High resolution degenerate four wave mixing spectroscopy of OH radical

the Doppler effect an the lineshape and linebroadening in the backward geometry

Jae Seok Ryu, Seung Nam Park, Jae Won Hahn

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The degenerate four wave mixing spectroscopy makes the spatial separation of signal from background noise possible and it has recently emerged as one of the nonlinear spectroscopic techniques to measure the temperature and concentration of trace molecules in a hostile environment due to its high signal-to-noise ratio. The temperature of the transient molecule like the OH radical in combustion can be usually measured by a Boltzman plot or a spectral simulation of many rotational lines. The basic assumption of these methods is that the DFWM signal is produced by a population grating between the probe beam and one of the pump beams. It is, however, reported that the thermal grating is dominant at high pressure and low temperature, and the DFWM signal generated in this condition can give poor information for the temperature measurement. How the environments, like the polarization of input beams, the geometry of DFWM experiment, pressure and temperature of the gas etc., will influence the DFWM signal, needs to be answered to get the best condition for accurate measurement. The high temperature of the flame gives a relatively large Doppler linebroadening compared to the collisional linebroadening. Thus, the lineshape of the OH radical in a flame is expected to be closer to Lorentzian than to a Lorentzian cubed profile, which is for the case of small Doppler linebroadening.

Original languageEnglish
Title of host publicationCLEO/Pacific Rim 1999 - Pacific Rim Conference on Lasers and Electro-Optics
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages758-759
Number of pages2
ISBN (Electronic)0780356616, 9780780356610
DOIs
Publication statusPublished - 1999 Jan 1
Event1999 Pacific Rim Conference on Lasers and Electro-Optics, CLEO/Pacific Rim 1999 - Seoul, Korea, Republic of
Duration: 1999 Aug 301999 Sep 3

Publication series

NameCLEO/Pacific Rim 1999 - Pacific Rim Conference on Lasers and Electro-Optics
Volume3

Other

Other1999 Pacific Rim Conference on Lasers and Electro-Optics, CLEO/Pacific Rim 1999
CountryKorea, Republic of
CitySeoul
Period99/8/3099/9/3

Fingerprint

Doppler effect
Four wave mixing
four-wave mixing
Spectroscopy
Geometry
high resolution
geometry
spectroscopy
flames
gratings
Temperature
temperature
background noise
Molecules
temperature measurement
molecules
signal to noise ratios
Temperature measurement
plots
pumps

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Computer Networks and Communications
  • Physics and Astronomy(all)

Cite this

Ryu, J. S., Park, S. N., & Hahn, J. W. (1999). High resolution degenerate four wave mixing spectroscopy of OH radical: the Doppler effect an the lineshape and linebroadening in the backward geometry. In CLEO/Pacific Rim 1999 - Pacific Rim Conference on Lasers and Electro-Optics (pp. 758-759). [817818] (CLEO/Pacific Rim 1999 - Pacific Rim Conference on Lasers and Electro-Optics; Vol. 3). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/CLEOPR.1999.817818
Ryu, Jae Seok ; Park, Seung Nam ; Hahn, Jae Won. / High resolution degenerate four wave mixing spectroscopy of OH radical : the Doppler effect an the lineshape and linebroadening in the backward geometry. CLEO/Pacific Rim 1999 - Pacific Rim Conference on Lasers and Electro-Optics. Institute of Electrical and Electronics Engineers Inc., 1999. pp. 758-759 (CLEO/Pacific Rim 1999 - Pacific Rim Conference on Lasers and Electro-Optics).
@inproceedings{1d9636c4218e418d838a1b65e79ce932,
title = "High resolution degenerate four wave mixing spectroscopy of OH radical: the Doppler effect an the lineshape and linebroadening in the backward geometry",
abstract = "The degenerate four wave mixing spectroscopy makes the spatial separation of signal from background noise possible and it has recently emerged as one of the nonlinear spectroscopic techniques to measure the temperature and concentration of trace molecules in a hostile environment due to its high signal-to-noise ratio. The temperature of the transient molecule like the OH radical in combustion can be usually measured by a Boltzman plot or a spectral simulation of many rotational lines. The basic assumption of these methods is that the DFWM signal is produced by a population grating between the probe beam and one of the pump beams. It is, however, reported that the thermal grating is dominant at high pressure and low temperature, and the DFWM signal generated in this condition can give poor information for the temperature measurement. How the environments, like the polarization of input beams, the geometry of DFWM experiment, pressure and temperature of the gas etc., will influence the DFWM signal, needs to be answered to get the best condition for accurate measurement. The high temperature of the flame gives a relatively large Doppler linebroadening compared to the collisional linebroadening. Thus, the lineshape of the OH radical in a flame is expected to be closer to Lorentzian than to a Lorentzian cubed profile, which is for the case of small Doppler linebroadening.",
author = "Ryu, {Jae Seok} and Park, {Seung Nam} and Hahn, {Jae Won}",
year = "1999",
month = "1",
day = "1",
doi = "10.1109/CLEOPR.1999.817818",
language = "English",
series = "CLEO/Pacific Rim 1999 - Pacific Rim Conference on Lasers and Electro-Optics",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
pages = "758--759",
booktitle = "CLEO/Pacific Rim 1999 - Pacific Rim Conference on Lasers and Electro-Optics",
address = "United States",

}

Ryu, JS, Park, SN & Hahn, JW 1999, High resolution degenerate four wave mixing spectroscopy of OH radical: the Doppler effect an the lineshape and linebroadening in the backward geometry. in CLEO/Pacific Rim 1999 - Pacific Rim Conference on Lasers and Electro-Optics., 817818, CLEO/Pacific Rim 1999 - Pacific Rim Conference on Lasers and Electro-Optics, vol. 3, Institute of Electrical and Electronics Engineers Inc., pp. 758-759, 1999 Pacific Rim Conference on Lasers and Electro-Optics, CLEO/Pacific Rim 1999, Seoul, Korea, Republic of, 99/8/30. https://doi.org/10.1109/CLEOPR.1999.817818

High resolution degenerate four wave mixing spectroscopy of OH radical : the Doppler effect an the lineshape and linebroadening in the backward geometry. / Ryu, Jae Seok; Park, Seung Nam; Hahn, Jae Won.

CLEO/Pacific Rim 1999 - Pacific Rim Conference on Lasers and Electro-Optics. Institute of Electrical and Electronics Engineers Inc., 1999. p. 758-759 817818 (CLEO/Pacific Rim 1999 - Pacific Rim Conference on Lasers and Electro-Optics; Vol. 3).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

TY - GEN

T1 - High resolution degenerate four wave mixing spectroscopy of OH radical

T2 - the Doppler effect an the lineshape and linebroadening in the backward geometry

AU - Ryu, Jae Seok

AU - Park, Seung Nam

AU - Hahn, Jae Won

PY - 1999/1/1

Y1 - 1999/1/1

N2 - The degenerate four wave mixing spectroscopy makes the spatial separation of signal from background noise possible and it has recently emerged as one of the nonlinear spectroscopic techniques to measure the temperature and concentration of trace molecules in a hostile environment due to its high signal-to-noise ratio. The temperature of the transient molecule like the OH radical in combustion can be usually measured by a Boltzman plot or a spectral simulation of many rotational lines. The basic assumption of these methods is that the DFWM signal is produced by a population grating between the probe beam and one of the pump beams. It is, however, reported that the thermal grating is dominant at high pressure and low temperature, and the DFWM signal generated in this condition can give poor information for the temperature measurement. How the environments, like the polarization of input beams, the geometry of DFWM experiment, pressure and temperature of the gas etc., will influence the DFWM signal, needs to be answered to get the best condition for accurate measurement. The high temperature of the flame gives a relatively large Doppler linebroadening compared to the collisional linebroadening. Thus, the lineshape of the OH radical in a flame is expected to be closer to Lorentzian than to a Lorentzian cubed profile, which is for the case of small Doppler linebroadening.

AB - The degenerate four wave mixing spectroscopy makes the spatial separation of signal from background noise possible and it has recently emerged as one of the nonlinear spectroscopic techniques to measure the temperature and concentration of trace molecules in a hostile environment due to its high signal-to-noise ratio. The temperature of the transient molecule like the OH radical in combustion can be usually measured by a Boltzman plot or a spectral simulation of many rotational lines. The basic assumption of these methods is that the DFWM signal is produced by a population grating between the probe beam and one of the pump beams. It is, however, reported that the thermal grating is dominant at high pressure and low temperature, and the DFWM signal generated in this condition can give poor information for the temperature measurement. How the environments, like the polarization of input beams, the geometry of DFWM experiment, pressure and temperature of the gas etc., will influence the DFWM signal, needs to be answered to get the best condition for accurate measurement. The high temperature of the flame gives a relatively large Doppler linebroadening compared to the collisional linebroadening. Thus, the lineshape of the OH radical in a flame is expected to be closer to Lorentzian than to a Lorentzian cubed profile, which is for the case of small Doppler linebroadening.

UR - http://www.scopus.com/inward/record.url?scp=0033351244&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0033351244&partnerID=8YFLogxK

U2 - 10.1109/CLEOPR.1999.817818

DO - 10.1109/CLEOPR.1999.817818

M3 - Conference contribution

T3 - CLEO/Pacific Rim 1999 - Pacific Rim Conference on Lasers and Electro-Optics

SP - 758

EP - 759

BT - CLEO/Pacific Rim 1999 - Pacific Rim Conference on Lasers and Electro-Optics

PB - Institute of Electrical and Electronics Engineers Inc.

ER -

Ryu JS, Park SN, Hahn JW. High resolution degenerate four wave mixing spectroscopy of OH radical: the Doppler effect an the lineshape and linebroadening in the backward geometry. In CLEO/Pacific Rim 1999 - Pacific Rim Conference on Lasers and Electro-Optics. Institute of Electrical and Electronics Engineers Inc. 1999. p. 758-759. 817818. (CLEO/Pacific Rim 1999 - Pacific Rim Conference on Lasers and Electro-Optics). https://doi.org/10.1109/CLEOPR.1999.817818