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  • CH3OH  (1)
  • FIR Laser Lines  (1)
  • 1
    Electronic Resource
    Electronic Resource
    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
    Keywords: waveguide CO2 lasers ; new FIR laser lines ; CH3OH ; 13CH3OH
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: 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.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01010879
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    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
    Keywords: FIR Laser Lines ; Methanol's Isotopes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: 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.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02265874
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    Paper (German National Licenses)
    Fulltext
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