Water vapor absorption of carbon dioxide laser radiation

M. S. Shumate; R. T. Menzies; J. S. Margolis; L.-G. Rosengren

doi:10.1364/AO.15.002480

Applied Optics
Vol. 15,
Issue 10,
pp. 2480-2488
(1976)
•https://doi.org/10.1364/AO.15.002480

Water vapor absorption of carbon dioxide laser radiation

M. S. Shumate, R. T. Menzies, J. S. Margolis, and L.-G. Rosengren

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M. S. Shumate, R. T. Menzies, J. S. Margolis, and L.-G. Rosengren, "Water vapor absorption of carbon dioxide laser radiation," Appl. Opt. 15, 2480-2488 (1976)

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Abstract

An optoacoustic detector or spectrophone has been used to perform detailed measurements of the absorptivity of mixtures of water vapor in air. A C¹²O₂¹⁶ laser was used as the source, and measurements were made. at forty-nine different wavelengths from 9.2 μm to 10.7 μm. The details of the optoacoustic detector and its calibration are presented, along with a discussion of its performance characteristics. The results of the measurements of water vapor absorption show that the continuum absorption in the wavelength range covered is 5–10% lower than previous measurements.

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Laser line (001-I)	Frequency (cm⁻¹)	Absorption coefficients^a (10⁻⁶ cm⁻¹)

		5.0 Torr	10.0 Torr	15.0 Torr
P(32)	932.960	1.39,^b 0.30^c	2.32,^b 0.82^c	3.63,^b 1.93^c
P(30)	934.895	0.36,^b 0.30^c	0.95,^b 0.87^c	2.01,^b 1.92^c
P(28)	936.804	0.33, 0.30^c	0.87	1.85
P(26)	938.688	0.37, 0.34^c	0.89	1.78
P(24)	940.548	0.36	1.00	1.92
P(22)	942.383	0.37	0.94	1.97
P(20)	944.194	0.41	1.15	2.18
P(18)	945.980	0.38	1.00	1.97
P(16)	947.742	0.49,^b,^d 0.45^c,^d	1.23,^b 1.18^c	2.66,^b 2.60^c
P(14)	949.479	0.45,^b 0.40^c	1.27,^b 1.19^c	2.50,^b 2.41^c
P(12)	951.192	0.35,^b 0.31^c	1.01,^b 0.95^c	2.10,^b 2.03^c
P(10)	952.881	0.32	0.91	2.19
R(8)	967.707	1.96,^b 0.41^c	3.08,^b 0.88^c	4.53,^b 2.03^c
R(10)	969.139	0.40,^b 0.34^c	0.81,^b 0.74^c	1.55,^b 1.46^c
R(12)	970.547	1.00,^d,^b 0.97^d,^c	2.12,^b 2.07^c	3.32,^b 3.27^c
R(14)	971.930	0.97,^d,^b 0.92^d,^c	1.81,^b 1.75^c	2.63,^b 2.56^c
R(16)	973.289	0.78^d	1.70	2.59
R(18)	974.622	0.61^d	1.22	1.88
R(20)	975.930	5.49^d	11.0	16.8
R(22)	977.214	0.84^d	1.66	2.67
R(24)	978.472	0.50	1.12	1.90
R(26)	979.705	0.49	1.03	1.78
R(28)	980.913	0.40	0.92	1.66
R(30)	982.096	0.46^d	1.07	1.97
R(32)	983.252	0.40	1.09	1.96

Laser line (001-II)	Frequency (cm⁻¹)	Absorption coefficients^a (10⁻⁶ cm⁻¹)

		5.0 Torr	10.0 Torr	15.0 Torr
P(32)	1035.474	0.42,^b 0.39^c	0.85,^b 0.82^c	1.47,^b 1.43^c
P(30)	1037.434	0.39	0.77	1.39
P(28)	1039.369	1.30^d	2.72^d	4.46^d
P(26)	1041.279	0.41	0.77	1.37
P(24)	1043.163	0.41,^b 0.37^c	0.93,^b 0.89^c	1.57,^b 1.52^c
P(22)	1045.022	0.47,^b 0.44^c	0.96,^b 0.92^c	1.62,^b 1.58^c
P(20)	1046.854	0.51,^b 0.36^c	1.09,^b 0.88^c	1.69,^b 1.44^c
P(18)	1048.661	0.37,^b 0.35^c	0.89,^b 0.86^c	1.43,^b 1.40^c
P(16)	1050.441	0.47,^b,^d 0.45^c,^d	1.02,^b,^d 1.00^c,^d	1.5 8,^b,^d 1.56^c,^d
P(14)	1052.196	0.41,^b 0.38^c	1.03,^b 1.00^c	1.58,^b 1.55^c
P(12)	1053.924	0.43,^b 0.36^c	0.86,^b 0.77^c	1.50,^b 1.40^c
P(10)	1055.625	1.15^d	2.82^d	3.86^d
R(10)	1071.884	0.35	0.83	1.25
R(12)	1073.278	0.44^d	1.17^d	1.88^d
R(14)	1074.646	1.48^d	3.51^d	5.24^d
R(16)	1075.988	1.53,^b,^d 0.57^c,^d	2.88,^b,^d 1.60^c,^d	3.54,^b,^d 2.10^c,^d
R(18)	1077.303	0.43	0.99	1.45
R(20)	1078.591	0.40	0.93	1.41
R(22)	1079.852	0.40	0.91	1.38
R(24)	1081.087	0.39	0.95	1.47
R(26)	1082.296	0.36	0.84	1.35
R(28)	1083.479	0.41,^b 0.38^c	0.97,^b 0.93^c	1.42,^b 1.38^c
R(30)	1084.635	6.21,^b 1.40^c	8.25,^b 1.65^c	9.36,^b 1.93^c
R(32)	1085.765	0.58^d	1.27^d	1.85^d

Water vapor partial pressure	Absorption coefficient, cm⁻¹

	This work	Ref. 3
5.0 Torr	0.41 × 10⁻⁶	0.38 × 10⁻⁶
10.0 Torr	1.15 × 10⁻⁶	1.17 × 10⁻⁶
15.0 Torr	2.18 × 10⁻⁶	2.35 × 10⁻⁶
20.0 Torr	3.53 × 10⁻⁶	3.96 × 10⁻⁶

Laser line (001-I)	Frequency (cm⁻¹)	Absorption coefficients^a (10⁻⁶ cm⁻¹)

		5.0 Torr	10.0 Torr	15.0 Torr
P(32)	932.960	1.39,^b 0.30^c	2.32,^b 0.82^c	3.63,^b 1.93^c
P(30)	934.895	0.36,^b 0.30^c	0.95,^b 0.87^c	2.01,^b 1.92^c
P(28)	936.804	0.33, 0.30^c	0.87	1.85
P(26)	938.688	0.37, 0.34^c	0.89	1.78
P(24)	940.548	0.36	1.00	1.92
P(22)	942.383	0.37	0.94	1.97
P(20)	944.194	0.41	1.15	2.18
P(18)	945.980	0.38	1.00	1.97
P(16)	947.742	0.49,^b,^d 0.45^c,^d	1.23,^b 1.18^c	2.66,^b 2.60^c
P(14)	949.479	0.45,^b 0.40^c	1.27,^b 1.19^c	2.50,^b 2.41^c
P(12)	951.192	0.35,^b 0.31^c	1.01,^b 0.95^c	2.10,^b 2.03^c
P(10)	952.881	0.32	0.91	2.19
R(8)	967.707	1.96,^b 0.41^c	3.08,^b 0.88^c	4.53,^b 2.03^c
R(10)	969.139	0.40,^b 0.34^c	0.81,^b 0.74^c	1.55,^b 1.46^c
R(12)	970.547	1.00,^d,^b 0.97^d,^c	2.12,^b 2.07^c	3.32,^b 3.27^c
R(14)	971.930	0.97,^d,^b 0.92^d,^c	1.81,^b 1.75^c	2.63,^b 2.56^c
R(16)	973.289	0.78^d	1.70	2.59
R(18)	974.622	0.61^d	1.22	1.88
R(20)	975.930	5.49^d	11.0	16.8
R(22)	977.214	0.84^d	1.66	2.67
R(24)	978.472	0.50	1.12	1.90
R(26)	979.705	0.49	1.03	1.78
R(28)	980.913	0.40	0.92	1.66
R(30)	982.096	0.46^d	1.07	1.97
R(32)	983.252	0.40	1.09	1.96

Laser line (001-II)	Frequency (cm⁻¹)	Absorption coefficients^a (10⁻⁶ cm⁻¹)

		5.0 Torr	10.0 Torr	15.0 Torr
P(32)	1035.474	0.42,^b 0.39^c	0.85,^b 0.82^c	1.47,^b 1.43^c
P(30)	1037.434	0.39	0.77	1.39
P(28)	1039.369	1.30^d	2.72^d	4.46^d
P(26)	1041.279	0.41	0.77	1.37
P(24)	1043.163	0.41,^b 0.37^c	0.93,^b 0.89^c	1.57,^b 1.52^c
P(22)	1045.022	0.47,^b 0.44^c	0.96,^b 0.92^c	1.62,^b 1.58^c
P(20)	1046.854	0.51,^b 0.36^c	1.09,^b 0.88^c	1.69,^b 1.44^c
P(18)	1048.661	0.37,^b 0.35^c	0.89,^b 0.86^c	1.43,^b 1.40^c
P(16)	1050.441	0.47,^b,^d 0.45^c,^d	1.02,^b,^d 1.00^c,^d	1.5 8,^b,^d 1.56^c,^d
P(14)	1052.196	0.41,^b 0.38^c	1.03,^b 1.00^c	1.58,^b 1.55^c
P(12)	1053.924	0.43,^b 0.36^c	0.86,^b 0.77^c	1.50,^b 1.40^c
P(10)	1055.625	1.15^d	2.82^d	3.86^d
R(10)	1071.884	0.35	0.83	1.25
R(12)	1073.278	0.44^d	1.17^d	1.88^d
R(14)	1074.646	1.48^d	3.51^d	5.24^d
R(16)	1075.988	1.53,^b,^d 0.57^c,^d	2.88,^b,^d 1.60^c,^d	3.54,^b,^d 2.10^c,^d
R(18)	1077.303	0.43	0.99	1.45
R(20)	1078.591	0.40	0.93	1.41
R(22)	1079.852	0.40	0.91	1.38
R(24)	1081.087	0.39	0.95	1.47
R(26)	1082.296	0.36	0.84	1.35
R(28)	1083.479	0.41,^b 0.38^c	0.97,^b 0.93^c	1.42,^b 1.38^c
R(30)	1084.635	6.21,^b 1.40^c	8.25,^b 1.65^c	9.36,^b 1.93^c
R(32)	1085.765	0.58^d	1.27^d	1.85^d

Abstract

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Tables (3)

Equations (3)

Applied Optics