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  • 1975-1979  (2)
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  • 1
    Electronic Resource
    Electronic Resource
    The fluorescence of a molecular gas excited a strong monochromatic standing wave radiation field (1978)
    Springer
    Czechoslovak journal of physics 28 (1978), S. 141-148 
    Details
    ISSN: 1572-9486
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Among the different methods of nonlinear spectrosccpy the method of analysing the fluorescence light is useful in investigating weak absorbing molecular transitions. In this paper the fluorescence of a molecular gas in the resonator of a high-power single mode laser is investigated. By tuning the standing wave field frequency to centre of the absorption line one observes a narrow local minimum for the fluorescence. This minimum is determined by the homogeneously broadened line of the molecular transition and gives information of the different molecular relaxation processes. The influence of vibrational-rotational relaxations, velocity changing collisions and spatial inhomogeneous distribution of the population caused by the standing wave field on the width and contrast of the minimum is theoretically investigated. It will be shown, that vibrational-rotational and velocity changing collisions increase the intensity of the fluorescence. The spatial inhomogeneous distribution of population caused by the excitation decreases the contrast.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01591031
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Influence of collision processes on saturated absorption line shapes (1975)
    Springer
    Czechoslovak journal of physics 25 (1975), S. 1084-1094 
    Details
    ISSN: 1572-9486
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The effect of collision processes especially of velocity-changing collisions on the shape and contrast of the absorption dips is examined considering the dynamical Stark effect. The velocity-changing collisions cause a homogeneous saturation of the Doppler-broadened absorption profile and a decrease of the contrast of the absorption dip, which is comparable with the decrease of the contrast due to the dynamical Stark effect for saturation intensities of the order σI≃1. The influence of the dynamical Stark effect decreases with increasing pressure whereas the influence of the homogeneous saturation increases.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01798690
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    Paper (German National Licenses)
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