Abstract

Absorption cross sections at CO2 laser wavelengths have been measured for ethylene and ammonia. The dependence of the cross sections on pressure and temperature have been investigated for pressures and temperatures normally occurring in the atmosphere. The changes in cross section are, e.g., 5% for ethylene at the P(14) 00°1–10°0 line and 10% for ammonia at the R(8) 00°1–10°0 line for a temperature change of 30 K. A comparison with theoretical calculations is made for ammonia.

© 1980 Optical Society of America

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References

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  1. S. E. Craig, D. R. Morgan, D. A. Roberts, L. R. Snowman, “Development of a gas laser system to measure trace gases by long path absorption techniques,” General Electric Co. Ordnance Systems, Final Report, EPA Contract 68-02-0767 (1974).
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  6. M. S. Shumate, R. T. Menzies, J. S. Margolis, L.-G. Rosengren, Appl. Opt. 15, 2480 (1976).
    [CrossRef] [PubMed]
  7. J. Shewchun, B. K. Garside, E. A. Ballik, C. C. Y. Kwan, M. M. Elsherbiny, G. Hogenkamp, A. Kazandjian, Appl. Opt. 15, 340 (1976).
    [CrossRef] [PubMed]
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    [CrossRef] [PubMed]
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    [CrossRef] [PubMed]
  10. J. Boscher, G. Schäfer, W. Wiesemann, “Gasfernanalyse mit CO2-laser, Fortsetzung und Abschluss der Analytischen Laboruntersuchungen,” Battelle-Institut e.V., Frankfurt, Report BF-R-63-616-4 (1979).
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1978 (3)

1976 (3)

1975 (1)

1974 (2)

Ballik, E. A.

Boscher, J.

J. Boscher, G. Schäfer, W. Wiesemann, “Gasfernanalyse mit CO2-laser, Fortsetzung und Abschluss der Analytischen Laboruntersuchungen,” Battelle-Institut e.V., Frankfurt, Report BF-R-63-616-4 (1979).

Brewer, R. J.

Bruce, C. W.

Bunner, R. H. L.

Charpenter, H.

Comera, J.

Craig, S. E.

S. E. Craig, D. R. Morgan, D. A. Roberts, L. R. Snowman, “Development of a gas laser system to measure trace gases by long path absorption techniques,” General Electric Co. Ordnance Systems, Final Report, EPA Contract 68-02-0767 (1974).

D'Agati, A. P.

R. A. McClatchey, A. P. D'Agati, “Atmospheric transmission of laser radiation: computer code laser,” AFGL-TR-78-0029, Air Force Geophysics Laboratory, Hanscom AFB, Mass. (1978).

Damon, E. K.

Elsherbiny, M. M.

Fischer, G.

Garside, B. K.

Green, B. D.

Hogenkamp, G.

Jaussaud, C.

Kazandjian, A.

Kwan, C. C. Y.

Long, R. K.

Margolis, J. S.

Mayer, A.

McClatchey, R. A.

R. A. McClatchey, A. P. D'Agati, “Atmospheric transmission of laser radiation: computer code laser,” AFGL-TR-78-0029, Air Force Geophysics Laboratory, Hanscom AFB, Mass. (1978).

McClenny, W.A.

Menzies, R. T.

Morgan, D. R.

R. R. Patty, G. M. Russwurm, W.A. McClenny, D. R. Morgan, Appl. Opt. 13, 2850 (1974).
[CrossRef] [PubMed]

S. E. Craig, D. R. Morgan, D. A. Roberts, L. R. Snowman, “Development of a gas laser system to measure trace gases by long path absorption techniques,” General Electric Co. Ordnance Systems, Final Report, EPA Contract 68-02-0767 (1974).

Nordstrom, R. J.

Patty, R. R.

Peterson, J. C.

Roberts, D. A.

S. E. Craig, D. R. Morgan, D. A. Roberts, L. R. Snowman, “Development of a gas laser system to measure trace gases by long path absorption techniques,” General Electric Co. Ordnance Systems, Final Report, EPA Contract 68-02-0767 (1974).

Rosengren, L.-G.

Russwurm, G. M.

Schäfer, G.

J. Boscher, G. Schäfer, W. Wiesemann, “Gasfernanalyse mit CO2-laser, Fortsetzung und Abschluss der Analytischen Laboruntersuchungen,” Battelle-Institut e.V., Frankfurt, Report BF-R-63-616-4 (1979).

Schnell, W.

Shewchun, J.

Shumate, M. S.

Snowman, L. R.

S. E. Craig, D. R. Morgan, D. A. Roberts, L. R. Snowman, “Development of a gas laser system to measure trace gases by long path absorption techniques,” General Electric Co. Ordnance Systems, Final Report, EPA Contract 68-02-0767 (1974).

Steinfeld, J. I.

Thomas, M. E.

Wiesemann, W.

J. Boscher, G. Schäfer, W. Wiesemann, “Gasfernanalyse mit CO2-laser, Fortsetzung und Abschluss der Analytischen Laboruntersuchungen,” Battelle-Institut e.V., Frankfurt, Report BF-R-63-616-4 (1979).

Young, C.

Young, L. G.

L. G. Young, “Compilation of stratospheric trace gas spectral parameters,” AFCRL-TR-76-0033, Air Force Cambridge Research Laboratories, Hanscom AFB, Mass. (1976).

Appl. Opt. (9)

Other (4)

S. E. Craig, D. R. Morgan, D. A. Roberts, L. R. Snowman, “Development of a gas laser system to measure trace gases by long path absorption techniques,” General Electric Co. Ordnance Systems, Final Report, EPA Contract 68-02-0767 (1974).

J. Boscher, G. Schäfer, W. Wiesemann, “Gasfernanalyse mit CO2-laser, Fortsetzung und Abschluss der Analytischen Laboruntersuchungen,” Battelle-Institut e.V., Frankfurt, Report BF-R-63-616-4 (1979).

L. G. Young, “Compilation of stratospheric trace gas spectral parameters,” AFCRL-TR-76-0033, Air Force Cambridge Research Laboratories, Hanscom AFB, Mass. (1976).

R. A. McClatchey, A. P. D'Agati, “Atmospheric transmission of laser radiation: computer code laser,” AFGL-TR-78-0029, Air Force Geophysics Laboratory, Hanscom AFB, Mass. (1978).

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Figures (5)

Fig. 1
Fig. 1

Block diagram of the experimental system.

Fig. 2
Fig. 2

Absorption cross sections for ethylene vs temperature for the P(14), P(18), and P(24) laser lines in the 00°1–02°0 CO2 laser band.

Fig. 3
Fig. 3

Absorption cross sections for ammonia vs temperature for the R(8) and R(14) laser lines in the 00°1–10°0 band and the P(20) line in the 00°1–02°0 CO2 laser band.

Fig. 4
Fig. 4

Pressure and temperature coefficients for ethylene absorption cross sections at CO2 laser wavelengths.

Fig. 5
Fig. 5

Pressure and temperature coefficients for ammonia absorption cross sections at CO2 laser wavelengths.

Tables (4)

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Table I Absorption Cross Sections and Pressure and Temperature Coefficients for the P-branch of the 00°1–02°0 CO2 Band

Tables Icon

Table II Absorption Cross Sections and Pressure and Temperature Coefficients for the P-branch of the 00°1–10°0 CO2 Band

Tables Icon

Table III Absorption Cross Sections and Pressure and Temperature Coefficients for the P-branch of the 00°1–10°0 CO2 Band

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Table IV Comparison Between Theoretical and Experimental Data for Ammonia for Some CO2 Laser Lines

Equations (3)

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K P = ( ln σ ln P ) T ,
K T = ( ln σ ln T ) P ,
γ ( p , T ) = γ ( p 0 , T 0 ) p p 0 ( T 0 T ) 0.5 ,

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