In order to meet high wavelength stability of DFB in time division multiplexing fiber Bragg grating(TDM-FBG) sensing array, temperature control circuits of DFB are designed, including temperature measurement and set circuits,thermistor linearization,H-bridge driving circuits,PID compensation network,temperature voltage sampling circuits and display circuits. The parameters of DFB's temperature control circuits are tested by using the built-in thermistor and TEC, its accuracy can reach ±0. 04℃ within 180 seconds. This result shows that the strain measurement error from laser's temperature drift will be ±3.4με after temperature control.%针对时分复用光纤光栅(TDM-FBG)传感阵列中使用的分布反馈(DFB)激光器高波长稳定度的要求,设计了一个高精度的DFB温控方案,包括温度测量与设定、热敏电阻线性化、PID补偿回路、H桥驱动、温度电压采集与显示等.使用DFB内置的热敏电阻和半导体制冷器(TEC)对温控电路进行了测试,其精度在180s内达到±0.04℃,温控后激光器温度变化引起的应变测量误差为±3.4με左右,满足TDM-FBG传感阵列的要求.
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