一种基于FPGA的小型化VCSEL激光器温控电路设计  

A Miniaturized Temperature Control Circuit Design of VCSEL Laser Based on FPGA

作　　者：张晨亮 秦旭磊[1] 吴东岷[2] 王健[2] 刘艳阳[1] ZHANG Chenliang;QIN Xulei;WU Dongmin;WANG Jian;LIU Yanyang(School of Physics,Changchun University of Science and Technology,Changchun 130022;Suzhou Institute of Nano-Tech and Nano-Bionics,Chinese Academy of Sciences,Suzhou 215123)

机构地区：[1]长春理工大学物理学院,长春130022 [2]中国科学院苏州纳米技术与纳米仿生研究所,苏州215123

出　　处：《长春理工大学学报（自然科学版）》2024年第4期47-54,共8页Journal of Changchun University of Science and Technology(Natural Science Edition)

基　　金：吉林省科技厅重点研发项目(20210201031GX);吉林省科技厅项目(YDZJ202101ZYTS068);吉林省发改委创新能力建设项目(2023C031-2)。

摘　　要：原子磁强计具有高灵敏度的优点,常被用于测量磁场,磁强计系统中激光器波长的稳定性易受温度影响,导致灵敏度下降。为了提高温度的稳定性,设计一种基于FPGA的激光器温度控制电路,采用ZYNQ7020作为主控芯片,实现可编程逻辑端与处理系统端的信息交互,通过PID算法对数据处理,改变加热信号幅值。为防止直流加热信号引入磁场干扰,影响磁强计性能,采用1 MHz交流正弦波进行加热,完成对温度的闭环控制,最终实现了VCSEL温度控制电路的小型化。实验结果表明,该电路能够将温度控制在80℃,控制精度可以达到±0.003 5℃,满足磁强计系统中激光器对温度稳定性的需求。Atomic magnetometers are known for their high sensitivity and are often used to measure magnetic fields.However,the stability of the laser wavelength in the magnetometer system is easily affected by temperature,leading to a decrease in sensitivity.To improve temperature stability,a FPGA-based laser temperature control circuit was designed using the ZYNQ7020 as the main control chip.This allows for information exchange between the programmable logic side and the processing system side,and uses a PID algorithm for data processing to adjust the amplitude of the heating signal.To prevent magnetic field interference from the direct current heating signal,which could affect the performance of the magnetometer,a 1 MHz alternating current sine wave is used for heating,completing the closed-loop control of temperature.The VCSEL temperature control circuit was ultimately miniaturized.Experimental results show that the circuit can maintain a temperature of 80 ℃ with a control precision of ±0.003 5 ℃,meeting the needs of the magnetometer system's laser for temperature stability.

关 键 词：VCSEL 增量式PID算法 FPGA 小型化 

分 类 号：TN402[电子电信—微电子学与固体电子学]