Abstract
We report the application of quasi-continuous wave (cw) inverse stimulated Raman spectroscopy (SRS) to the quantitative measurement of methane concentrations in atmospheric mixtures near room temperature. The quasi-cw SRS signal, with the use of the v1, fundamental of methane (2916 cm−1), is shown to be proportional to the powers of both the pump and probe lasers as well as to the methane concentration. The current minimum detectable signal corresponds to ∼200 ppm (v/v).
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References
1.
McDowell
R.
and
Patterson
C
, and
Owyoung
A.
, J. Chem. Phys. 72 , 1071 (1980 ).
2.
Esherick
P.
and
Owyoung
A.
, Adv. Infrared Raman Spectrosc. 9 , 130 (1982 ).
3.
Rahn
L.
and
Mattern
P
, and
Farrow
R.
, in Eighteenth Symposium (International) on Combustion (Combustion Institute , Pittsburgh , 1981 ), pp. 1533 –1542 .
4.
Owyoung
A.
and
Rahn
L.
, J. Quantum Electron. QE-15 , 25d (1979 ).
5.
Rahn
L.
, Opt. Lett. 7 , 66 (1982 ).
6.
Pinette
T.
, M.S. Thesis , Purdue University , West Lafayette, Indiana (1995 ).
7.
Miloni
G.
and
Eberly
J.
, Lasers (Wiley , New York , 1988 );
Louden
R.
, The Quantum Theory of Light (Clarendon , Oxford , 1983 ).
8.
Owyoung
A.
and
Patterson
C
, and
McDowell
R.
, Chem. Phys. Lett. 59 , 156 (1978 ).
9.
Rinsland
C.
Devi
V.
and
Smith
M
, and
Benner
D.
, Appl. Opt. 27 , 2296 (1988 ).
10.
Lavorel
B.
Millot
G.
Saint-Loup
R.
Berger
H.
Bonamy
L.
and
Bonamy
J
, and
Robert
D.
, J. Chem. Phys. 93 , 2176 (1990 ).
11.
Millot
G.
and
Lavorel
B
, and
Steinfeld
J.
, J. Chem. Phys. 95 , 7938 (1991 ).
12.
Moosmuller
H.
and
She
C.
, J. Opt. Soc. Am. B 4 , 1977 (1987 ).
13.
Rahn
L.
and
Mattern
P
, and
Farrow
R.
, Phys. Rev. Lett. 45 , 620 (1980 ).
14.
Moosmuller
H.
and
She
C
, and
Huo
W.
, Phys. Rev. A40 , 6983 (1989 ).
15.
Baran
J.
Elliot
D.
Grofcsik
A.
Jones
W. J.
Kubinyi
M.
and
Langley
A. J
, and
Nayar
V. U.
, J. Chem. Soc. Faraday Trans. 2 , 79 , 865 (1983 ).