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  • 1
    Electronic Resource
    Electronic Resource
    New large offset far-infrared laser lines from CD3OH (1987)
    Springer
    Applied physics 44 (1987), S. 111-117 
    Details
    ISSN: 1432-0649
    Keywords: 42.55
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: 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.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00694203
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    New far infrared laser lines from 13CH2F2 and frequency measurements (1991)
    Springer
    Applied physics 52 (1991), S. 32-35 
    Details
    ISSN: 1432-0649
    Keywords: 42.55
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: 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.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00405683
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    New FIR laser lines from CD3OD optically pumped by a CO2 waveguide laser (1991)
    Springer
    Applied physics 52 (1991), S. 36-41 
    Details
    ISSN: 1432-0649
    Keywords: 42.55
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract In this work we report new FIR laser lines from CD3OD optically pumped by a CO2 waveguide laser. The wide tunability of this laser (290 MHz) makes it possible to pump absorption lines with large frequency offset relative to the CO2 laser line center, which are not possible by using conventional CO2 lasers. As a consequence 19 new laser lines have been discovered, ranging from 38.0 μm to 455.2 μm in wavelength. For all lines, precise frequency offset measurements between the CO2 line center and the center of the absorber CD3OD line were performed using the transferred Lamb-dip technique. We also present direct Doppler-free offset measurements of infrared absorption, obtained within the FIR laser cavity itself, using optoacoustic detection.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00405684
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    High efficiency cw far infrared lasers at 119 μm and 127 μm (1989)
    Springer
    Applied physics 48 (1989), S. 305-309 
    Details
    ISSN: 1432-0649
    Keywords: 42.55
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The optically pumped FIR laser lines at 119 μm from CH3OH and at 127 μm from13CD3OH are known to be the most powerful in the far infrared spectral region. We report on efficiency measurements for our waveguide laser system. The effect of various parameters was investigated, resulting in the highest efficiency ever reported for the 119 μm line. The Stark effect and others parameters of the 127 μm were measured, and a new13CD3OH laser line at 175 μm discovered, with the same pump transition. These measurements are helpful for completing the assignment already proposed for the 127 μm line.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00694186
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    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
    Keywords: 42.55
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: 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.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00331730
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    A new efficient far-infrared optically pumped laser gas: CH3 18OH (1989)
    Springer
    Applied physics 48 (1989), S. 299-304 
    Details
    ISSN: 1432-0649
    Keywords: 42.55
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The12CH3 18OH molecule has been investigated for new far-infrared laser lines by optically pumping it with a cw waveguide CO2 laser. The larger tunability (318 MHz) with respect to a conventional CO2 laser permits the pumping of many12CH3 18OH lines. As a consequence 100 new laser lines have been discovered, ranging from 34.6 μm to 653.2 μm in wavelength. The infrared spectrum of12CH3 18OH has been observed and all the fundamental vibration energies measured.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00694185
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    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
    Keywords: 42.55H ; 33.60 ; 06.30F
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: 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.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00885512
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    Paper (German National Licenses)
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