $/kW-hour). Responding to this demand, Coherent has developed a new generation of high power, 808 nm laser bars. These lasers are most ideal for high power QCW applications, but also perform very well in CW pumping applications. The key to the improved power for QCW bars is increase in catastrophic optical damage (COD) threshold. Through a combination of advances in epitaxial structure design and coating technology after aging COD limit for new generation of bars has been increased by 40%. This allowed us to achieve reliable QCW operation at 270W of peak power. Life test results shows that lifetime of these bars at these conditions exceed 2e9 shots. We also developed similar structure optimized for CW operations. When mounted on micro-channel water cooled packages CW bars operate reliably at an output power of 150 W. Highest power conversion efficiency (PCE) for CW bars was more then 55% with typical PCE value >50%.

Paper Details

Date Published: 15 February 2006
PDF: 6 pages
Proc. SPIE 6104, High-Power Diode Laser Technology and Applications IV, 610408 (15 February 2006); doi: 10.1117/12.659907
Show Author Affiliations
Mark Mondry, Coherent Inc. (United States)
Michael Fouksman, Coherent Inc. (United States)
Hailong Zhou, Coherent Inc. (United States)
Jun Li, Coherent Inc. (United States)
Jouko Haapamaa, Coherent Finland (Finland)

Published in SPIE Proceedings Vol. 6104:
High-Power Diode Laser Technology and Applications IV
Mark S. Zediker, Editor(s)

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