Accurate Rotational Constants, Frequencies, and Wavelengths from 12C16O2 Lasers Stabilized by Saturated Absorption

  • F. R. Petersen
  • D. G. McDonald
  • J. D. Cupp
  • B. L. Danielson


New experimental measurements of the frequency separations of 30 pairs of 12C16O2 laser lines in the 10.4 µm band and 26 pairs in the 9.4 µm band have been made with lasers stabilized to Lamb-dip-type resonances observed in the 4.3 µm fluorescent radiation. The use of a Josephson junction as the frequency mixing element simplified the measurements. Uncertainties in existing rotational constants for the laser vibrational levels were reduced 20 to 30 times and an additional rotational constant, Hv was determined for the first time. Frequency and wavelength tables with estimated uncertainties are calculated for both bands with the new constants.


Absolute Frequency Reference Line Laser Line Josephson Junction Beat Frequency 
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Copyright information

© Plenum Press, New York 1974

Authors and Affiliations

  • F. R. Petersen
    • 1
  • D. G. McDonald
    • 1
  • J. D. Cupp
    • 1
  • B. L. Danielson
    • 1
  1. 1.Quantum Electronics and Cryogenics DivisionsNational Bureau of StandardsBoulderUSA

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