COOLING BLOCK, LD DEVICE WITH THE COOLING BLOCK, AND SOLID LASER DEVICE USING THE LD DEVICE AS EXCITATION LIGHT SOURCE

摘要

A cooling block (17), wherein three water channels (21) having a cross sectional shape of elongated hole and inclined relative to a side surface (17c) are formed so as to position near an LD element (18) fixed to the side surface (17c) to remove the heat generated from the LD element (18) by the cooling water flowing through these water channels (21), and the cross sectional area of an inlet manifold water channel is set at two times the cross sectional area of a cooling block water channel or more, irregular parts are formed in the internal surface of the cooling block water channel, and the inlet part of the cooling block water channel is chamfered or curved.