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Sub-Doppler Heterodyne Frequency Measurements on OCS Near 2900 cm−1Using a CO Overtone Sideband Spectrometer

✍ Scribed by Bertold Frech; Manfred Mürtz; Peter Palm; Rüdiger Lotze; Wolfgang Urban; Arthur G Maki

Publisher
Elsevier Science
Year
1998
Tongue
English
Weight
278 KB
Volume
190
Category
Article
ISSN
0022-2852

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✦ Synopsis

We present sub-Doppler heterodyne frequency measurements on 10 rovibrational transitions of carbonyl sulfide (OCS) between 2894 and 2910 cm 01 . The measurements were made using a CO overtone laser which had limited tuneability through the generation of microwave sidebands in a CdTe crystal. With this technique the laser frequencies were shifted to the desired OCS transition frequencies. The transition frequencies could be measured with uncertainties less than 30 kHz (Dn/n Å 3 1 10 010 ) by frequency offset-locking the CO overtone laser to combination frequencies of two saturation-stabilized CO 2 laser standards. The measured transition frequencies of OCS were combined with previous sub-Doppler, Fourier transform, and microwave measurements to recalculate improved calibration tables for the 10 0 1-00 0 0, 11 1 e 1-01 1e 0, and 11 1 f 1-01 1 f 0 bands. These tables are suitable for the calibration of infrared spectrometers in the 87 THz region (near 2900 cm 01 ).

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Sub-Doppler Frequency Measurements on OC
Sub-Doppler Frequency Measurements on OCS Near 1689 and 1885 cm−1
✍ J.S. Wells; A. Dax; L. Hollberg; A.G. Maki 📂 Article 📅 1995 🏛 Elsevier Science 🌐 English ⚖ 396 KB

We have used an optical polarization heterodyne technique to measure the frequencies of two OCS lines, one near \(5.3 \mu \mathrm{m}\) and the other near \(5.9 \mu \mathrm{m}\). These sub-Doppler measurements gave \(56533766.125 \pm 0.035 \mathrm{MHz}\) for the \(2 \nu_{2}+\nu_{3} P(16)\) transition