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  • Artikel  (15)
  • Artikel: DFG Deutsche Nationallizenzen  (15)
  • 42.80  (15)
  • 1995-1999
  • 1985-1989  (15)
  • 1985  (15)
  • Physik  (15)
  • Technik allgemein
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  • Artikel  (15)
Datenquelle
  • Artikel: DFG Deutsche Nationallizenzen  (15)
Verlag/Herausgeber
Erscheinungszeitraum
  • 1995-1999
  • 1985-1989  (15)
Jahr
Thema
  • 1
    Digitale Medien
    Digitale Medien
    Springer
    Applied physics 36 (1985), S. 17-20 
    ISSN: 1432-0649
    Schlagwort(e): 42.65 ; 42.70 ; 42.80
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The frequency-doubling performance of CdGeAs2 as a function of wavelength has been characterised using a representative selection of lines from the 9 and 10 μm bands of a single mode TEA CO2 laser. Results are shown to be in good agreement with theory in which wavelength dependent absorption, most significant for the generated signal, is taken into account.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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  • 2
    ISSN: 1432-0649
    Schlagwort(e): 42.60 ; 42.80
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The paper reports on the production of an optical time standard on the basis of the He−Ne laser stabilized to theE line in methane and on a comparison of its frequency stability with that of the rubidium standard. It is shown that the stability of the optical standard is better than that of the rubidium one. Frequency measurements of theE line gavev E=88373149031.2±1.2 kHz. We have also made new measurements on the frequency of the He−Ne laser stabilized to theF 2 (2) methane line: $$v_F = 88376181602.9 \pm 1.2kHz.$$
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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  • 3
    Digitale Medien
    Digitale Medien
    Springer
    Applied physics 36 (1985), S. 125-131 
    ISSN: 1432-0649
    Schlagwort(e): 42.80
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Reflectivity and phase-shift properties of a device composed of two flat mirrors with a gold coating 1 μm thick have been measured, at some relevant light incidence angles, for λ1=488nm and λ2=514.5nm. An experimental investigation of the low-frequency noise (around 50 mHz) contributed by the phase-shifter in an ellipsometer is described.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 4
    Digitale Medien
    Digitale Medien
    Springer
    Applied physics 36 (1985), S. 149-153 
    ISSN: 1432-0649
    Schlagwort(e): 42.55 ; 42.60 ; 42.80
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract We observed and compared the opto-voltaic signals in CO and CO2 lasers. The signals are obtained capacitively from the water cooling jacket as a low voltage source not influencing the current circuit. We observed from measurement that the output power and the so-called optovoltaic input power have a distinct relationship depending on laser current and cavity parameters. It will be shown that opto-voltaic detection is a very sensitive method especially for CO lasers.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 5
    Digitale Medien
    Digitale Medien
    Springer
    Applied physics 36 (1985), S. 155-161 
    ISSN: 1432-0649
    Schlagwort(e): 42.10 ; 42.80 ; 42.30
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract This paper reports on a method for measuring the velocity gradient using a laser Doppler phenomenon. The velocity gradient is determined from the velocity difference between two different points of the probing object and is actually obtained from the optical heterodyning of two differently Doppler-shifted scattered light fields from two points of the object having different velocities. The properties of output beat signals are theoretically investigated from their spectral broadening including the effect of the detecting aperture. The preliminary experiment was performed by using a rotating glass disk whose velocity is different from its center to the outside. The experimental results shows the usefulness of the present method for measurements of the velocity gradient.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 6
    Digitale Medien
    Digitale Medien
    Springer
    Applied physics 36 (1985), S. 33-40 
    ISSN: 1432-0649
    Schlagwort(e): 52 ; 42.80
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The increase of the interrupting capability of modern SF6 puffer breakers demands a better knowledge of the interaction of the arc with the gas flow. During the current interruption in an SF6 breaker the arc temperature in the stagnation zone is of decisive importance. The temporal evolution of the arc temperature and the diameter is studied by means of interferometry and emission spectroscopy. Experimental results are presented which show the influence of the current slope and the gas pressure on the arc decay. These results are compared with a theoretical model describing the temperature decay after current interruption.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 7
    Digitale Medien
    Digitale Medien
    Springer
    Applied physics 38 (1985), S. 199-203 
    ISSN: 1432-0649
    Schlagwort(e): 42.80 ; 35 ; 07
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract We describe an extremely sensitive method to investigate nonradiative processes following optical excitation. In a low-temperature calorimeter, the sample is irradiated with monochromatic light. The absorbed energy which is converted into phonons leads to a measurable increase of the sample temperature. The lowest detectable dissipated energy is 2·10−12J at a working temperature of 0.03 K. We demonstrate our method with a calorimetric absorption spectrum of J-aggregate monolayers of 1-methyl-1′-octadecyl-2,2′-cyanine. From this spectrum the emission quantum efficiency is obtained as a function of excitation wavelength. A relative minimum is found at the long wavelength edge of the absorption band at 582.5 nm.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 8
    Digitale Medien
    Digitale Medien
    Springer
    Applied physics 38 (1985), S. 143-146 
    ISSN: 1432-0649
    Schlagwort(e): 42.65 ; 42.80
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Application of gas-phase molecular substances in nonlinear optics appears very promising. The paper reports on the experimental two-photon-resonant four-wave frequency-mixing of Nd: YAG laser radiation inp-terphenyl (PTP) vapors. The nonlinear susceptibility calculated from the experimental data made χ(3)≃10−31 ESU. This value is commensurable with the quasiresonant susceptibility of alkali atoms and is considerably higher than the resonant susceptibilities of simple molecules such as NO and CO. The paper seems to be the first devoted to the nonlinear frequency-mixing in dye vapors.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 9
    Digitale Medien
    Digitale Medien
    Springer
    Applied physics 38 (1985), S. 71-78 
    ISSN: 1432-0649
    Schlagwort(e): 42.20 ; 42.30 ; 42.80
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The reduction mechanism of speckles appearing in laser-microscope images is studied theoretically and experimentally when an object is illuminated by laser light through a rotating multimode optical fiber. The principle of the speckle reduction is based on independent addition of microscope images with boiling-like speckles as a result of the rotational motion of the optical fiber used for illumination. Especially, the speckle reduction is evaluated from first-order statistics of the speckle intensity in which its saturation effect is taken into consideration.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 10
    Digitale Medien
    Digitale Medien
    Springer
    Applied physics 36 (1985), S. 53-54 
    ISSN: 1432-0649
    Schlagwort(e): 42.65 ; 42.80
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Generation of the second- and fourth-order harmonics of laser radiation is reported in Mg vapor at the forbidden 3s 21 S o–4s 1 S o transition. The conversion efficiency for the second-order harmonics has been measured to be ∼ 10−2% and for the fourth one ∼ 10−8%.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
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