15 February 2006 High-power reliable 808-nm laser bars for QCW and CW applications
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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%.
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Mark Mondry, Mark Mondry, Michael Fouksman, Michael Fouksman, Hailong Zhou, Hailong Zhou, Jun Li, Jun Li, Jouko Haapamaa, Jouko Haapamaa, } "High-power reliable 808-nm laser bars for QCW and CW applications", Proc. SPIE 6104, High-Power Diode Laser Technology and Applications IV, 610408 (15 February 2006); doi: 10.1117/12.659907; https://doi.org/10.1117/12.659907
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