摘要
为了使半导体激光器的激光波长和输出功率稳定,必须对其温度进行控制。介绍了LD泵浦固体激光器恒温控制系统的软、硬件方面设计。温度采集电路采用具有高输入阻抗和高共模抑制比的测量放大电路,利用半导体制冷器(thermo electric cooler,TEC)作为控温系统的控温执行器件。由改变驱动TEC电流的方向来实现制冷或者加热,软件采用增量型防积分饱和的数字PID算法,根据实验结果温控控制精度在±0.5℃,可以满足对半导体激光器温度控制精度和稳定性的要求。
In order to make wavelength and power stabilization, it is necessary to control temperature as high precision. This paper presents the software and hardware design of constant temperature control unit of LD-pumped solid laser. Temperature sample circuit adopts the measurement amplification circuit with highqnput impedance and high CMRR. It uses TEC as temperature-control operating unit of the system. To control the temperature, we change the direction of TEC drive-current. Software adopts the incriment anti-integral saturated algorithm. According to the experimental results, the temperature control accuracy is in ±0. 5 ℃. It can satisfy the requirement of the precision of temperaturecontrol and stability of semiconductor laser.
出处
《国外电子测量技术》
2009年第5期59-62,共4页
Foreign Electronic Measurement Technology
