High power laser constant temperature control system

To solve the waste heat problem in optical crystals of semiconductor lasers, this paper designs and implements a high-precision automatic thermostat control system based on Thermo-Electric Cooler (TEC). This system realizes an embedded interactive program based on winCE system, adopts PT100 as a temperature sensor, uses H-Bridge to driven the TEC module and applies classical PID algorithm to control and adjust temperature automatically. After mechanical packaging, this system is finally completed. The experimental results showed that the temperature of this system can be maintained stably at the setting level for a long time after about 2 minutes adjustment. And its temperature fluctuation is less than 0.01 °C with great stability.