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  • Artikel  (64)
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  • Springer  (64)
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  • 1
    Digitale Medien
    Digitale Medien
    Excimer ArF/XeF lasers providing high-power stimulated radiation in Ar/Xe and F lines (1977)
    Springer
    Applied physics 14 (1977), S. 231-233 
    Details
    ISSN: 1432-0630
    Schlagwort(e): 42.55
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau , Physik
    Notizen: Abstract Lasing in atomic lines of noble gases and fluorine, prior to excimer radiation, was observed in an electric discharge ArF/XeF excimer laser. Some Ar/Xe lines end at metastable levels, which are very important for the formation of ArF/XeF excimer molecules. Five new lasing lines of atomic fluorine have been obtained. Consideration is given to the use of lasing in atomic and molecular lines, that occurs in one burst, in investigations of the excitation kinetics of excimer states under the conditions of a high-pressure electric discharge.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00883096
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  • 2
    Digitale Medien
    Digitale Medien
    Properties and current-voltage characteristics of discharges in waveguide gas lasers (1977)
    Springer
    Applied physics 14 (1977), S. 277-282 
    Details
    ISSN: 1432-0630
    Schlagwort(e): 42.55 ; 52
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau , Physik
    Notizen: Abstract The paper deals with the properties andI-V characteristics of discharges in narrow capillaries used, for example, for He−Ne waveguide lasers. It has been observed that discharges in He−Ne waveguide lasers are unstable because of the strongly falling characteristic. A theory is presented which assumes that at low currents wall charges restrict the positive column to a narrow plasma channel and are the main reason for the observed falling characteristic. A numerical evaluation for helium gives results which agree well with experimental data.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00882732
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  • 3
    Digitale Medien
    Digitale Medien
    Models of DNA-dye-complexes: Energy transfer and molecular structures as evaluated by laser excitation (1979)
    Springer
    Applied physics 18 (1979), S. 333-338 
    Details
    ISSN: 1432-0630
    Schlagwort(e): 87 ; 42.55
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau , Physik
    Notizen: Abstract Energy transfer in DNA-dye-complexes after excitation in the UV down to 220 nm by means of a tunable laser was investigated. DNA of different base composition and polynucleotides were compared. The dyes proflavine, acridine orange and ethidium bromide were used. The energy transfer from DNA-bases to dye molecules was measured in dependence of the excitation wavelength and the base composition of the DNA. Models of the energy transfer from DNA to dye and of the molecular structures of the DNA-dye-complex (intercalation) could be deduced.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00899685
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  • 4
    Digitale Medien
    Digitale Medien
    Free-electron lasers and masers on curved paths (1979)
    Springer
    Applied physics 19 (1979), S. 47-51 
    Details
    ISSN: 1432-0630
    Schlagwort(e): 42.55 ; 42.80
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau , Physik
    Notizen: Abstract The possibility of building free-electron lasers and masers with quasi-circular undulators is considered. The two-mirror cavity is replaced by a suitable waveguide. The magnetic field along the orbit has a continuous component superimposed on the alternating one. Besides allowing large freedom for electron guiding and focusing, the structure allows effective negative mass conditions, which may enhance the electron beam modulation when space charge effect are important. Furthermore the radiation frequency can be higher than that in a linear undulator with the same electron energy, and long interaction times are possible in a compact structure.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00900537
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  • 5
    Digitale Medien
    Digitale Medien
    Laser properties of praseodymium pentaphosphate single crystals (1979)
    Springer
    Applied physics 19 (1979), S. 345-351 
    Details
    ISSN: 1432-0630
    Schlagwort(e): 78.55 ; 42.55
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau , Physik
    Notizen: Abstract PrP5O14, PrxLa1−xP5O14, and PrxY1−xP5O14 (0≦x≦1) single crystals of laser quality were synthesized and their crystallographic and optical parameters measured. Laser emissions in the visible (λ=637.4 nm) with no mirrors in place (superradiance) and also in various optical resonators have been observed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00900479
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  • 6
    Digitale Medien
    Digitale Medien
    Continuous laser oscillation in diatomic molecular sodium (1977)
    Springer
    Applied physics 13 (1977), S. 97-99 
    Details
    ISSN: 1432-0630
    Schlagwort(e): 42.55 ; 82.50
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau , Physik
    Notizen: Abstract First cw laser oscillation with thresholds below 1 mW was observed for various B1Пu → X1 ∑ g + transitions of diatomic molecular sodium excited by different argon laser lines in the range of 454–488 nm. For pump powers of 0.5 W output powers up to 3 mW and single-pass gain up to 0.1 cm−1 were obtained. Some properties of the heat pipe laser system are discussed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00890727
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  • 7
    Digitale Medien
    Digitale Medien
    Optically pumped FIR-laser with variable Fabry-Perot output coupler (1977)
    Springer
    Applied physics 13 (1977), S. 383-385 
    Details
    ISSN: 1432-0630
    Schlagwort(e): 42.55 ; 42.80
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau , Physik
    Notizen: Abstract An optically pumped FIR laser was operated with a copper mesh Fabr-Perot output coupler. With this device a Gaussian output beam was obtained andthe degree of coupling could be varied continuously, thus allowing optimum coupling. From the measured properties of the wire mesches grains of two FIR laser lines are calculated and the saturation intensities estimated.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00882614
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  • 8
    Digitale Medien
    Digitale Medien
    A magnetic tuning system for dye lasers (1977)
    Springer
    Applied physics 14 (1977), S. 25-28 
    Details
    ISSN: 1432-0630
    Schlagwort(e): 42.55 ; 42.80
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau , Physik
    Notizen: Abstract A new device for magnetically displacing the output mirror of a laser resonator and synchronously tilting an etalon in order to obtain single-mode tuning of a dye laser over a tuning range of at least 10 GHz is described. Comparatively large displacements with good linearity of a coil mounted on a membrane and placed inside the strong magnetic field of a ring magnet are obtained for currents in the order of several hundred milliamperes. Together with etalon flats of appropriate thickness and reflection mounted in the resonator of the laser a versatile instrument for application in intra and extra cavity spectroscopy has been developed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00882629
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  • 9
    Digitale Medien
    Digitale Medien
    Measurements of some reaction rates of importance in KrF lasers (1977)
    Springer
    Applied physics 14 (1977), S. 393-398 
    Details
    ISSN: 1432-0630
    Schlagwort(e): 34 ; 42.55
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau , Physik
    Notizen: Abstract A flowing afterglow method has been used to study a number of reactions of importance in KrF lasers using NF3 as the fluorine donor. Total rate constants are reported for Kr*(3 P 2)+NF3 and Kr++NF3. The thermal energy attachment coefficient has been measured for NF3 and the cross section for the electron excitation process Kr*(3 P 2) +e→Kr*(3 P 1)+e has been estimated. The relevance of these results to discharge pumped KrF lasers is discussed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00883445
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  • 10
    Digitale Medien
    Digitale Medien
    Argon laser with wall stabilized transverse discharge (1977)
    Springer
    Applied physics 14 (1977), S. 193-197 
    Details
    ISSN: 1432-0630
    Schlagwort(e): 42.55 ; 52
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau , Physik
    Notizen: Abstract Planar and cylindrical discharges for argon lasers are compared by plasmatheoretical calculations. The maximum laser output power available in the two arrangements is computed in dependence of various parameters neglecting saturation mechanisms. A transverse discharge arrangement confining the positive column by two parallel walls is described and experimental laser threshold values for the current and pressure are reported.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00883089
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