High resolution degenerate four wave mixing spectroscopy of the OH radical

The doppler effect on the spectral lineshape and line broadening in the phase conjugate geometry

Jae Seok Ryu, Seung Nam Park, Jae Won Hahn

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

An experiment on high-resolution degenerate four wave mixing (DFWM) spectroscopy is performed at an unsaturated laser power and in a backward geometry. The lineshape and line broadening of the DFWM signal of the OH radical [(1,0) Q 2(11) rotational line in X 2II↔A 2∑] were measured in a propane/air premixed flame. The lineshape dependence on the relative magnitude of the collisional linewidth and the Doppler width is discussed and the influence of the large Doppler broadening in the flame causes the lineshape to be close to a Lorentzian. By fitting the data to the DFWM moving absorber model, we found that the collisional linewidth (0.1136 cm -1) for the transition was larger than other reported values for a different vibrational band of this molecule; the reason for that is discussed.

Original languageEnglish
Pages (from-to)57-62
Number of pages6
JournalJournal of the Korean Physical Society
Volume35
Issue number2
Publication statusPublished - 1999 Dec 1

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Doppler effect
four-wave mixing
high resolution
geometry
spectroscopy
premixed flames
propane
flames
absorbers
causes
air
lasers
molecules

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

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title = "High resolution degenerate four wave mixing spectroscopy of the OH radical: The doppler effect on the spectral lineshape and line broadening in the phase conjugate geometry",
abstract = "An experiment on high-resolution degenerate four wave mixing (DFWM) spectroscopy is performed at an unsaturated laser power and in a backward geometry. The lineshape and line broadening of the DFWM signal of the OH radical [(1,0) Q 2(11) rotational line in X 2II↔A 2∑] were measured in a propane/air premixed flame. The lineshape dependence on the relative magnitude of the collisional linewidth and the Doppler width is discussed and the influence of the large Doppler broadening in the flame causes the lineshape to be close to a Lorentzian. By fitting the data to the DFWM moving absorber model, we found that the collisional linewidth (0.1136 cm -1) for the transition was larger than other reported values for a different vibrational band of this molecule; the reason for that is discussed.",
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T1 - High resolution degenerate four wave mixing spectroscopy of the OH radical

T2 - The doppler effect on the spectral lineshape and line broadening in the phase conjugate geometry

AU - Ryu, Jae Seok

AU - Park, Seung Nam

AU - Hahn, Jae Won

PY - 1999/12/1

Y1 - 1999/12/1

N2 - An experiment on high-resolution degenerate four wave mixing (DFWM) spectroscopy is performed at an unsaturated laser power and in a backward geometry. The lineshape and line broadening of the DFWM signal of the OH radical [(1,0) Q 2(11) rotational line in X 2II↔A 2∑] were measured in a propane/air premixed flame. The lineshape dependence on the relative magnitude of the collisional linewidth and the Doppler width is discussed and the influence of the large Doppler broadening in the flame causes the lineshape to be close to a Lorentzian. By fitting the data to the DFWM moving absorber model, we found that the collisional linewidth (0.1136 cm -1) for the transition was larger than other reported values for a different vibrational band of this molecule; the reason for that is discussed.

AB - An experiment on high-resolution degenerate four wave mixing (DFWM) spectroscopy is performed at an unsaturated laser power and in a backward geometry. The lineshape and line broadening of the DFWM signal of the OH radical [(1,0) Q 2(11) rotational line in X 2II↔A 2∑] were measured in a propane/air premixed flame. The lineshape dependence on the relative magnitude of the collisional linewidth and the Doppler width is discussed and the influence of the large Doppler broadening in the flame causes the lineshape to be close to a Lorentzian. By fitting the data to the DFWM moving absorber model, we found that the collisional linewidth (0.1136 cm -1) for the transition was larger than other reported values for a different vibrational band of this molecule; the reason for that is discussed.

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