Measuring the concentration of minor species from the modulation dip of the nonresonant background of broad-band CARS spectra

J. W. Hahn, S. N. Park, E. S. Lee, C. Rhee, K. T. Kang, S. H. Chung, C. Y. Choi, Y. D. Huh

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12 Citations (Scopus)

Abstract

A new technique for measuring the concentration of species from the modulation dip of the nonresonant background of broad-band CARS spectra has been proposed. To reduce the mode noise superimposed on the CARS spectra, we used a modeless laser generating amplified spontaneous emission as the Stokes beam of the broad-band CARS. The modulation dip induced by a minor species, CO in Ar, was numerically calculated and fitted as a function of CO concentration and temperature. We applied this technique in measuring CO concentration in a static cell and also the profile of CO concentration in a CH4/air premixed flame of a counterflow burner.

Original languageEnglish
Pages (from-to)710-714
Number of pages5
JournalApplied Spectroscopy
Volume47
Issue number6
DOIs
Publication statusPublished - 1993

All Science Journal Classification (ASJC) codes

  • Instrumentation
  • Spectroscopy

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