论文部分内容阅读
研制了一种板级多通道半导体激光器温控系统,将其应用于混合气体检测中可实现同时对多个半导体激光器温度的控制.该系统硬件上由多通道温度采集模块、数字信号处理器模块、半导体制冷器(TEC)和TEC控制模块组成.软件上采用时间片轮转调度算法和积分分离式数字比例积分微分算法,实现了对多个半导体激光器温度的实时、精确控制.为了测试系统的性能,利用该系统同时控制中心波长为1.65μm和1.56μm的可调谐分布反馈激光器的温度,进行了温度控制实验并测试了两个激光器的发光光谱.实验结果表明,该系统可以实现对两个激光器温度的同时控制,温控精度为-0.011~0.015℃,响应时间小于3s.对温控系统的工作稳定性进行了测试,两个激光器连续工作6h,其工作温度保持恒定.连续10h测试两个激光器的输出光谱,输出波长的峰值未出现偏移.该温控系统体积小、成本低、便于集成且稳定可靠,在混合气体检测中有良好的应用前景.
A multi-channel semiconductor laser temperature control system has been developed, which can be used to control the temperature of multiple semiconductor lasers at the same time when it is used in the mixed gas detection.The hardware of the system consists of a multi-channel temperature acquisition module, a digital signal processor module , Semiconductor cooler (TEC) and TEC control module.This software realizes the real-time and precise control of the temperature of multiple semiconductor lasers by using the time slice rotation scheduling algorithm and integral separation digital proportional integral differential algorithm.In order to test the performance of the system , The temperature of the tunable distributed feedback laser with central wavelength of 1.65μm and 1.56μm was controlled by the system and the emission spectra of the two lasers were tested.The experimental results show that the system can realize the two lasers Temperature control at the same time, the temperature control accuracy of -0.011 ~ 0.015 ℃, the response time is less than 3s. The stability of the temperature control system was tested, the two lasers work continuously for 6h, the working temperature remains constant. Continuous 10h test two Laser output spectrum, the peak wavelength of the output does not appear offset.This temperature control system is small, low cost , Easy to integrate and stable and reliable, and has good application prospect in mixed gas detection.