基于可调谐半导体激光光谱大气CO₂监测仪

Translated title of the contribution: Tunable diode laser spectroscopy system for carbon dioxide monitoring

Song Yuan, Ruifeng Kan, Yabai He, Lu Yao, Zhenyu Xu, Jun Ruan, Junfeng He, Min Wei, Mingxing Li, Liangquan Jia, Jianguo Liu*

*Corresponding author for this work

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

Mid-infrared spectrum region is the fundamental absorption band of molecules. Tunable diode laser absorption spectroscopy (TDLAS) technology can be applied to detect greenhouse gas sensitively by scanning a single molecular absorption line. A miniaturized system based on the combination of direct absorption method and a 2704 nm band laser is presented, which is utilized to monitor carbon dioxide. Also, the digital signal processor (DSP) data acquisition system can be applied to acquire and process the absorption signal, as well as to revise the concentration according to the environment temperature and altitude. In order to eliminate the shift of wavelength and ensure the detection accuracy, the wavelength locking module is used and finally a SD card is used for data storage. The system is powered by a battery, the response time is 1.6 s and the detection limit is 5×10-7. It takes a long time to test the system, which ensures its stability and feasibility.

Original languageChinese
Article number1208003
Pages (from-to)176-181
Number of pages6
JournalZhongguo Jiguang/Chinese Journal of Lasers
Volume41
Issue number12
DOIs
Publication statusPublished - 10 Dec 2014
Externally publishedYes

Keywords

  • Data acquisition and processing
  • Direct absorption
  • Measurement
  • Tunable diode laser spectroscopy system
  • Wavelength locking

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  • Cite this

    Yuan, S., Kan, R., He, Y., Yao, L., Xu, Z., Ruan, J., ... Liu, J. (2014). 基于可调谐半导体激光光谱大气CO₂监测仪. Zhongguo Jiguang/Chinese Journal of Lasers, 41(12), 176-181. [1208003]. https://doi.org/10.3788/CJL201441.1208003