TDLAS技术的CO检测系统VCSEL激光光源驱动电路设计  

Design ofdriving circuit for VCSEL laser of CO detection system based on TDLAS technology

作　　者：王彪[1] 鹿洪飞 李奥奇 戴童欣 黄硕 连厚泉 WANG Biao;LU Hongfei;LI Aoqi;DAI Tongxin;HUANG Shuo;LIAN Houquan(Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun,Jilin 130033,China;University of Chinese Academy of Sciences,Beijing 100049,China;University of Science and Technology of China,Hefei 230026,China)

机构地区：[1]中国科学院长春光学精密机械与物理研究所,长春130033 [2]中国科学院大学,北京100049 [3]中国科学技术大学,合肥230026

出　　处：《激光杂志》2020年第6期40-43,共4页Laser Journal

基　　金：国家重大科研仪器研制项目(No.61727822)。

摘　　要：针对单光路的CO检测系统,采用LPC51U68为微控制器,以开定时器的方式,配合ADS7817采集的光电探测器的反馈信号,实现对背景噪声的扣除。配合AD5662和AD9854设计了一款VCSEL激光器的驱动电路。信号叠加由AD8622完成,经LT1077压控恒流源进行高精度V-I转换,实际转换误差小于0.3%。通过实验数据对驱动电路的性能指标进行了分析,证明该驱动电路满足VCSEL激光器的驱动需求。该驱动电路同样适用于其它单光路TDLAS气体检测系统的精度提升,具有较高的灵活性和实用性。Aiming at the CO detection system with single optical path,this paper used LPC51U68 as the micro-controller,and designed a VCSEL laser drive circuit with AD5662 and AD9854.The microcontroller of the drive circuit uses a timer to cooperate with the feedback signal of the photodetector collected by the ADS7817 to realize the deduction of background noise.The signal superposition is completed by the AD8622,and the high-precision V-I conversion is performed by the LT1077 voltage-controlled constant current source.The actual conversion error is less than 0.3%.Through the experimental data,the performance index of the drive circuit is analyzed,which proves that the drive circuit meets the drive requirements of the VCSEL laser.The drive circuit is also suitable for improving the accuracy of other single optical path TDLAS gas detection systems,and has high flexibility and practicality.

关 键 词：TDLAS VCSEL激光器驱动 CO气体检测 LPC51U68 

分 类 号：TN219[电子电信—物理电子学]