高精度半导体激光二极管温度控制系统

High accurate temperature control system for laser diode

本文使用通用器件，基于比例－ 积分－ 微分（ Ｐ Ｉ Ｄ） 控制技术精心设计了高精度温度控制系统，系统中的 Ｐ Ｉ Ｄ 调节器和相关的辅助电路以及恒温阱，保证了系统的高精度、高稳定性以及实用性。这些辅助电路包括精密电压源、工作温度点设定电路、积分饱和释放电路和温度调节状态显示电路等。系统设计精度为±１ ｍ Ｋ。实验显示，在长时间（ 大于８ ｈ） 内，系统温漂小于±１０ｍ Ｋ。

A temperature control system with high accuracy is designed and fabricated by employing commonly used devices based on proportion integration differentiation(PID) control technique.The PID controller and the relevant auxiliary circuits, as well as the thermostat, ensure this system for high accuracy, good stability and desirable practicality.These auxiliary circuits include precision voltage source, the working temperature setting circuit, the integrating saturation releasing circuit and the display circuit which shows the state of temperature adjustment.The designed accuracy of this circuit system is ±1 mK.The experiment shows that, within quite a long period(longer than 8 hours),the temperature drift in the thermostat is less than ±10 mK. Finally,the error source and ways of improvement are discussed.