基于STM32H7B0的频分复用型TDLAS激光驱动系统研制  

Development of frequency division multiplexing TDLAS laser driving system based on STM32H7B0

作　　者：苏烨 王彪[2] SU Ye;WANG Biao(Changchun University of Science and Technology,Changchun 130033,China;Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,China)

机构地区：[1]长春理工大学,长春130033 [2]中国科学院长春光学精密机械与物理研究所,长春130033

出　　处：《激光杂志》2025年第1期29-33,共5页Laser Journal

基　　金：吉林省重点研发计划项目(No.20240304195SF)。

摘　　要：在中国推进生态文明建设和“双碳”目标的背景下,二氧化碳和水汽浓度监测意义重大,TDLAS(可调谐二极管激光吸收光谱技术)气体检测技术发展迅速且具备优势。本实验设计了一种以STM32H7B0为主控芯片的频分复用型TDLAS激光驱动系统。利用频分复用技术,主控电路驱动激光器同时对两种气体进行检测。该系统采用STM32H7B0作为主控芯片,利用芯片内部的2路DA产生调制波形,通过AD8051实现V-I转换,实验电路采用NOR Flash系列的SST26VF064B存储芯片,以实现波形参数配比数据存储,同时利用上位机调整DA输出各调制信号参数,实现对激光器输出调制信号的控制。实验结果表明,2路DA的波形信号最大绝对误差均小于0.5%,可满足系统需求,实现对激光器的稳定信号驱动。In the context of China’s promotion of ecological civilization construction and the goal of"double carbon",carbon dioxide and water vapor concentration monitoring is of great significance,and TDLAS(Tunable diode laser absorption spectroscopy)gas detection technology has developed rapidly and has advantages.A frequency division multiplexing TDLAS laser drive system with STM32H7B0 as the main control chip is designed in this experiment.Using frequency division multiplexing technology,the main control circuit drives the laser to detect two gases at the same time.The system uses STM32H7B0 as the main control chip,uses two DA channels inside the chip to generate modulation waveform,and realizes V-I conversion through AD8051.The experimental circuit uses NOR Flash series SST26VF064B memory chip to realize waveform parameter matching data storage.At the same time,the modulation signal parameters of DA output are adjusted by the upper computer to realize the control of the laser output modulation signal.The experimental results show that the maximum absolute error of the waveform signals of the two DA channels is less than 0.5%,which can meet the requirements of the system and realize the stable signal driving of the laser.

关 键 词：TDLAS STM32H7B0 频分复用 激光驱动技术 

分 类 号：TN271.5[电子电信—物理电子学]