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Simultaneous laser-induced fluorescence and sub-Doppler polarization spectroscopy of the CH radical

Kiefer, Johannes ; Li, Zhongshan LU ; Zetterberg, Johan LU orcid ; Linvin, Martin LU and Aldén, Marcus LU (2007) In Optics Communications 270(2). p.347-352
Abstract
The first application of polarization spectroscopy (PS) to the CH radical is demonstrated. In particular, we report on the simultaneous application of laser-induced fluorescence (LIF) and sub-Doppler PS to CH. The conventional experimental setup for PS was supplemented with a second detection system in order to collect the LIF emission. At the same time a Fabry-Perot etalon and molecular iodine were utilized to obtain a precise relative and absolute frequency scale, respectively. CH was investigated in a low pressure methane-oxygen flame. The R-2(5) transition of the B-X (0, 0) band corresponding to a wavelength around 387.3 nm was scanned while fluorescence emission was collected in the spectral region around 431 nm from the B-X (0, 1),... (More)
The first application of polarization spectroscopy (PS) to the CH radical is demonstrated. In particular, we report on the simultaneous application of laser-induced fluorescence (LIF) and sub-Doppler PS to CH. The conventional experimental setup for PS was supplemented with a second detection system in order to collect the LIF emission. At the same time a Fabry-Perot etalon and molecular iodine were utilized to obtain a precise relative and absolute frequency scale, respectively. CH was investigated in a low pressure methane-oxygen flame. The R-2(5) transition of the B-X (0, 0) band corresponding to a wavelength around 387.3 nm was scanned while fluorescence emission was collected in the spectral region around 431 nm from the B-X (0, 1), A-X (1, 1) and A-X (0, 0) bands. The saturation behavior of both techniques is investigated as well as line broadening effects due to the pump laser pulse energy or rather fluence. Saturation fluence for LIF was found to be more than one order of magnitude higher as compared to PS. (Less)
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author
; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
CH radical, polarization, high resolution spectroscopy, laser-induced fluorescence, spectroscopy
in
Optics Communications
volume
270
issue
2
pages
347 - 352
publisher
Elsevier
external identifiers
  • wos:000244157700039
  • scopus:33845642238
ISSN
0030-4018
DOI
10.1016/j.optcom.2006.09.024
language
English
LU publication?
yes
id
46a2e175-3a2b-44fc-855a-2ed4524592fb (old id 674478)
date added to LUP
2016-04-01 16:16:22
date last changed
2022-01-28 18:33:57
@article{46a2e175-3a2b-44fc-855a-2ed4524592fb,
  abstract     = {{The first application of polarization spectroscopy (PS) to the CH radical is demonstrated. In particular, we report on the simultaneous application of laser-induced fluorescence (LIF) and sub-Doppler PS to CH. The conventional experimental setup for PS was supplemented with a second detection system in order to collect the LIF emission. At the same time a Fabry-Perot etalon and molecular iodine were utilized to obtain a precise relative and absolute frequency scale, respectively. CH was investigated in a low pressure methane-oxygen flame. The R-2(5) transition of the B-X (0, 0) band corresponding to a wavelength around 387.3 nm was scanned while fluorescence emission was collected in the spectral region around 431 nm from the B-X (0, 1), A-X (1, 1) and A-X (0, 0) bands. The saturation behavior of both techniques is investigated as well as line broadening effects due to the pump laser pulse energy or rather fluence. Saturation fluence for LIF was found to be more than one order of magnitude higher as compared to PS.}},
  author       = {{Kiefer, Johannes and Li, Zhongshan and Zetterberg, Johan and Linvin, Martin and Aldén, Marcus}},
  issn         = {{0030-4018}},
  keywords     = {{CH radical; polarization; high resolution spectroscopy; laser-induced fluorescence; spectroscopy}},
  language     = {{eng}},
  number       = {{2}},
  pages        = {{347--352}},
  publisher    = {{Elsevier}},
  series       = {{Optics Communications}},
  title        = {{Simultaneous laser-induced fluorescence and sub-Doppler polarization spectroscopy of the CH radical}},
  url          = {{http://dx.doi.org/10.1016/j.optcom.2006.09.024}},
  doi          = {{10.1016/j.optcom.2006.09.024}},
  volume       = {{270}},
  year         = {{2007}},
}