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  • 42.55  (3)
  • 13CH3OH  (1)
  • FIR Laser Lines  (1)
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  • 1
    Digitale Medien
    Digitale Medien
    New large offset far-infrared laser lines from CD3OH (1987)
    Springer
    Applied physics 44 (1987), S. 111-117 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.55
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The CD3OH molecule has been investigated for new far-infrared laser lines by optically pumping with a cw waveguide CO2 laser. The increased tunability (300 MHz) with respect to a conventional CO2 laser permits to pump many new CD3OH lines. As a consequence 108 new laser lines have been discovered, ranging from 42.9 to 1155 μm in wavelength. On some lines the effect of an electric Stark field has been investigated demonstrating a laser frequency tuning. The total number of known FIR laser lines from CD3OH is increased to about 340 making this molecule the most prolific together with CH3OH.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00694203
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    New far infrared laser lines from 13CH2F2 and frequency measurements (1991)
    Springer
    Applied physics 52 (1991), S. 32-35 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.55
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract We report new FIR laser lines from 13CH2F2 molecules optically pumped by a waveguide CO2 laser. The increased tunability (300 MHz) with respect to a conventional CO2 laser allows the pumping of 13CH2F2 vibrational transitions of large offset. 34 new laser lines have been discovered, ranging from 113.1 μm to 491.4 μm in wavelength, thus increasing the number of known FIR laser lines from this important molecule to 99. For all the new lines and many (36) of those known previously, precise offset measurements through the transferred Lamb-dip technique were performed. The frequency of six new laser lines was also directly measured by heterodyne detection with known laser lines.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00405683
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  • 3
    Digitale Medien
    Digitale Medien
    IR and FIR spectroscopy of 13CD3OH around the 10P(22) and 10P(24) CO2 laser lines: New FIR laser emissions, frequency measurements and assignments (1992)
    Springer
    Applied physics 54 (1992), S. 24-28 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.55
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract By using high resolution infrared Fourier transform data on 13CD3OH and the 10P(22) and 10P(24) lines of a waveguide CO2 laser to optically pump this methanol isotope, eight new FIR laser lines were observed. The frequencies of five laser lines were directly measured by heterodyne detection with already known laser lines. Particularly interesting are the lines pumped by the 10P(24) line, since a triade of emissions could be completely assigned.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00331730
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 4
    Digitale Medien
    Digitale Medien
    Acoustooptic extension of the frequency tunability of CW CO2 lasers: New FIR lasers emissions from CH3OH and13CH3OH (1991)
    Springer
    International journal of infrared and millimeter waves 12 (1991), S. 449-471 
    Details
    ISSN: 1572-9559
    Schlagwort(e): waveguide CO2 lasers ; new FIR laser lines ; CH3OH ; 13CH3OH
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract We have increased the frequency tunability of our CW waveguide CO2 lasers by means of an acoustooptic amplitude modulator, operating at the fixed frequency of 90 MHz. The up-shifted, or down-shifted, laser optical sideband can be generated independently by adjusting the orientation of the modulator. The efficiency is larger than 50%. The frequency tunability of the CO2 laser around each laser line is thus increased by 180 MHz. To demonstrate the possibilities of this method, a source composed of the above modulator and of a CW, 300 MHz tunable waveguide CO2 laser has been used for the search of new large offset FIR laser lines from optically pumped CH3OH and13CH3OH molecules. As a result 15 and 10 new large offset laser lines were discovered respectively. New assignments of some laser lines are also proposed. We have also measured the Stark effect, the offset, and the polarization of other already known lines. In particular a Stark effect frequency tuning of about 1 GHz is demonstrated for a laser line at 208.399 μm.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01010879
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  • 5
    Digitale Medien
    Digitale Medien
    A review of optically pumped far-infrared laser lines from methanol isotopes (1994)
    Springer
    International journal of infrared and millimeter waves 15 (1994), S. 1-44 
    Details
    ISSN: 1572-9559
    Schlagwort(e): FIR Laser Lines ; Methanol's Isotopes
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The technique of optical pumping in polar molecules is the most efficient for Far-Infrared (FIR) laser generation, providing also a versatile and powerful tool for molecular spectroscopy in this spectral region. Methanol (CH3OH) and its isotopic varieties are the best media for optically pumped FIR laser, with over thousand lines observed, and the most widely used for investigations and applications. In this sense, it is important organize and make available catalogues of FIR laser lines as complete as possible. Since the last critical reviews of 1984 [1] on methanol and its isotopic varieties [2,3,4], over hundred papers have been published dealing with hundreds of new FIR laser lines. In 1992 a review of FIR laser lines from CH3OH was presented [5]. In this communication we extend this work to the other methanol isotopes, namely CH3OD, CD3OH, CD3OD,13CH3OH,13CD3OH,13CD3OD, CH3 18OH, CH2DOH, CHD2OH and CH2DOD.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02265874
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