Zhiping Chu,1,2
Thomas D. Wilkerson,1
and Upendra N. Singh1,3
1When this work was performed the authors were with the Institute for Physical Science and Technology, University of Maryland, College Park, Maryland 20742-2431. USA
2Z. Chu is now with the University of Connecticut, Storrs, Connecticut 06269.
3U. N. Singh is now with Hughes STX Corporation, working at the Goodard Space Flight Center, Code 915, National and Aeronautics and Space Administration, Greenbelt, Maryland 20771.
Zhiping Chu, Thomas D. Wilkerson, and Upendra N. Singh, "Water-vapor absorption line measurements in the 940-nm band by using a Raman-shifted dye laser," Appl. Opt. 32, 992-998 (1993)
We report water-vapor absorption line measurements that are made by using the first Stokes radiation (930–982 nm) with HWHM 0.015 cm−1 generated by a narrow-linewidth, tunable dye laser. Forty-five absorption line strengths are measured with an uncertainty of 6% and among them are fourteen strong lines that are compared with previous measurements for the assessment of spectral purity of the light source. Thirty air-broadened linewidths are measured with 8% uncertainty at ambient atmospheric pressure with an average of 0.101 cm−1. The lines are selected for the purpose of temperature-sensitive or temperature-insensitive lidar measurements. Results for these line strengths and linewidths are corrected for broadband radiation and finite laser linewidth (0.015 cm−1 HWHM) broadening effects and compared with the high-resolution transmission molecular absorption.
You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.
You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.
You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.
You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.
These were measured by Giver et al.6 and Chevillard et al.7S0 must be multiplied by 10−24. All lines except λ = 953.594 nm are temperature insensitive.
Table 2
Positions, Energy Levels, Assignments, Measured Strengths S0, Air-broadened Lorentz Linewidths λL0 and Line Center Cross Sections σL0 for 17 H2O Absorption Lines (Temperature Insensitive) at STP Conditionsa
λ (nm, air)
ν (cm−1, vac)
E″ (cm−1)
J″ Ka″ Kc″
J′ Ka′ Kc′
v1′ v2′ v3′
S0 (cm/molecule)
γL0 (cm−1)
σL0 (cm2)
964.520
10365.00
285.22
3 3 1
3 3 0
1 2 1
19.9 ± 0.9
–
–
964.556
10364.61
285.42
3 3 0
3 3 1
1 2 1
54.5 ± 1.1
0.095 ± 0.002
183.1 ± 7.6
965.973
10349.42
206.30
3 2 2
3 2 1
1 2 1
10.2 ± 0.9
0.109 ± 0.009
29.7 ± 5.1
966.232
10346.65
134.90
2 2 1
2 2 0
1 2 1
67.4 ± 1.8
0.109 ± 0.003
197.6 ± 10.1
966.465
10344.16
136.16
2 2 0
2 2 1
1 2 1
24.3 ± 1.7
0.105 ± 0.008
73.7 ± 10.4
967.060
10337.79
212.15
3 2 1
3 2 2
1 2 1
27.9 ± 1.0
0.103 ± 0.004
86.2 ± 6.1
970.892
10296.98
173.36
3 1 2
3 1 3
1 2 1
8.4 ± 0.7
0.095 ± 0.008
28.1 ± 4.9
973.064
10274.02
206.30
3 2 2
2 2 1
1 2 1
16.0 ± 1.1
0.118 ± 0.008
43.2 ± 5.9
973.500
10269.40
212.15
3 2 1
2 2 0
1 2 1
25.2 ± 1.6
0.109 ± 0.007
73.5 ± 9.1
974.349
10260.45
136.76
3 0 3
2 0 2
1 2 1
54.2 ± 1.1
0.098 ± 0.002
176.0 ± 7.5
974.931
10254.32
173.36
3 1 2
2 1 1
1 2 1
47.1 ± 1.1
0.112 ± 0.003
134.6 ± 6.2
975.382
10249.58
300.36
4 2 3
3 2 2
1 2 1
29.5 ± 1.7
0.105 ± 0.006
89.9 ± 10.6
975.773
10245.51
224.84
4 1 4
3 1 3
1 2 1
50.4 ± 2.9
0.110 ± 0.006
146.3 ± 16.9
976.276
10240.17
222.05
4 0 4
3 0 3
1 2 1
17.9 ± 1.3
0.109 ± 0.008
52.1 ± 7.8
977.386
10228.55
275.50
4 1 3
3 1 2
1 2 1
12.2 ± 1.1
0.101 ± 0.009
38.5 ± 6.6
977.941
10222.77
326.62
5 1 5
4 1 4
1 2 1
12.8 ± 1.0
0.085 ± 0.007
48.2 ± 7.6
978.241
10219.64
325.35
5 0 5
4 0 4
1 2 1
34.0 ± 1.5
0.101 ± 0.005
107.2 ± 9.5
S0 and σL0 must be multiplied by 10−24
Table 3
Positions, Energy Levels, Assignments, Measured Strengths S0, Air-Broadened Lorentz Linewidths γL0, and Line Center Cross Sections σL0 for 14 H2O Absorption Lines (Temperature Insensitive) at STP Conditionsa
λ (nm, air)
ν (cm−1, vac)
E″ (cm−1)
J″ Ka″ Kc″
J′ Ka′ Kc′
v1′ v2′ v3′
S0 (cm/molecule)
γL0 (cm−1)
σL0 (cm2)
961.005
10402.93
782.41
7 2 5
6 2 4
2 0 1
32.3 ± 1.0
0.096 ± 0.004
106.6 ± 7.8
961.545
10397.09
920.17
9 0 9
8 0 8
2 0 1
30.3 ± 0.9
0.088 ± 0.003
110.2 ± 7.3
962.120
10390.85
79.50
2 1 2
3 1 3
1 2 1
62.1 ± 2.0
0.104 ± 0.003
190.5 ± 12.1
962.270
10389.21
488.11
4 4 1
4 4 0
1 2 1
34.7 ± 1.4
0.090 ± 0.004
122.5 ± 10.1
962.638
10385.31
42.37
1 1 0
2 1 1
1 2 1
42.9 ± 1.1
0.106 ± 0.003
128.9 ± 6.4
963.734
10373.42
23.79
1 0 1
2 0 2
1 2 1
65.5 ± 1.8
0.110 ± 0.003
189.4 ± 10.1
974.647
10363.63
382.52
4 3 2
4 3 1
1 2 1
23.7 ± 0.7
0.097 ± 0.003
77.6 ± 4.8
966.087
10348.19
79.50
2 1 2
2 1 1
1 2 1
19.4 ± 0.8
0.104 ± 0.004
59.3 ± 4.8
966.998
10338.46
37.13
1 1 1
1 1 0
1 2 1
19.2 ± 0.9
0.108 ± 0.005
56.5 ± 5.3
968.038
10327.34
42.37
1 1 0
1 1 1
1 2 1
39.0 ± 1.1
0.106 ± 0.003
117.4 ± 6.3
970.145
10304.94
23.79
1 0 1
0 0 0
1 2 1
40.2 ± 1.2
0.112 ± 0.003
113.8 ± 6.5
971.531
10290.22
79.50
2 1 2
1 1 1
1 2 1
38.8 ± 1.0
0.114 ± 0.003
108.5 ± 5.3
972.458
10280.42
95.18
2 1 1
1 1 0
1 2 1
15.5 ± 0.8
0.116 ± 0.006
42.3 ± 4.3
980.170
10199.53
447.25
5 1 5
6 1 6
1 2 1
21.8 ± 0.8
0.098 ± 0.004
70.9 ± 5.4
S0 and σL0 must be multiplied by 10−24.
Tables (3)
Table 1
Positions, Energy Levels, Assignments and Strengths S0 of the 14 H2O Absorption Lines Selected Here for Spectral Purity Confirmationa
These were measured by Giver et al.6 and Chevillard et al.7S0 must be multiplied by 10−24. All lines except λ = 953.594 nm are temperature insensitive.
Table 2
Positions, Energy Levels, Assignments, Measured Strengths S0, Air-broadened Lorentz Linewidths λL0 and Line Center Cross Sections σL0 for 17 H2O Absorption Lines (Temperature Insensitive) at STP Conditionsa
λ (nm, air)
ν (cm−1, vac)
E″ (cm−1)
J″ Ka″ Kc″
J′ Ka′ Kc′
v1′ v2′ v3′
S0 (cm/molecule)
γL0 (cm−1)
σL0 (cm2)
964.520
10365.00
285.22
3 3 1
3 3 0
1 2 1
19.9 ± 0.9
–
–
964.556
10364.61
285.42
3 3 0
3 3 1
1 2 1
54.5 ± 1.1
0.095 ± 0.002
183.1 ± 7.6
965.973
10349.42
206.30
3 2 2
3 2 1
1 2 1
10.2 ± 0.9
0.109 ± 0.009
29.7 ± 5.1
966.232
10346.65
134.90
2 2 1
2 2 0
1 2 1
67.4 ± 1.8
0.109 ± 0.003
197.6 ± 10.1
966.465
10344.16
136.16
2 2 0
2 2 1
1 2 1
24.3 ± 1.7
0.105 ± 0.008
73.7 ± 10.4
967.060
10337.79
212.15
3 2 1
3 2 2
1 2 1
27.9 ± 1.0
0.103 ± 0.004
86.2 ± 6.1
970.892
10296.98
173.36
3 1 2
3 1 3
1 2 1
8.4 ± 0.7
0.095 ± 0.008
28.1 ± 4.9
973.064
10274.02
206.30
3 2 2
2 2 1
1 2 1
16.0 ± 1.1
0.118 ± 0.008
43.2 ± 5.9
973.500
10269.40
212.15
3 2 1
2 2 0
1 2 1
25.2 ± 1.6
0.109 ± 0.007
73.5 ± 9.1
974.349
10260.45
136.76
3 0 3
2 0 2
1 2 1
54.2 ± 1.1
0.098 ± 0.002
176.0 ± 7.5
974.931
10254.32
173.36
3 1 2
2 1 1
1 2 1
47.1 ± 1.1
0.112 ± 0.003
134.6 ± 6.2
975.382
10249.58
300.36
4 2 3
3 2 2
1 2 1
29.5 ± 1.7
0.105 ± 0.006
89.9 ± 10.6
975.773
10245.51
224.84
4 1 4
3 1 3
1 2 1
50.4 ± 2.9
0.110 ± 0.006
146.3 ± 16.9
976.276
10240.17
222.05
4 0 4
3 0 3
1 2 1
17.9 ± 1.3
0.109 ± 0.008
52.1 ± 7.8
977.386
10228.55
275.50
4 1 3
3 1 2
1 2 1
12.2 ± 1.1
0.101 ± 0.009
38.5 ± 6.6
977.941
10222.77
326.62
5 1 5
4 1 4
1 2 1
12.8 ± 1.0
0.085 ± 0.007
48.2 ± 7.6
978.241
10219.64
325.35
5 0 5
4 0 4
1 2 1
34.0 ± 1.5
0.101 ± 0.005
107.2 ± 9.5
S0 and σL0 must be multiplied by 10−24
Table 3
Positions, Energy Levels, Assignments, Measured Strengths S0, Air-Broadened Lorentz Linewidths γL0, and Line Center Cross Sections σL0 for 14 H2O Absorption Lines (Temperature Insensitive) at STP Conditionsa