International Journal of Infrared and Millimeter Waves

, Volume 7, Issue 10, pp 1605–1629

Methanol laser lines from torsionally excited co stretch states, and from OH-bend, CH3-rock, and CH3-deformation states

  • J. O. Henningsen

DOI: 10.1007/BF01010761

Cite this article as:
Henningsen, J.O. Int J Infrared Milli Waves (1986) 7: 1605. doi:10.1007/BF01010761


Using a quasi-CW CO2 oscillator-amplifier combination with peak power 300 Watt, we have generated FIR laser emission in weak absorption bands of CH3OH. 40 new lines are reported, and their wavelengths are measured with a relative accuracy of 5×10−5. A total of 72 lines are assigned. 34 of these involve torsional n=1, 2, and 3 states of the CO stretch and the vibrational ground state. The remaining lines are associated with the CH3-rock, OH-bend, and CH3-deformation modes. The latter are located 1460 cm−1 above the ground state, and are pumped by simultaneous vibrational excitation and torsional deexcitation.

Key Words

optically pumped far infrared laserCH3OH

Copyright information

© Plenum Publishing Corporation 1986

Authors and Affiliations

  • J. O. Henningsen
    • 1
  1. 1.Physics Laboratory H. C. Ørsted InstituteUniversity of CopenhagenCopenhagenDenmark