Abstract

A carbon dioxide laser source was used to determine absorption coefficients for dilute absorber–air mixtures at wavelengths corresponding to several vibration–rotation lines in each branch of the 00°1–02°0 band at 9.4 μm and the 00°1–10°0 band at 10.4 μm. For all samples the total pressure was 1 atm and the temperature was 300 K; the concentrations ranged from 10 ppm (parts per million by volume) to 357 ppm for NH3 and C2H4, and from 10 ppm to 80 ppm for O3. The absorption coefficients are tabulated, and the use of selected laser lines in monitoring ambient concentrations is discussed.

© 1974 Optical Society of America

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References

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  1. E. H. Christy, K. H. Faller, 2nd Joint Conf. on Sensing of Environmental Pollutants, 10–12 Dec. 1973, Washington, D.C., Paper 23.
  2. L. R. Snowman, “Field Study on Application of Laser Coincidence Absorption Measurement Techniques,” Final Report, General Electric Co. Electronics Laboratory, EPA Contract EHSD 71-8.
  3. J. U. White, J. Opt. Soc. Am. 32, 285 (1942).
    [CrossRef]
  4. A. G. Hearn, Proc. Phys. Soc. 78, 932 (1961).
    [CrossRef]
  5. L. Wright, L. Gasiorek, Stanford Research Institute, private communication, August1973.
  6. R. A. McClatchey, W. S. Benedict, S. A. Clough, D. E. Burch, R. F. Calfee, K. Fox, L. S. Rothman, J. S. Garing, “AFCRL Atmospheric Absorption Line Parameters Complication,” Air Force Research Laboratories, Bedford, Mass., AFCRL-TR-0096, January1973.
  7. P. L. Hanst, Chemistry and Physics Laboratory, National Environmental Research Center, Research Triangle Park, N.C., private communication, August1973.
  8. A. D. Devir, U. P. Oppenheim, Appl. Opt. 8, 2121 (1969).
    [CrossRef] [PubMed]
  9. J. H. McCoy, D. B. Rensch, R. K. Long, Appl. Opt. 8, 1471 (1969).
    [CrossRef] [PubMed]
  10. D. E. Burch, “Radiative Properties of the Atmospheric Windows,” in Conference on Atmospheric Radiation, 7–9 Aug. 1972, Fort Collins, Colo. (AMS, Boston, 1972), pp. 61–68.
  11. D. R. Morgan, D. A. Roberts, “Computer Signal Processing Study,” in Final Report, Vol. 1: Analytical Results (General Electric Co. Electronics Laboratory, Dept. of the Army, Englewood Arsenal, Contract DAAA15-71-C-9186, Sept.1972).
  12. 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,” in Final Report (General Electric Co., Ordnance Labs., EPA Contract 68-02-0757; published as EPA-650/2-74-046-A, April1974).
  13. T. Y. Chang, Opt. Commun. 2, 77 (1970).
    [CrossRef]
  14. D. E. Burch, “Semiannual Technical Report; Investigation of the Absorption of Infrared Radiation by Atmospheric Gases,” Philco-Ford Corporation, Aeronautic Division, Contract F19628-69-C-0263, U-4784, January1970.

1970 (1)

T. Y. Chang, Opt. Commun. 2, 77 (1970).
[CrossRef]

1969 (2)

1961 (1)

A. G. Hearn, Proc. Phys. Soc. 78, 932 (1961).
[CrossRef]

1942 (1)

Benedict, W. S.

R. A. McClatchey, W. S. Benedict, S. A. Clough, D. E. Burch, R. F. Calfee, K. Fox, L. S. Rothman, J. S. Garing, “AFCRL Atmospheric Absorption Line Parameters Complication,” Air Force Research Laboratories, Bedford, Mass., AFCRL-TR-0096, January1973.

Burch, D. E.

R. A. McClatchey, W. S. Benedict, S. A. Clough, D. E. Burch, R. F. Calfee, K. Fox, L. S. Rothman, J. S. Garing, “AFCRL Atmospheric Absorption Line Parameters Complication,” Air Force Research Laboratories, Bedford, Mass., AFCRL-TR-0096, January1973.

D. E. Burch, “Radiative Properties of the Atmospheric Windows,” in Conference on Atmospheric Radiation, 7–9 Aug. 1972, Fort Collins, Colo. (AMS, Boston, 1972), pp. 61–68.

D. E. Burch, “Semiannual Technical Report; Investigation of the Absorption of Infrared Radiation by Atmospheric Gases,” Philco-Ford Corporation, Aeronautic Division, Contract F19628-69-C-0263, U-4784, January1970.

Calfee, R. F.

R. A. McClatchey, W. S. Benedict, S. A. Clough, D. E. Burch, R. F. Calfee, K. Fox, L. S. Rothman, J. S. Garing, “AFCRL Atmospheric Absorption Line Parameters Complication,” Air Force Research Laboratories, Bedford, Mass., AFCRL-TR-0096, January1973.

Chang, T. Y.

T. Y. Chang, Opt. Commun. 2, 77 (1970).
[CrossRef]

Christy, E. H.

E. H. Christy, K. H. Faller, 2nd Joint Conf. on Sensing of Environmental Pollutants, 10–12 Dec. 1973, Washington, D.C., Paper 23.

Clough, S. A.

R. A. McClatchey, W. S. Benedict, S. A. Clough, D. E. Burch, R. F. Calfee, K. Fox, L. S. Rothman, J. S. Garing, “AFCRL Atmospheric Absorption Line Parameters Complication,” Air Force Research Laboratories, Bedford, Mass., AFCRL-TR-0096, January1973.

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,” in Final Report (General Electric Co., Ordnance Labs., EPA Contract 68-02-0757; published as EPA-650/2-74-046-A, April1974).

Devir, A. D.

Faller, K. H.

E. H. Christy, K. H. Faller, 2nd Joint Conf. on Sensing of Environmental Pollutants, 10–12 Dec. 1973, Washington, D.C., Paper 23.

Fox, K.

R. A. McClatchey, W. S. Benedict, S. A. Clough, D. E. Burch, R. F. Calfee, K. Fox, L. S. Rothman, J. S. Garing, “AFCRL Atmospheric Absorption Line Parameters Complication,” Air Force Research Laboratories, Bedford, Mass., AFCRL-TR-0096, January1973.

Garing, J. S.

R. A. McClatchey, W. S. Benedict, S. A. Clough, D. E. Burch, R. F. Calfee, K. Fox, L. S. Rothman, J. S. Garing, “AFCRL Atmospheric Absorption Line Parameters Complication,” Air Force Research Laboratories, Bedford, Mass., AFCRL-TR-0096, January1973.

Gasiorek, L.

L. Wright, L. Gasiorek, Stanford Research Institute, private communication, August1973.

Hanst, P. L.

P. L. Hanst, Chemistry and Physics Laboratory, National Environmental Research Center, Research Triangle Park, N.C., private communication, August1973.

Hearn, A. G.

A. G. Hearn, Proc. Phys. Soc. 78, 932 (1961).
[CrossRef]

Long, R. K.

McClatchey, R. A.

R. A. McClatchey, W. S. Benedict, S. A. Clough, D. E. Burch, R. F. Calfee, K. Fox, L. S. Rothman, J. S. Garing, “AFCRL Atmospheric Absorption Line Parameters Complication,” Air Force Research Laboratories, Bedford, Mass., AFCRL-TR-0096, January1973.

McCoy, J. H.

Morgan, D. 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,” in Final Report (General Electric Co., Ordnance Labs., EPA Contract 68-02-0757; published as EPA-650/2-74-046-A, April1974).

D. R. Morgan, D. A. Roberts, “Computer Signal Processing Study,” in Final Report, Vol. 1: Analytical Results (General Electric Co. Electronics Laboratory, Dept. of the Army, Englewood Arsenal, Contract DAAA15-71-C-9186, Sept.1972).

Oppenheim, U. P.

Rensch, D. B.

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,” in Final Report (General Electric Co., Ordnance Labs., EPA Contract 68-02-0757; published as EPA-650/2-74-046-A, April1974).

D. R. Morgan, D. A. Roberts, “Computer Signal Processing Study,” in Final Report, Vol. 1: Analytical Results (General Electric Co. Electronics Laboratory, Dept. of the Army, Englewood Arsenal, Contract DAAA15-71-C-9186, Sept.1972).

Rothman, L. S.

R. A. McClatchey, W. S. Benedict, S. A. Clough, D. E. Burch, R. F. Calfee, K. Fox, L. S. Rothman, J. S. Garing, “AFCRL Atmospheric Absorption Line Parameters Complication,” Air Force Research Laboratories, Bedford, Mass., AFCRL-TR-0096, January1973.

Snowman, L. R.

L. R. Snowman, “Field Study on Application of Laser Coincidence Absorption Measurement Techniques,” Final Report, General Electric Co. Electronics Laboratory, EPA Contract EHSD 71-8.

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,” in Final Report (General Electric Co., Ordnance Labs., EPA Contract 68-02-0757; published as EPA-650/2-74-046-A, April1974).

White, J. U.

Wright, L.

L. Wright, L. Gasiorek, Stanford Research Institute, private communication, August1973.

Appl. Opt. (2)

J. Opt. Soc. Am. (1)

Opt. Commun. (1)

T. Y. Chang, Opt. Commun. 2, 77 (1970).
[CrossRef]

Proc. Phys. Soc. (1)

A. G. Hearn, Proc. Phys. Soc. 78, 932 (1961).
[CrossRef]

Other (9)

L. Wright, L. Gasiorek, Stanford Research Institute, private communication, August1973.

R. A. McClatchey, W. S. Benedict, S. A. Clough, D. E. Burch, R. F. Calfee, K. Fox, L. S. Rothman, J. S. Garing, “AFCRL Atmospheric Absorption Line Parameters Complication,” Air Force Research Laboratories, Bedford, Mass., AFCRL-TR-0096, January1973.

P. L. Hanst, Chemistry and Physics Laboratory, National Environmental Research Center, Research Triangle Park, N.C., private communication, August1973.

D. E. Burch, “Radiative Properties of the Atmospheric Windows,” in Conference on Atmospheric Radiation, 7–9 Aug. 1972, Fort Collins, Colo. (AMS, Boston, 1972), pp. 61–68.

D. R. Morgan, D. A. Roberts, “Computer Signal Processing Study,” in Final Report, Vol. 1: Analytical Results (General Electric Co. Electronics Laboratory, Dept. of the Army, Englewood Arsenal, Contract DAAA15-71-C-9186, Sept.1972).

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,” in Final Report (General Electric Co., Ordnance Labs., EPA Contract 68-02-0757; published as EPA-650/2-74-046-A, April1974).

D. E. Burch, “Semiannual Technical Report; Investigation of the Absorption of Infrared Radiation by Atmospheric Gases,” Philco-Ford Corporation, Aeronautic Division, Contract F19628-69-C-0263, U-4784, January1970.

E. H. Christy, K. H. Faller, 2nd Joint Conf. on Sensing of Environmental Pollutants, 10–12 Dec. 1973, Washington, D.C., Paper 23.

L. R. Snowman, “Field Study on Application of Laser Coincidence Absorption Measurement Techniques,” Final Report, General Electric Co. Electronics Laboratory, EPA Contract EHSD 71-8.

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Figures (5)

Fig. 1
Fig. 1

Laser and optical system: L = laser tube, G = grating, M1–5 = mirrors, C = glass cell, D1,2 = detectors, S1,2 = Hg lamp, W = window, and B = chopper.

Fig. 2
Fig. 2

Plot illustrating, absorption coefficients of O3 for several lines in the P-branch of the 00°1–02°0-band of 12C16O2.

Fig. 3
Fig. 3

Plot illustrating absorption coefficients of NH3, ●, C2H4, ■, and O3, ▲, for lines in the R- and P-branches of the 00°1–02°0 band.

Fig. 4
Fig. 4

Plot illustrating absorption coefficients of NH3, ●, and C2H4, ■, for lines in the R- and P-branches of the 00°1–10°0 band.

Fig. 5
Fig. 5

Composite spectral plot showing attenuation due to individual gases over a total pathlength of 2.0 km. Addition structure in H2O absorption spectrum14 is not shown.

Tables (1)

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Table I Absorption Coefficients (atm-cm)−1a[300 K]

Equations (3)

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P N 2 : P CO 2 : P He
α = ( S γ ) / π [ ( ν ν o ) 2 + γ 2 ] 1 ,
ln T i = j = 1 m α ij u j , i = 1 n .

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