13 March 2015 Copper-based micro-channel cooler reliably operated using solutions of distilled-water and ethanol as a coolant
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Abstract
Copper-based micro-channel coolers (Cu-MCC) are the lowest thermal-resistance heat-sinks for high-power laserdiode (LD) bars. Presently, the resistivity, pH and oxygen content of the de-ionized water coolant, must be actively controlled to minimize cooler failure by corrosion and electro-corrosion. Additionally, the water must be constantly exposed to ultraviolet radiation to limit the growth of micro-organisms that may clog the micro-channels. In this study, we report the reliable, care-free operation of LD-bars attached to Cu-MCCs, using a solution of distilledwater and ethanol as the coolant. This coolant meets the storage requirements of Mil-Std 810G, e.g. exposure to a storage temperature as low as -51°C and no growth of micro-organisms during passive storage.
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A. K. Chin, A. Nelson, R. H. Chin, R. Bertaska, J. H. Jacob, "Copper-based micro-channel cooler reliably operated using solutions of distilled-water and ethanol as a coolant", Proc. SPIE 9348, High-Power Diode Laser Technology and Applications XIII, 93480Y (13 March 2015); doi: 10.1117/12.2077203; https://doi.org/10.1117/12.2077203
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