Accurate frequencies of molecular transitions used in laser stabilization: the 3.39-μm transition in CH4 and the 9.33- and 10.18-μm transitions in CO2

The frequencies of three lasers stabilized to molecular absorptions were measured with an infrared-frequency synthesis chain extending upwards from the cesium frequency standard. The measured values are 29.442 483 315 (25) THz for the 10.18-μm R(30) transition in CO2, 32.134 266 891 (24) THz for the...

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Bibliographic Details
Published in:Applied physics letters 1973-02, Vol.22 (4), p.192-195
Main Authors: Evenson, K.M., Wells, J.S., Petersen, F.R., Danielson, B.L., Day, G.W.
Format: Article
Language:English
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Summary:The frequencies of three lasers stabilized to molecular absorptions were measured with an infrared-frequency synthesis chain extending upwards from the cesium frequency standard. The measured values are 29.442 483 315 (25) THz for the 10.18-μm R(30) transition in CO2, 32.134 266 891 (24) THz for the 9.33-μm R(10) transition in CO2, and 88.376 181 627 (50) THz for the 3.39-μm P(7) transition in CH4. The frequency of methane, when multiplied by the measured wavelength reported in the following letter, yields 299 792 456.2(1.1) m/sec for the speed of light.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.1654607