可调谐激光器多闭环控制驱动系统设计  

Design of a Multi-loop Control Drive System forTunable Laser

作　　者：李永康 朱兴邦 喻一凡 孙庆旭 朱云波 戴永寿[1] LI Yongkang;ZHU Xingbang;YU Yifan;SUN Qingxu;ZHU Yunbo;DAI Yongshou(College of Oceanography and Space Informatics,China University of Petroleum(East China),Qingdao 266000 China;National Defence Opto-Electronic Primary Metrology Laboratory The 41st Institute of CETC ,Qingdao 266000 China)

机构地区：[1]中国石油大学(华东)海洋与空间信息学院,山东青岛266000 [2]中国电子科技集团有限公司第四十一研究所国防科技工业光电子一级计量站,山东青岛266000

出　　处：《电光与控制》2024年第4期98-102,120,共6页Electronics Optics & Control

基　　金：国家自然科学基金(42274159)。

摘　　要：为满足可调谐激光器输出激光的高控制稳定性需求,设计并实现了应用于可调谐激光器的多闭环控制驱动系统。首先,为实现高稳定性电流驱动,基于深度负反馈控制原理设计了电流控制内环,并通过积分补偿和RC滤波回路削弱了噪声和电流波动对激光二极管(LD)的干扰;其次,为了防止恒定电流驱动下LD仍存在的功率衰减问题,利用积分电路和光功率二极管(PD)设计了功率控制内环,并应用仪表放大电路消除了环内共模噪声干扰并实现了线性控制;最后,为了实现驱动电流和输出功率的实时调节,应用位置式PID对系统进行外环控制,与内环共同构成了多闭环控制系统。实验结果表明,电流控制稳定度均优于200 ppm,功率控制稳定度优于0.005 dB/h,激光波长稳定度均优于1 pm/h,能够满足可调谐激光器的高控制稳定性需求。In order to meet the high control stability requirements for the output of a tunable laser a multi-loop control drive system applied to tunable lasers was designed and implemented.Firstly in order to achieve high-stability current drive an inner loop for current control was designed based on the principle of deep negative feedback control and the interference of noise and current fluctuation on the Laser Diode(LD)was reduced by using integral compensation and RC filtering circuit.Secondly in order to prevent the problem of LD power attenuation under constant current drive an inner loop for power control was designed by using integral circuit and optical Power Diode(PD)and linear control was realized by using instrument amplifier circuit to eliminate common mode noise interference in the loop.Finally in order to achieve real-time adjustment of drive current and output power position-based PID control was applied to the outer loop of the system and together with the inner loops a multi-loop control system was formed.The experimental results show that the stability of the current control is better than 200 ppm the stability of the power control is better than 0.005 dB/h and the stability of the laser wavelength is better than 1 pm/h which can meet the high control stability requirements of the tunable laser.

关 键 词：可调谐激光器 自动电流控制 自动功率控制 高稳定性 

分 类 号：TN248.4[电子电信—物理电子学]