半导体激光器功率控制系统的研究  

Research on power control system of semiconductor laser

作　　者：郭倩 朱耀麟[1] 朱磊[1] 刘秀平[1] GUO Qian;ZHU Yaolin;ZHU Lei;LIU Xiuping(School of Electronics and Information,Xi’an Polytechnic University,Xi’an 710048,China)

机构地区：[1]西安工程大学电子信息学院,陕西西安710048

出　　处：《现代电子技术》2018年第18期147-149,共3页Modern Electronics Technique

基　　金：陕西省教育厅自然科学专项计划(无线光正交频分复用系统高阶调制研究);西安市科技局科技创新计划(201805030YD8CG14(12))~~

摘　　要：为了保障半导体激光器具有稳定的发射功率和良好的工作环境,设计完成了自动功率控制电路和自动温度控制电路。采用负反馈运算放大电路构成恒流源,光电反馈实现闭环控制,可稳定输出功率。同时,利用FPGA控制DRV593驱动半导体制冷器完成自动温度控制,将半导体激光器的工作温度控制在一定范围内。实验结果表明,系统工作时,温度控制精度可达±0.1℃,激光器功率稳定度优于0.74%,实现了精确的功率控制,满足实际应用需求。The automatic power control(APC)circuit and automatic temperature control(ATC)circuit were designed and completed to guarantee the stable transmission power and good working environment of the semiconductor laser.The operation amplifying circuit with negative feedback is adopted to form the constant current source.Closed loop control is realized by using optoelectronic feedback,so as to stabilize output power.Automatic temperature control is achieved by using the FPGA to control the DRV593 driven semiconductor cooler,so as to control the working temperature of the semiconductor laser in a certain range.The experimental results show that the system has temperature control accuracy of±0.1℃and laser power stability of higher than 0.74%,which can realize accurate power control and meet practical application requirements.

关 键 词：自动功率控制 自动温度控制 光电反馈 半导体制冷器 激光器 恒流源 

分 类 号：TN248.4-34[电子电信—物理电子学]