一种用于半导体泵浦激光器的TEC温度控制系统

A TEC Temperature Control System for Semiconductor Pumped Lasers

为了减小温度变化对半导体泵浦激光器应用质量的影响,设计了一种基于热电制冷器(Thermo-Electric Cooler,TEC)的温度控制系统。系统以STM32为核心控制器,通过温度采样与控制模块确定泵浦模块目标温度与实际温度之间的温差,结合TEC电源模块和主电路模块,并利用PID算法为TEC提供合适的驱动电流使其加热或制冷,以热传递的方式改变泵浦模块的温度,通过闭环控制保证泵浦模块温度的稳定。实验结果表明,温控系统控温精度不超过±1℃,具有良好的稳定性,在工业智能领域中具有一定的应用价值。

In order to reduce the influence of temperature change on the application quality of semiconductor pumped laser,a temperature control system based on thermo-electric cooler(TEC)is designed in this paper.The system uses STM32 as the core controller,and determines the temperature difference between the target temperature and the actual temperature of the pump module through the temperature sampling and control module.It combines the TEC power supply module and the main circuit module,and uses the PID algorithm to provide the TEC with appropriate driving current to heat or cool it.The temperature of the pump module is changed by the way of heat transfer.The stability of the pump module temperature is ensured through closed-loop control.Experimental result shows that the temperature control accuracy of the temperature control system does not exceed ±1 ℃,which has good stability.