Abstract
We introduce a novel and simple experimental arrangement for single-pulse two-dimensional temperature mapping in flames by the coherent imaging techniques, degenerate four-wave mixing and polarization spectroscopy, utilizing a dual-wavelength dye laser and a diffraction grating. Each pulse of this dye laser consists of two wavelengths which were tuned to resonance with two different rotational transitions in the Q1 branch of the A2∑-X2∏(0, 0) band of the OH radical. A typical coherent imaging geometry where a sheet-shaped pump beam crossed an unfocused probe beam, was used. The two generated images of OH signal distributions were spatially separated by a diffraction grating and simultaneously detected on a single CCD chip. The two-dimensional single-pulse temperature map was extracted from these images. The precision of the methods is examined and a comparison between degenerate four-wave mixing and polarization spectroscopy is made.
| Original language | English |
|---|---|
| Pages (from-to) | 37-43 |
| Number of pages | 7 |
| Journal | Applied Physics B: Lasers and Optics |
| Volume | 59 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 1 Jul 1994 |
| MoE publication type | A1 Journal article-refereed |
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Keywords
- 42.65
- 82.40
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Single-pulse two-dimensional temperature imaging in flames by degenerate four-wave mixing and polarization spectroscopy. / Nyholm, K.; Fritzon, R.; Aldén, M.
In: Applied Physics B: Lasers and Optics, Vol. 59, No. 1, 01.07.1994, p. 37-43.Research output: Contribution to journal › Article › Scientific › peer-review
TY - JOUR
T1 - Single-pulse two-dimensional temperature imaging in flames by degenerate four-wave mixing and polarization spectroscopy
AU - Nyholm, K.
AU - Fritzon, R.
AU - Aldén, M.
PY - 1994/7/1
Y1 - 1994/7/1
N2 - We introduce a novel and simple experimental arrangement for single-pulse two-dimensional temperature mapping in flames by the coherent imaging techniques, degenerate four-wave mixing and polarization spectroscopy, utilizing a dual-wavelength dye laser and a diffraction grating. Each pulse of this dye laser consists of two wavelengths which were tuned to resonance with two different rotational transitions in the Q1 branch of the A2∑-X2∏(0, 0) band of the OH radical. A typical coherent imaging geometry where a sheet-shaped pump beam crossed an unfocused probe beam, was used. The two generated images of OH signal distributions were spatially separated by a diffraction grating and simultaneously detected on a single CCD chip. The two-dimensional single-pulse temperature map was extracted from these images. The precision of the methods is examined and a comparison between degenerate four-wave mixing and polarization spectroscopy is made.
AB - We introduce a novel and simple experimental arrangement for single-pulse two-dimensional temperature mapping in flames by the coherent imaging techniques, degenerate four-wave mixing and polarization spectroscopy, utilizing a dual-wavelength dye laser and a diffraction grating. Each pulse of this dye laser consists of two wavelengths which were tuned to resonance with two different rotational transitions in the Q1 branch of the A2∑-X2∏(0, 0) band of the OH radical. A typical coherent imaging geometry where a sheet-shaped pump beam crossed an unfocused probe beam, was used. The two generated images of OH signal distributions were spatially separated by a diffraction grating and simultaneously detected on a single CCD chip. The two-dimensional single-pulse temperature map was extracted from these images. The precision of the methods is examined and a comparison between degenerate four-wave mixing and polarization spectroscopy is made.
KW - 42.65
KW - 82.40
UR - http://www.scopus.com/inward/record.url?scp=0028463437&partnerID=8YFLogxK
U2 - 10.1007/BF01081726
DO - 10.1007/BF01081726
M3 - Article
VL - 59
SP - 37
EP - 43
JO - Applied Physics B: Lasers and Optics
JF - Applied Physics B: Lasers and Optics
SN - 0946-2171
IS - 1
ER -