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 language | English |
|---|---|
| Pages (from-to) | 841-846 |
| Number of pages | 6 |
| Journal | Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers |
| Volume | 40 |
| Issue number | 2 A |
| Publication status | Published - 2001 Feb 1 |
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All Science Journal Classification (ASJC) codes
- Engineering(all)
- Physics and Astronomy(all)
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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 journal › Article
TY - JOUR
T1 - Degenerate four wave mixing of C2 in forward geometry
T2 - Spectral lineshape analysis and temperature determination
AU - Ju, Jung Jin
AU - Ryu, Jae Seok
AU - Park, Chul Woung
AU - Hahn, Jae Won
PY - 2001/2/1
Y1 - 2001/2/1
N2 - 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.
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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M3 - Article
AN - SCOPUS:0035246470
VL - 40
SP - 841
EP - 846
JO - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes
JF - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes
SN - 0021-4922
IS - 2 A
ER -