Saturation Spectroscopy with the NH3 Laser

  • K. J. Siemsen
  • A. A. Madej
  • J. Reid
Conference paper

Abstract

The NH3 laser, optically pumped by CO2 laser radiation at 9.2 μm, operates at 12.08 μm wavelength and has been demonstrated to be capable of a short term frequency stability of a few hundred Hertz [1]. Since the laser radiation is strongly absorbed in NH3 one could gain additional long term stability by locking the laser to a saturated absorption dip in NH3. The precision of the lock would be considerably improved if the 3 hyperfine structure components of the 12 μm sP(7,0) transition could be resolved. However, using the present published value for the upper state quadrupole coupling constant (eqQ)v 2 = 1,a [2] the calculated separation of these components was uncertain by ≥ 100 kHz.

References

  1. 1.
    K.J. Siemsen, E. Williams and J. Reid: Opt. Lett 12, 879 (1987)CrossRefADSGoogle Scholar
  2. 2.
    G. Magerl, W. Schupita, J. Frye, W. Kreiner and T. Oka: J. Mol. Spectr. 107, 72 (1984)CrossRefADSGoogle Scholar

Copyright information

© Springer-Verlag Berlin, Heidelberg 1989

Authors and Affiliations

  • K. J. Siemsen
    • 1
  • A. A. Madej
    • 1
  • J. Reid
    • 2
  1. 1.National Research Council of CanadaOttawaCanada
  2. 2.Lumonics Research Ltd.KanataCanada

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