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  • 1
    Electronic Resource
    Electronic Resource
    Far-infrared self-broadening and pressure shift measurements of methyl cyanide (1993)
    Springer
    International journal of infrared and millimeter waves 14 (1993), S. 1643-1655 
    Details
    ISSN: 1572-9559
    Keywords: far-infrared spectrometer ; methyl cyanide ; pressure broadening ; pressure shift
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Pressure shifts and self-broadening parameters of the J=43←42, J=44←43, J=56←55 and J=68←67 sub-bands of the1A1 ground state of CH3C14N up to K=10 were determined using the NIST tunable far-infrared (TuFIR) spectrometer. The pressure shift agrees well with theoretical predictions made using Anderson-Tsao-Curnutte theory. The self-broadening parameter shows the expected K depencence. However, the predictions are systematically too large for decreasing J. The influence of the TuFIR power spectrum on the derived experimental parameters was evaluated and a comparison was made between two-wave and three-wave mixing spectroscopy.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02096222
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  • 2
    Electronic Resource
    Electronic Resource
    New Far-Infrared Laser Lines and Frequency Measurements of Acetaldehyde and Vinyl Fluoride (1998)
    Springer
    International journal of infrared and millimeter waves 19 (1998), S. 719-726 
    Details
    ISSN: 1572-9559
    Keywords: far-infrared laser ; frequency measurement ; acetaldehyde (CH3CHO) ; vinyl fluoride (CH2CHF) ; cw CO2 laser ; new lines
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Eight far-infrared laser lines have been obtained by optically pumping acetaldehyde (CH3CHO) and nine by pumping vinyl fluoride (CH2CHF) with a cw CO2 laser. The far-infrared laser structure used a metal-dielectric waveguide cavity. This is the first reported observation of four of the laser lines in acetaldehyde. In this work, we measure the frequency, optimum pressure of operation, relative intensity, relative polarization, and pump offset from CO2 laser-line center.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1022646225018
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  • 3
    Electronic Resource
    Electronic Resource
    Far infrared laser frequencies of CH3OD and N2H4 (1991)
    Springer
    International journal of infrared and millimeter waves 12 (1991), S. 1161-1166 
    Details
    ISSN: 1572-9559
    Keywords: CH3OD ; N2H4 ; molecular laser lines ; laser frequency measurements ; optically pumped far infrared lasers
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The frequencies of 26 laser lines with wavelengths between 57 and 534 μm have been measured in the optically pumped laser gases CH3OD and N2H4. A pair of stabilized cw 12CO 2 lasers was used as a frequency standard for the heterodyne frequency measurements. Seven of the 26 lines are new.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01008558
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  • 4
    Electronic Resource
    Electronic Resource
    Optically-Pumped Far-Infrared Laser Lines in Hydrazine, Methanol, Heavy Water, and Ammonia: New Laser Lines and Frequency Measurements (2000)
    Springer
    International journal of infrared and millimeter waves 21 (2000), S. 725-730 
    Details
    ISSN: 1572-9559
    Keywords: hydrazine ; methanol ; heavy water ; ammonia ; new far-infrared laser lines ; optically pumped far-infrared laser ; laser frequencies ; relative intensity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A far-infrared laser cavity designed to favor short-wavelength laser lines was used to generate optically-pumped far-infrared laser radiation. New far-infrared laser lines were discovered in hydrazine, heavy water, ammonia, and several short-wavelength lines previously discovered in methanol were observed. Wavelength, frequency, and relative intensity measurements were performed on laser lines in the wavelength range 42.4 to 253.7 μm. Each far-infrared frequency measurement was obtained by mixing the far-infrared radiation with radiation from two reference CO2 lasers and from a microwave synthesizer in a metal-insulator-metal diode. The pump laser was a high-Q Fabry Perot resonator oscillating on 275 grating-selected laser lines including regular, sequence, and hot band lines.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1026456425454
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  • 5
    Electronic Resource
    Electronic Resource
    Laser Lines and Frequency Measurements of Fully Deuterated Isotopomers of Methanol (1998)
    Springer
    International journal of infrared and millimeter waves 19 (1998), S. 465-473 
    Details
    ISSN: 1572-9559
    Keywords: 12CD3OD ; 13CD3OD ; fully deuterated isotopomers ; new laser lines ; far-infrared laser ; frequency measurement ; CO2 laser pump
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Fully deuterated isotopomers of methanol (12CD3OD and 13CD3OD) were optically pumped with a CO2 laser. Five new far-infrared laser lines were discovered in 12CD3OD and 25 in 13CD3OD in the range 43.697 to 719.426 μm. The frequencies of these new and some previously reported laser lines, the pump offset, the relative polarization, the relative intensity, and the optimum pressure of operation were measured.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1022511827416
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  • 6
    Electronic Resource
    Electronic Resource
    Optically-Pumped Far-Infrared Laser Lines of Methanol Isotopomers: 12CH3OH, 12CH3OD, and 12CH2DOH (2000)
    Springer
    International journal of infrared and millimeter waves 21 (2000), S. 731-737 
    Details
    ISSN: 1572-9559
    Keywords: 12CD3OH ; 12CH3OD ; 12CH2DOH ; new far-infrared laser lines ; optically-pumped far-infrared laser ; laser frequencies ; relative intensity ; relative polarization ; pump-frequency offset
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Twenty-seven new far-infrared laser lines from the isotopomers of methanol: 12CD3OH, 12CH3OD, and 12CH2DOH, were obtained by optically-pumping the molecules with an efficient cw CO2 laser. The CO2 laser provided pumping from regular, sequence, and hot-band CO2 laser transitions. The 2-m long far-infrared cavity was a metal-dielectric waveguide closed by two, flat end mirrors. Several short-wavelength (below 100 μm) lines were observed. The frequencies of 28 laser lines observed in this cavity (including new lines and already known lines) were measured with a fractional uncertainty limited by the fractional resetability of the far-infrared laser cavity, of 2 parts in 107.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1026408509524
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  • 7
    Electronic Resource
    Electronic Resource
    Optically Pumped Far-Infrared Laser Lines of Methanol Isotopomers: 12CD3OH, 12CH3OD, and 12CH2DOH (2000)
    Springer
    International journal of infrared and millimeter waves 21 (2000), S. 477-483 
    Details
    ISSN: 1572-9559
    Keywords: 12CD3OH ; 12CH3OD ; 12CH2DOH ; new far-infrared laser lines ; optically pumped far-infrared laser ; laser frequencies ; relative intensity ; relative polarization ; pump-frequency offset
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Twenty-seven new FIR, far-infrared, laser lines from the isotopomers of methanol: 12CD3OH, 12CH3OD, and 12CH2DOH, were obtained by optically pumping the molecules with an efficient cw CO2 laser. The CO2 laser provided pumping from regular, sequence, and hot-band CO2 laser transitions. The 2 m long far-infrared cavity was a metal-dielectric waveguide closed by two, flat end mirrors. Several short-wavelength (below 100 μm) lines were observed. The frequencies of 28 laser lines observed in this cavity (including new lines and already known lines) were measured with a fractional uncertainty limited by the fractional resetability of the far-infrared laser cavity, of 2 parts in 107.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1006667300438
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  • 8
    Electronic Resource
    Electronic Resource
    New NH2H4 far-infrared laser lines and their frequencies (1996)
    Springer
    International journal of infrared and millimeter waves 17 (1996), S. 1041-1047 
    Details
    ISSN: 1572-9559
    Keywords: N2H4 new laser lines ; far-infrared ; frequency measurements
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We report 25 new far-infrared laser lines and 26 heterodyne frequency measurements in hydrazine. The frequencies range from 1.0 to 5.5 THz with most of the frequencies between 2.5 and 4.0 THz. The lines were generated in a high frequency, far-infrared Fabry-Perot laser cavity pumped by a CO2 laser. The cavity has a high Q for wavelengths below 150 µm and uses variable coupling to optimize the power for each line.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02101435
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  • 9
    Electronic Resource
    Electronic Resource
    Frequency measurements of 3 to 11 THz laser lines of CH3OH (1996)
    Springer
    International journal of infrared and millimeter waves 17 (1996), S. 1049-1054 
    Details
    ISSN: 1572-9559
    Keywords: Frequency Measurements ; High Frequency ; CH3OH ; Far-Infrared Laser
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We measured the frequencies of 12 far-infrared laser lines generated in a high- frequency Fabry-Perot laser cavity containing methanol, pumped by a CO2 laser. The frequencies are in the range 2.8 to 11.4 THz (105.4 to 26.2 µm). Ten of the measured frequencies are higher than 7 THz, and help to fill the laser frequency gaps in this region. Five of the measured lines are new. The 11.4 THz line has the highest frequency of an optically pumped laser ever measured with the CO2 laser heterodyne technique.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02101436
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  • 10
    Electronic Resource
    Electronic Resource
    New FIR laser lines and frequency measurements for optically pumped CD3OH (1987)
    Springer
    International journal of infrared and millimeter waves 8 (1987), S. 653-662 
    Details
    ISSN: 1572-9559
    Keywords: CD3OH laser lines ; laser frequency measurements ; optically pumped FIR laser ; new laser lines ; relative intensity ; relative polarization
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Twenty new cw FIR laser lines in CD3OH, optically pumped by a CO2 laser, are reported. The frequencies of 39 of the stronger laser lines were measured relative to stabilized CO2 lasers with a fractional uncertainty, as determined by the reproducibility of the FIR frequency itself, of 2 parts in 107.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01010637
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