Improved Heat Sinking for Laser-Diode Arrays using Microchannels in CVD Diamond

Goodson, K.E., Kurabayashi, K., and Pease, R.F.W., 1997, "Improved Heat Sinking for Laser-Diode Arrays using Microchannels in CVD Diamond," IEEE Transactions on Components, Packaging, and Manufacturing Technology, Vol. B20, pp. 104-109.

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This work proposes a novel cooling system for high-power laser-diode arrays, for which the maximum optical output power density per unit surface area is limited by the temperature rise due to self-heating. The proposed system uses a microchannel heat sink made of chemical-vapor-deposited (CVD) diamond, whose high thermal conductivity increases the efficiency of the channel-wall fins and reduces the array-to-coolant thermal resistance using a simple model for the combined conduction and convection problem. The resistance is calculated to be 75% less than that for a conventional configuration using a silicon microchannel heat sink. The present analysis strongly motivates a future experimental study.

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