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Optically Pumped Far-Infrared Laser Lines of Methanol Isotopomers: 12CD3OH, 12CH3OD, and 12CH2DOH

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Abstract

Twenty-seven new FIR, far-infrared, laser lines from the isotopomers of methanol: 12CD3OH, 12CH3OD, and 12CH2DOH, were obtained by optically pumping the molecules with an efficient cw CO2 laser. The CO2 laser provided pumping from regular, sequence, and hot-band CO2 laser transitions. The 2 m long far-infrared cavity was a metal-dielectric waveguide closed by two, flat end mirrors. Several short-wavelength (below 100 μm) lines were observed. The frequencies of 28 laser lines observed in this cavity (including new lines and already known lines) were measured with a fractional uncertainty limited by the fractional resetability of the far-infrared laser cavity, of 2 parts in 107.

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Authors and Affiliations

  1. Instituto de Física, Gleb Wataghin, Departamento de Eletrônica Quântica, Universidade Estadual de Campinas (UNICAMP), 13083-970, Campinas, SP, Brazil

    E. C. C. Vasconcellos & S. C. Zerbetto

  2. Time and Frequency Division, National Institute of Standards and Technology, Boulder, Colorado, 80303-3328, U.S.A.

    L. R. Zink & K. M. Evenson

Authors
  1. E. C. C. Vasconcellos
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  2. S. C. Zerbetto
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  3. L. R. Zink
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  4. K. M. Evenson
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Vasconcellos, E.C.C., Zerbetto, S.C., Zink, L.R. et al. Optically Pumped Far-Infrared Laser Lines of Methanol Isotopomers: 12CD3OH, 12CH3OD, and 12CH2DOH. International Journal of Infrared and Millimeter Waves 21, 477–483 (2000). https://doi.org/10.1023/A:1006667300438

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  • DOI: https://doi.org/10.1023/A:1006667300438

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