L. S. Masukidi, J.-G. Lahaye, B. Coveliers, and A. Fayt, "Intracavity CO-laser Stark spectrometer from 2063 to 1228 cm−1," J. Opt. Soc. Am. B 4, 1177-1181 (1987)
A liquid-nitrogen-cooled CO gain tube is used in our intracavity laser Stark spectrometer and extends its spectral range from 2063 to 1228 cm−1. Stark spectra of carbonyl sulfide (OCS), essentially ν3 the band and the associated hot bands, are presented. From those measurements we deduce the vibrational dependence of the dipole moment of the OCS as a function of v3 and its equilibrium dipole moment.
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Technical Features of the Intracavity Stark Spectrometer Shown in Fig. 1a
Element
Position (m)
R (m)
w (mm)
MC1, R = 0.5 m (concave)
0
0.5
1.25
Stark cell (center)
0.400
∞
0.564
Stark cell (end)
0.600
0.40
0.80
MP1
0.985
0.65
1.74
MC2, R = 2 m (concave)
1.000
1.07/14.58
2.97
MP2
1.015
18.22
2.89
W (intermediate waist)
2.414
∞
2.78
MC3, R = 7.5 m (concave)
3.910
17.23/3.20
2.91
Grating
6.550
∞
1.95
The position is longitudinal, neglecting the lateral deviation (45 cm) on MC2. R is the radius of curvature of the wave front, and w is the spot size for a 5-μm beam (for other wavelengths,
).
Uncertainties are the global uncertainties10 that include field and frequency uncertainties (300 kHz for CO2, 1 MHz for CO). E, symmetrical = lower; F, antisymmetrical = upper.10
From Ref. 11 for a CO2 laser.
From Ref. 12 for a CO laser.
Uncertainties (one standard deviation) are given in the last digits.
Tables (3)
Table 1
Technical Features of the Intracavity Stark Spectrometer Shown in Fig. 1a
Element
Position (m)
R (m)
w (mm)
MC1, R = 0.5 m (concave)
0
0.5
1.25
Stark cell (center)
0.400
∞
0.564
Stark cell (end)
0.600
0.40
0.80
MP1
0.985
0.65
1.74
MC2, R = 2 m (concave)
1.000
1.07/14.58
2.97
MP2
1.015
18.22
2.89
W (intermediate waist)
2.414
∞
2.78
MC3, R = 7.5 m (concave)
3.910
17.23/3.20
2.91
Grating
6.550
∞
1.95
The position is longitudinal, neglecting the lateral deviation (45 cm) on MC2. R is the radius of curvature of the wave front, and w is the spot size for a 5-μm beam (for other wavelengths,
).
Uncertainties are the global uncertainties10 that include field and frequency uncertainties (300 kHz for CO2, 1 MHz for CO). E, symmetrical = lower; F, antisymmetrical = upper.10
From Ref. 11 for a CO2 laser.
From Ref. 12 for a CO laser.