基于电流自适应补偿的高稳定度调制光栅Y分支型激光器控制系统  

High-stability MG-Y Laser Control System Based on Self-adaptive Current Compensation

作　　者：黄怿[1] 尤越 邓传鲁[1] 胡程勇 汪立森 张小贝[1] 王廷云[1] HUANG Yi;YOU Yue;DENG Chuanlu;HU Chengyong;WANG Lisen;ZHANG Xiaobei;WANG Tingyun(Key Laboratory of Specialty Fiber Optics and Optical Access Networks,`Joint International Research Laboratory of Specialty Fiber Optics and Advanced Communication,Shanghai University,Shanghai 200444,China)

机构地区：[1]上海大学特种光纤与光接入网重点实验室特种光纤与先进通信国际合作联合实验室,上海200444

出　　处：《光子学报》2023年第2期71-81,共11页Acta Photonica Sinica

基　　金：国家自然科学基金(Nos.61875116,62022053,62027818);上海市自然科学基金(Nos.22ZR142300,22010500100)。

摘　　要：针对半导体激光器在实际应用中波长、功率稳定性较差以及控制系统复杂等问题,设计了一套高稳定度调制光栅Y分支型激光器控制系统。该系统利用模糊比例-积分-微分控制算法稳定功率,并通过两次正交试验优化算法参数,减小功率超调量,同时提出电流自适应补偿的波长校准算法,提升不同功率下的波长稳定性,解决电流内环反馈时引起的波长和功率交叉影响问题。结果表明,仿真优化后的激光器功率超调量从1.528%降低至0.014%,系统调整次数由21减小至17;测试调制光栅Y分支型激光器60 min内的功率漂移量仅为0.0044 mW,稳定度达到0.0604%,波长漂移量为1.9 pm,稳定度达到1.22×10^(−6)。经校准,激光器的半导体光放大器电流在28~78 mA范围内,波长变化量从23.4 pm减小至2.6 pm。The output stability of semiconductor lasers is simultaneously affected by current and temperature,and the power and wavelength of lasers are prone to fluctuations in practice,which may even damage lasers permanent.In this paper,a high-stability Modulated Grating Y-branch(MG-Y)laser control system based on self-adaptive current compensation is proposed to address the problems of poor stability of wavelength and power as well as the complexity of the laser control system.The whole system is integrated into a printed circuit board with a small size,light weight and low power consumption.Based on the current inner loop feedback,we optimize the parameters of Fuzzy Proportional-Integral-Differential(PID)algorithm by orthogonal experiments and propose a wavelength calibration algorithm based on self-adaptive current compensation.The high-stability MG-Y laser control system is described in detail.Firstly,we introduce the system device and principle of operation.MG-Y laser is controlled by 5 currents and operates at 25℃.Left reflector current(Ileft),right reflector current(Iright),and phase section current(Iphase)are used for wavelength adjustment,while the power is adjusted by the gain section current(Igain)and the semiconductor optical amplifier current(ISOA).The control system is mainly composed of MG-Y laser,constant current source chip ADN8810,temperature control chip ADN8834,and operational amplifier chip AD8620.Secondly,in terms of power stability,a Fuzzy PID control parameter optimization algorithm based on orthogonal experiments is proposed to reduce both the overshoot of laser power and adjustment times of control system.The number of orthogonal experiments and the range of Fuzzy PID parameters need to be confirmed,then we design the orthogonal tables by screening the value range of each control parameter.The algorithm can effectively approach the optimal value of each parameter and also improve the performance of the laser control system.In the wavelength calibration part,we propose a wavelength calibration

关 键 词：MG-Y激光器 激光器控制系统 正交试验 波长校准 自适应 高稳定度 

分 类 号：TN248.4[电子电信—物理电子学]