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  • LASERS AND MASERS  (3)
  • 32.70.Fw  (1)
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  • 1
    Electronic Resource
    Electronic Resource
    Lifetime measurements of the 3D3/2 and 3D5/2 metastable states in CaII (1993)
    Springer
    The European physical journal 25 (1993), S. 295-298 
    Details
    ISSN: 1434-6079
    Keywords: 32.70.Fw ; 32.80.Pj
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The lifetime of the metastable 3D3/2 and 3D5/2 states of Ca+ ions is determined in a r.f. ion trap by laser excitation of this levels and subsequent time delayed probing of the state population by a second laser. In a buffer gas atmosphere of about 10−5−10−6 mbar of He we observe quenching to the ground state and strong finestructure mixing of the two D-states. This mixing allowes only the determination of the combined lifetime. Our result of τ(3D)=1.24(39) s is in good agreement with theoretical calculations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01437293
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    Paper (German National Licenses)
    Fulltext
  • 2
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    Pressure effects on the frequency of continuous-wave optically pumped far-infrared lasers (1984)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: The frequency of the 170.6-micron CW CH3OH optically pumped laser emission has been remeasured at different pressures without observing the pressure shift observed by Lawandy and Koepf (1980). The far-infrared frequency was synthesized with two stabilized CO2 lasers. No measurable pressure shift over the operating pressure range of the laser was observed, and the frequency was confirmed to be 1 757 526.3 MHz. However, competing lasing lines were found to produce spurious effects on the frequency. These effects may explain the apparent shifts.
    Keywords: LASERS AND MASERS
    Type: Optics Letters (ISSN 0146-9592); 9; 443
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Accurate frequency of the 119 micron methanol laser from tunable far-infrared absorption spectroscopy (1990)
    In:  Other Sources
    Details
    Publication Date: 2019-07-12
    Description: High-accuracy absorption spectroscopy of CH3OH in the far infrared is discussed. In addition to 22 transitions in the ground state, the frequency of the (n, tau, J, K), (0, 1, 16, 8) to (0, 2, 15, 7) transition in the nu5 excited vibrational level, which is responsible for the laser emission at 119 microns, was measured. The measured frequency is 2,522,782.57(10) MHz at zero pressure, with a pressure shift of 6.1(32) kHz/Pa (0.805/420/ MHz/torr). An accurate remeasurement of the laser emission frequency has also been performed, and the results are in good agreement.
    Keywords: LASERS AND MASERS
    Type: IEEE Journal of Quantum Electronics (ISSN 0018-9197); 26; 575-579
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    Sub-Doppler tunable far-infrared spectroscopy (1987)
    In:  Other Sources
    Details
    Publication Date: 2019-07-12
    Description: The first experimental observations of sub-Doppler linewidths in a cell made using tunable far-infrared radiation are reported. A double-resonance scheme has been used, combining CO2-laser infrared radiation with tunable far-infrared radiation to observe a sub-Doppler line shape in an excited vibrational state of CH3OH.
    Keywords: LASERS AND MASERS
    Type: Optics Letters (ISSN 0146-9592); 12; 867-869
    Format: text
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    NASA TECHNICAL REPORTS
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