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  • Far Infrared laser  (2)
  • frequency measurement  (2)
  • 33.60  (1)
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  • 1
    Digitale Medien
    Digitale Medien
    Stark effect on CH3OH and CH3F FIR lasers: Large frequency tuning and resolved structures (1979)
    Springer
    Applied physics 18 (1979), S. 261-270 
    Details
    ISSN: 1432-0630
    Schlagwort(e): 42.55H ; 33.60 ; 06.30F
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau , Physik
    Notizen: Abstract The operation of a cw FIR laser in the presence of a strong electric field is described. A hybrid metal-dielectric waveguide is used and the cavity length is scanned to study how the frequency and power of the laser depend on the field strength. The results have also been checked by heterodyning with a conventional reference laser. We report the results obtained for the 496 μm line of CH3F and the 70.5 μm and 119 μm lines of CH3OH. A large frequency tunability of almost ±40 MHz is obtained in the best case with power levels in the mW range. A very simple theoretical model accounts for the experimental results. We also report the appearance of a new FIR line at about 204 μm when CH3OH is pumped by the 9 μmP(34) of CO2 in the presence of an electric field larger than 1.2 KV/cm.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00885512
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Frequency measurements of far infrared laser lines by means of MIM point contact diodes (1994)
    Springer
    International journal of infrared and millimeter waves 15 (1994), S. 1347-1360 
    Details
    ISSN: 1572-9559
    Schlagwort(e): methanol ; Far Infrared laser ; frequency measurement
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract We present frequency measurements of 85 Far Infrared (FIR) laser lines ranging from 2 748 GHz to 421 GHz. We use the heterodyne technique of mixing FIR laser transitions and microwave radiation on MIM point contact diodes to determine the FIR frequencies.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02096088
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  • 3
    Digitale Medien
    Digitale Medien
    Assignments of methanol laser lines by frequency measurements and Fourier transform spectroscopy (1994)
    Springer
    International journal of infrared and millimeter waves 15 (1994), S. 619-633 
    Details
    ISSN: 1572-9559
    Schlagwort(e): methanol ; FIR laser ; frequency measurement
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract We have measured the frequencies of four CH3OH far-infrared laser lines that were previously known only by wavelength measurement. Two of these lines turned out to be doublets, bringing the total number of measured lines to six. We can now confirm the assignments of five of them and definitely disprove the assignments proposed for the sixth. In particular we confirm the assignments for the four strong laser lines at 205 and 208 µm pumped by the 9-P(34) CO2 laser line. These lines share a common upper level in the first excited CO-stretch state, and terminate in the upper and lower levels of a hybrid state with J=5. Heterodyne frequency measurements and conventional microwave spectroscopy show that both lines are split into two components approximately 3.5 MHz apart. The origin of this further splitting is interpreted as a perturbed K-splitting.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02096479
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  • 4
    Digitale Medien
    Digitale Medien
    Electric field effects on roto-vibrational transitions of13CD3OH1 (1995)
    Springer
    International journal of infrared and millimeter waves 16 (1995), S. 2233-2248 
    Details
    ISSN: 1572-9559
    Schlagwort(e): Stark spectroscopy ; Far Infrared laser ; methanol
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract We used a Stark-Optoacoustic cell and hybrid waveguide resonators to perform an Infrared and Far Infrared Stark Spectroscopy study on some transitions of13CD3OH. Different behaviours of the transitions in the presence of a d.c. electric field were observed. The Stark splittings of six FIR laser lines ranging from 34 to 136 MHz/kVcm−1 were determined. The analysis of the behaviour of the IR and FIR transitions in the presence of the external electric fields gives important and exclusive information on the levels involved in the transitions.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02073424
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