Hamamatsu-photonics K.k.

Hirokazu Ohta

Hirofumi Kan

Hirofumi Miyajima

Takeshi Kanzaki

Toshio Naitoh

A semiconductor laser stack apparatuscomprises three semiconductor lasersto, two copper platesand, two lead platesand, a supply tubea discharge tubefour insulating memberstoand three heat sinkstoHere, the heat sinktois formed by a lower planar memberformed with a supply water path groove portionan intermediate planar memberformed with a plurality of water guiding holesand an upper planar memberformed with a discharge water path groove portionwhich are successively stacked one upon another, whereas their contact surfaces are joined together. The heat sinktois provided with pillar piecesfor connecting the bottom face of supply water path groove portionand the lower face of intermediate planar memberto each other, and pillar piecesfor connecting the bottom face of discharge water path groove portionand the upper face of intermediate planar memberto each other.

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Hamamatsu, Japan

Hirokazu Ohta