Degenerate four wave mixing of C2 in forward geometry: Spectral lineshape analysis and temperature determination

Jung Jin Ju, Jae Seok Ryu, Chul Woung Park, Jae Won Hahn

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Forward phase-matched degenerate four-wave mixing (DFWM) spectrum of C2 molecules is studied to determine the temperature of a premixed oxyacetylene flame. Both theoretical calculation and experimental measurement of the d3Πg ↔ d3Πu swan band of C2 are performed at weak field intensity. The measured spectra excited with a narrow band optical parametric oscillator (OPO) showed good matches with the results of calculations. When a DFWM spectrum corresponding to the molecular transitions of both high (J = 36-42) and low (J = 8-15) rotational levels is used for a Boltzmann plot, we can determine the flame temperature of 3143 K with a very small temperature uncertainty of 1.6%. In addition, the uncertainty in temperature measurement caused by the line interference of the DFWM spectrum in the forward geometry is estimated to be only 0.5%, which is negligible for practical applications.

Original languageEnglish
Pages (from-to)841-846
Number of pages6
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume40
Issue number2 A
Publication statusPublished - 2001 Feb 1

Fingerprint

Four wave mixing
four-wave mixing
Spectrum analysis
spectrum analysis
Geometry
geometry
Optical parametric oscillators
oxyacetylene
Swan bands
Temperature measurement
Temperature
flame temperature
temperature
parametric amplifiers
temperature measurement
narrowband
flames
Molecules
plots
interference

All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Physics and Astronomy(all)

Cite this

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title = "Degenerate four wave mixing of C2 in forward geometry: Spectral lineshape analysis and temperature determination",
abstract = "Forward phase-matched degenerate four-wave mixing (DFWM) spectrum of C2 molecules is studied to determine the temperature of a premixed oxyacetylene flame. Both theoretical calculation and experimental measurement of the d3Πg ↔ d3Πu swan band of C2 are performed at weak field intensity. The measured spectra excited with a narrow band optical parametric oscillator (OPO) showed good matches with the results of calculations. When a DFWM spectrum corresponding to the molecular transitions of both high (J = 36-42) and low (J = 8-15) rotational levels is used for a Boltzmann plot, we can determine the flame temperature of 3143 K with a very small temperature uncertainty of 1.6{\%}. In addition, the uncertainty in temperature measurement caused by the line interference of the DFWM spectrum in the forward geometry is estimated to be only 0.5{\%}, which is negligible for practical applications.",
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Degenerate four wave mixing of C2 in forward geometry : Spectral lineshape analysis and temperature determination. / Ju, Jung Jin; Ryu, Jae Seok; Park, Chul Woung; Hahn, Jae Won.

In: Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers, Vol. 40, No. 2 A, 01.02.2001, p. 841-846.

Research output: Contribution to journalArticle

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AU - Park, Chul Woung

AU - Hahn, Jae Won

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AB - Forward phase-matched degenerate four-wave mixing (DFWM) spectrum of C2 molecules is studied to determine the temperature of a premixed oxyacetylene flame. Both theoretical calculation and experimental measurement of the d3Πg ↔ d3Πu swan band of C2 are performed at weak field intensity. The measured spectra excited with a narrow band optical parametric oscillator (OPO) showed good matches with the results of calculations. When a DFWM spectrum corresponding to the molecular transitions of both high (J = 36-42) and low (J = 8-15) rotational levels is used for a Boltzmann plot, we can determine the flame temperature of 3143 K with a very small temperature uncertainty of 1.6%. In addition, the uncertainty in temperature measurement caused by the line interference of the DFWM spectrum in the forward geometry is estimated to be only 0.5%, which is negligible for practical applications.

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