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Spectroscopy of /sup 12/CF/sub 4/ features near the 9-. mu. m /sup 12/C/sup 16/O/sub 2/ R (10), R (12), and R (18) lines by CO/sub 2/-laser and diode-laser spectroscopy

Journal Article · · Opt. Lett.; (United States)
DOI:https://doi.org/10.1364/OL.3.000241· OSTI ID:6417778
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The /sup 12/CF/sub 4/ molecule has been made to lase at various wavelengths in the 16-..mu..m ..nu../sub 4/+..nu../sub 2/..--> nu../sub 2/ band by pumping in the 9-..mu..m 0..--> nu../sub 2/+..nu../sub 4/ band with /sup 12/C/sup 16/O/sub 2/ lines. The strongest reported /sup 12/CF/sub 4/ laser line occurs at 615.06 cm/sup -1/ and is pumped by 9R12 (9-..mu..m band, R (12) line). We have measured, by two techniques, the absorption of /sup 12/CF/sub 4/ in 9R12, and also in 9R10 and 9R18, which are known to result in weak 16-..mu..m laser transitions. This was done both at room temperature and at an estimated 100 K, and striking changes in spectral features were noted as the temperature was lowered. For the 9R12 laser line, we find a /sup 12/CF/sub 4/ feature located 30 +- 3 MHz to the high-frequency side of line center, with a peak absorption coefficient of 5 x 10/sup -4/ cm/sup -1/ Torr/sup -1/, depending on temperature. By contrast, there are only weak /sup 12/CF/sub 4/ features within +- 40MHz of the 9R10 and 9R18 laser-line centers, and the absorption coefficients of those features are 1 x 10/sup -4/ to 2 x 10/sup -4/ cm/sup -1/ Torr/sup -1/.

Research Organization:
Los Alamos Scientific Laboratory, University of California, P. O. Box 1663, Los Alamos, New Mexico 87545
OSTI ID:
6417778
Journal Information:
Opt. Lett.; (United States), Journal Name: Opt. Lett.; (United States) Vol. 3:6; ISSN OPLED
Country of Publication:
United States
Language:
English

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Related Subjects

640302* -- Atomic
Molecular & Chemical Physics-- Atomic & Molecular Properties & Theory
74 ATOMIC AND MOLECULAR PHYSICS
ABSORPTION SPECTRA
CARBON DIOXIDE LASERS
CARBON TETRAFLUORIDE
ELECTROMAGNETIC RADIATION
FLUORINATED ALIPHATIC HYDROCARBONS
GAS LASERS
HALOGENATED ALIPHATIC HYDROCARBONS
LASER RADIATION
LASERS
LOW TEMPERATURE
MEDIUM TEMPERATURE
OPTICAL PUMPING
ORGANIC COMPOUNDS
ORGANIC FLUORINE COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
RADIATIONS
SPECTRA
TEMPERATURE DEPENDENCE