Tunable te-CO2 laser-pumped formaldehyde far-infrared lasers: Offsets, assignment, and superfluorescence

  • Yasuo Horiuchi
  • Yoshio Nishi
  • Noburu Sokabe
  • Akira Murai


Sixty and three absorption transitions in D2CO and H2CO, respectively, have produced a number of far infrared laser lines when they are pumped by an etalon-tuned TE-CO2 laser. Almost all the absorption transitions pumped previously by a free runing TE-CO2 laser have been efficiently pumped by the etalon tuned CO2 laser and found to have offset within ±500 MHz from the line-center of the relevant CO2 pump lines. 22 (1) absorption and 63 (4) emission lines of D2CO (H2CO) are assigned. Some of these lines have generated superfluorescence. In paticular, the D2CO 319-μm line pumped by CO2-9P(32) delivered an output energy of approximately one half that of the well-known D2O 66-μm. It is shown that a large electric dipole moment and an appreciable amount of fractional population in the lower level of the pump transition of this line are responsible to the superfluorescence.

Key Words

optical pumping FIR laser D2CO H2CO etalontuned TE-CO2 laser assignments superfluorescence 


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Copyright information

© Plenum Publishing Corporation 1985

Authors and Affiliations

  • Yasuo Horiuchi
    • 1
  • Yoshio Nishi
    • 1
  • Noburu Sokabe
    • 1
  • Akira Murai
    • 1
  1. 1.Department of Applied Physics, Faculty of EngineeringOsaka City UniversityOsakaJapan

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