电子器件2018，Vol.41Issue(3)：781-785,5.DOI:10.3969/j.issn.1005-9490.2018.03.045
脉冲式阵列量子级联激光器的气体检测仪
Gas Detector Based on Array Quantum Cascade Laser with Pulse Type
摘要
Abstract
In order to be able to identify and measure the concentration of mixed gas,according to the absorption characteristics of infrared spectra of the detected gas, the high precision gas detection instrument is designed by array quantum cascade laser. The TDMA is used on the design of laser driving power supply, which realizes the precise control for the power output by means of high speed pulse control and piecewise fitting. Meanwhile,the weak signal from infrared detector is processed,which greatly improves the measurement accuracy. The test results show that the maximum deviation of drive current is only 0.65 mA,and the current stability is better than 4×10-5 A. The four kinds of gases are tested at ten concentration levels, and the maximum average measurement error is only 0.80％.关键词
气体检测/量子级联激光器/红外吸收光谱/高精度驱动电源/微弱信号放大Key words
gas detection/quantum cascade laser/infrared absorption spectrum/high precision drive power supply/weak signal amplification分类
信息技术与安全科学引用本文复制引用
王昆,李明..脉冲式阵列量子级联激光器的气体检测仪[J].电子器件,2018,41(3):781-785,5.基金项目
国家"十二五"科技支撑计划项目( 2014BAH09F00) （ 2014BAH09F00）
