SEMICONDUCTOR LASER MODULE

摘要

PROBLEM TO BE SOLVED: To provide a semiconductor laser module which can effectively dissipate heat generated from a semiconductor laser element by using a constitution of low cost. SOLUTION: A heat sink 121 for conducting heat generated from the semiconductor laser element 22 to a Peltier module 20 is provided with a first layer 121a which is positioned just below the semiconductor laser element 22 and reaches the Peltier module 20, and a second layer 121b whose thermal conductivity in the heat exhaust direction (Z direction) is lower than that of the first layer 121a, and thermal conductivity in the direction perpendicular to the heat exhaust direction is at least that of the first layer 121a and which is positioned in the direction perpendicular to the heat exhaust direction to the first layer 121a.