基于TEC的高精度温控系统设计

摘要

在激光领域,很多器件需要高精度的温度控制,例如二极管激光器(LD)、激光晶体、倍频晶体等.针对这些温度敏感器件的控温需求,设计了由恒流源搭建的NTC热敏电阻测温电路、模拟PID电路、双向压控恒流源驱动电路、TEC(半导体制冷器)构成的温控系统.经过实验验证,系统控温响应速度快、稳定性高、可靠性强,温度控制精度高达±0.02℃.%In the laser field,a lot of devices need high precision temperature control,such as diode laser (LD),laser crystal,frequency doubling crystal,etc..A temperature control system consisting of NTC thermistor temperature measurement circuit,analog PID circuit,bidirectional voltage controlled constant current source driver circuit and TEC (semiconductor cooler)is designed to meet the temperature control requirements of these temperature sensitive devices.Through the experimental verification,the system has fast response speed,high stability,high reliability,and the temperature control precision is up to ±0.02.