高稳定、强鲁棒性DFB激光器温度控制系统

DFB laser temperature control system with high stability and strong robustness

为减少分布式反馈(DFB)激光器输出波长和光功率受其工作温度波动的影响,采用Ziegler-Nichols比例-积分-微分(PID)控制算法,设计并研制了一种具有强鲁棒性的DFB激光器温度控制系统。利用该温度控制系统,对中国科学院半导体研究所研制的中心波长为1.742μm的DFB激光器进行了温度控制测试。实验证明,该系统的控制精度为±0.05℃,温度控制范围为5～60℃,并在长时间(220min)运行中,DFB激光器工作状态稳定,中心波长未出现漂移,为DFB激光器在红外气体检测领域的实用化提供了性能保障。

In order to reduce the influences of the operation temperature of Distributed Feedback （DFB） laser on its output wavelength and optical power, a strong robustness DFB laser temperature control system was developed using Ziegler-Nichols Proportion-Integral-Derivative （PID） control algorithm. Using this temperature control system, an experiment was performed on a DFB laser with a center wavelength of 1. 742 μm, which was manufactured by the Institute of Semiconductor, CAS. The results indicate that the temperature accuracy of ±0.05 ℃ and control range of 5 ℃-60 ℃ can be achieved by this system respectively. The tested DFB laser works stably without center wavelength shift during long term （220 min） operation. Therefore, this temperature control system provides superior performance that guarantees the application of the DFB laser in infrared gas detection.