25 February 2008 Active cooling solutions for high power laser diodes stacks
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Abstract
High power water cooled diode lasers find increasing demand in biomedical, cosmetic and industrial applications, where very high brightness and power are required. The high brightness is achieved either by increasing the power of each bar or by reducing the emitting area of the stacks. Two new products will be presented: Horizontal CW stacks with output power as high as 1kW using 80 W bars with emitting area width as low as 50 μm; Vertical QCW stacks with output power as high as 1.2kW using 120 W bars. Heat removal from high power laser stacks often requires microchannel coolers operated with finely filtered deionized (DI) water. However, for certain industrial applications the reliability of this cooling method is widely considered insufficient due to leakage failures caused the highly corrosive DI water. Two solutions to the above problem will be discussed. A microchannel cooler-based package, which vastly reduces the corrosion problem, and a novel high-power laser diode stack that completely eliminates it. The latter solution is especially effective for pulsed applications in high duty cycle range.
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Yoram Karni, Genady Klumel, Moshe Levy, Yuri Berk, Yaki Openhaim, Yaakov Gridish, Asher Elgali, Meir Avisar, Moshe Blonder, Hila Sagy, and Alex Gertsenshtein "Active cooling solutions for high power laser diodes stacks", Proc. SPIE 6876, High-Power Diode Laser Technology and Applications VI, 687604 (25 February 2008); doi: 10.1117/12.765156; https://doi.org/10.1117/12.765156
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