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  • 42.65  (16)
  • Springer  (16)
  • 2015-2019
  • 1980-1984  (16)
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  • Springer  (16)
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Year
  • 11
    Electronic Resource
    Electronic Resource
    Generation of coherent ultraviolet radiation in the 330 nm region by multiphoton excitation of sodium vapor (1984)
    Springer
    Applied physics 33 (1984), S. 155-160 
    Details
    ISSN: 1432-0649
    Keywords: 42.60 ; 42.65
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We report the observation of coherent uv emission at 330.2±0.5 nm when sodium vapor in a heatpipe is irradiated with a pulsed visible dye laser with output wavelength in the 570–595 nm region. It is found that intense uv emission can be produced from Na atoms as well as from Na2 molecules. The excitation functions and their dependence on vapor density and laser power density are presented and the mechanisms for producing the emission are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00688522
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  • 12
    Electronic Resource
    Electronic Resource
    Vibrational relaxation of dye molecules investigated by ultrafast induced dichroism (1982)
    Springer
    Applied physics 27 (1982), S. 115-122 
    Details
    ISSN: 1432-0649
    Keywords: 33 ; 42.65
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Theoretical and experimental data are presented on the propagation of picosecond pulses in weakly excited dye solutions. It is shown that the so called “coherence peak” of the induced dichroism observed at short delay times depends on the vibronic relaxation and the excited state absorption of the dye molecules. Interpretation of the experimental results is considerably facilitated at low excitation level. The vibrational relaxation time in theS 1 state of phenoxazone 9 was measured to be τ v =0.8±0.3 ps, 0.7±0.2 ps and 0.7±0.2 ps, respectively, for the solvents dioxane, solid polystyrene and CCl4. For rhodamine 6 G in ethanol we find τ v =0.5±0.2 ps.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00694635
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  • 13
    Electronic Resource
    Electronic Resource
    Harmonic mixing in a cosine potential for large damping and arbitrary field strengths (1982)
    Springer
    Applied physics 28 (1982), S. 335-339 
    Details
    ISSN: 1432-0649
    Keywords: 72.20 ; 42.65
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A complete numerical treatment is given for the dc harmonic mixing signal of two ac electric fields of frequences ω and 2ω. Mixing occurs due to a charged Brownian particle in a cosine pinning potential. Nonlinear responses to pinning potential strength as well as to ac field strengths are computed using the method of matrix continued fraction expansion within a Smoluchowski treatment. Relevant ranges of all the parameters of the model are considered, i.e. strength of pinning potential, fundamental frequency, the two ac field strengths as well as temperature and the phase relation between the exciting fields. It is found that strong deviations from the predictions of cubic response theory occur at scaling field strengths sufficient to give the charge an energy gain ofk BT when it traverses one potential trough. For even larger field strengths the harmonic mixing signal falls off rapidly. Higher order than cubic responses also show up in a peculiar dependence of the mixing signal on the phase angle between the ac fields.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00686363
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  • 14
    Electronic Resource
    Electronic Resource
    Numerical study on transmission of multimode laser pulses by dye molecules (1980)
    Springer
    Applied physics 23 (1980), S. 209-214 
    Details
    ISSN: 1432-0630
    Keywords: 42.65
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract A theoretical model and a numerical study of the transmission of multimode laser pulses by malachite green dye are presented. Excited state absorption is taken into account. The transmitted pulses exhibit increased intensity fluctuations moderated by the excited state absorption. Reference is made to recent experimental results.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00899720
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  • 15
    Electronic Resource
    Electronic Resource
    Tunable infrared generation using the 6s−5d Raman transition in caesium vapour (1980)
    Springer
    Applied physics 21 (1980), S. 199-204 
    Details
    ISSN: 1432-0630
    Keywords: 42.60 ; 42.65
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract Coherent infrared radiation tunable between 1.6 and 3.2 μm was generated with a pulsed dye laser by 6s−5d 5/2 stimulated electronic Raman scattering in caesium vapour. We describe a technique using thermal dissociation to reduce the density of caesium dimers in a heat-pipe oven, which produced a factor of 7 reduction in Raman threshold. The threshold displayed a marked dependence on pump bandwidth.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00886169
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  • 16
    Electronic Resource
    Electronic Resource
    Investigation of the spatial coherence of a laser beam by a laser-induced grating method (1980)
    Springer
    Applied physics 23 (1980), S. 299-302 
    Details
    ISSN: 1432-0630
    Keywords: 42.30 ; 42.55 ; 42.65
    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 spatial coherence function |Γ(s)| of ruby laser pulses has been measured by self-diffraction at a laser-induced grating depending on the distances between two points in the beam profile. The spatial coherence of the laser beam was changed by operating the laser in the fundamental transverse mode, in a transverse multimode and by applying different pump powers. The degree of spatial coherence was experimentally found to be a Gaussian, as described by the Collett-Wolf model. The new method for measuring the spatial coherence function |Γ(s)| is described and possible improvements are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00914915
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