Design of multi-stage cooling system for high power laser diode

Abstract

This paper proposes a multi-stage cooling system based on TEC (Thermo Electric Cooler), vapor chamber, heat sink and fan for the high power compact laser diode in the high temperature and mobility environment. Using Flow Simulation and ANSYS software, the temperature field and thermal stress of the multi-stage cooling system under steady state are discussed respectively, and the multi-stage cooling system model is optimized according to the two simulation results and the physical test is carried out. The results show that the designed cooling system can achieve a continuous and stable output of more than 70W from the laser at both room temperature of 20°C and high temperature of 55°C.