高精度多通道激光器恒定驱动电源研究与设计  

Design and Research on Constant Driving Power Supply for High Precision Multi-Channel Lasers

作　　者：武军凯 茅正冲[1] WU Junkai;MAO Zhengchong(School of Internet of Things,Jiangnan University,Wuxi 214000,China)

机构地区：[1]江南大学物联网工程学院,江苏无锡214000

出　　处：《计算机测量与控制》2024年第6期326-333,共8页Computer Measurement &Control

基　　金：国家自然科学基金青年项目(6170185);国家自然科学基金(61901206)。

摘　　要：为了对多个激光器进行可靠性测试,实现分时工作,同时降低驱动电路体积,选用多路选择开关和多路模拟开关以实现多通道下光电二极管PD和雪崩光电二极管APD的切换,通过设置DAC数模转换芯片不同工作点电压,实现一种可以驱动多通道不同型号激光器的恒定驱动电源电路;电路设计中利用深度负反馈原理来提高系统的稳定度,设计了双OPA和MOS管进一步减小漏电流引起的偏差,优化了电压-电流线性度;软件设计中引入强化学习Actor-Critic框架对RBF-PID算法参数自适应调整,缩短系统动态平衡时间的同时具有智能性;实验表明该驱动电源具有输出精度高(<0.1%),稳定性强(0.05%),纹波系数低(<1μA),动态响应时间快,抗干扰能力强等优点。In order to achieve time-sharing operation and conduct reliability test for multiple lasers,and reduce the size of the driver circuit,multiplex selector and analog switch are chosen to realize the switching of photodiode(PD)and avalanche photodiode(APD)under multiple channels,and the digital-to-analog converter(DAC)chip with different working voltages is configured to realize the constant driving power circuit that can drive multiple channels of various laser diodes.In the circuit design,the deep negative feedback is used to improve the stability of the system,the dual operational amplifier(OPA)and MOS tubes are designed to further reduce the deviation caused by leakage current and optimize the voltage-current linearity.In the software design,the reinforcement learning Actor-Critic framework is introduced for the adaptive adjustment of the radial basis function and proportional integral derivative(RBF-PID)algorithm parameters to shorten the system dynamic balancing time,At the same time,it has an intelligence;The experimental results show that the driving power supply has the shortages of a high output precision of less than 0.1%,high stability of less than 0.05%,low ripple coefficient of less than 1μA,quick dynamic reaction time,and strong anti-interference ability.

关 键 词：激光器 模拟开关 恒定驱动电源 Actor-Critic RBF-PID 

分 类 号：TP303.3[自动化与计算机技术—计算机系统结构]