激光吸收光谱技术中扫描频率的选择

Translated title of the contribution: Scanning frequency optimization of laser absorption spectroscopy

Jiuying Chen, Jianguo Liu, Yabai He, Zhenyu Xu, Han Li, Lu Yao, Song Yuan, Jun Ruan, Junfeng He, Ruifeng Kan*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

The system performance of tunable diode laser absorption spectroscopy (TDLAS) is affected by the characteristics of laser, the characteristics of detector, the modulation parameters, control circuit of laser and acquisition circuit of signal, etc. The characteristics of laser and detector are determined by the level of present production-manufacturing. For direct absorptive method, the modulation parameters contain scanning amplitude and scanning frequency. Scanning amplitude is adjusted to obtain complete absorption signal. The optimization and selection of scanning frequency are discussed in detail. Aiming at this problem, the influence of scanning frequency on direct absorption signals is observed by experiment based on a certain theory in the present paper, and the basis and method of scanning frequency optimization are summarized by analyzing the signal characteristics including amplitude, peak width, adjusted coefficient determination, signal-to-noise ratio and integrated absorbance, etc. The result of the experiment provides a definite basis for the selection of scanning frequency in TDLAS direct absorptive method.

Translated title of the contributionScanning frequency optimization of laser absorption spectroscopy
Original languageChinese
Article number0230003
Pages (from-to)0230003-1-0230003-4
Number of pages4
JournalGuangxue Xuebao/Acta Optica Sinica
Volume33
Issue number2
DOIs
Publication statusPublished - Feb 2013
Externally publishedYes

Keywords

  • Direct absorptive method
  • Scanning frequency
  • Spectroscopy
  • Tunable diode laser absorption spectroscopy

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