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  • Artikel  (30)
  • 61.70  (18)
  • 33
  • Springer  (30)
  • American Chemical Society (ACS)
  • American Geophysical Union
  • International Union of Crystallography
  • National Academy of Sciences
  • 2015-2019
  • 2005-2009
  • 1990-1994  (8)
  • 1980-1984  (22)
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  • 1983  (22)
  • Physik  (30)
  • Philosophie
  • Werkstoffwissenschaften, Fertigungsverfahren, Fertigung
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  • Artikel  (30)
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  • Springer  (30)
  • American Chemical Society (ACS)
  • American Geophysical Union
  • International Union of Crystallography
  • National Academy of Sciences
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  • 2015-2019
  • 2005-2009
  • 1990-1994  (8)
  • 1980-1984  (22)
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  • Physik  (30)
  • Philosophie
  • Werkstoffwissenschaften, Fertigungsverfahren, Fertigung
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  • 1
    Digitale Medien
    Digitale Medien
    New FIR laser lines from optically pumped DCOF (1983)
    Springer
    Applied physics 30 (1983), S. 1-4 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 33 ; 42.55
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Twenty FIR laser lines with wavelengths between 146 and 2000 μm have been observed from deuterated formyl fluoride (DCOF) optically pumped with isotopic CO2 lasers. Tunable diode laser measurements on thev 4 band of DCOF were combined with earlier high precision spectroscopic data on thev 3 andv 4 bands, and enabled identification of the transitions responsible for 9 of the new FIR lines.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00692650
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  • 2
    Digitale Medien
    Digitale Medien
    Energy efficiency in the multi-stage laser separation of13C by an elimination method (1983)
    Springer
    Applied physics 30 (1983), S. 143-148 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 33
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Energy efficiency has been discussed in the multi-stage laser separation of13C in the ir laser photolysis of CF3I. The comparison has been made between the two methods, i.e., the photolysis of13C molecules (ordinary method) and the photolysis of12C molecules (elimination method). The former recycles the photolyzed product after the regeneration of feed molecules, while the latter recycles the residue after the elimination of the photolyzed product. The analysis of the energy consumption using theoretical models has shown that the elimination method consumes more energy, but the difference is far less than expected; the overall energy consumption may reach the same level at a lower pressure according to our estimation which includes the factors of the quantum efficiency for the dissociation, the energy difference between the laser lines and the material loss for the regeneration. It may imply that the elimination method is more favored in a practical application because it is free from the regeneration procedure.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00695469
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  • 3
    Digitale Medien
    Digitale Medien
    The effect of added nitrogen on multiphoton absorption by ammonia (1983)
    Springer
    Applied physics 32 (1983), S. 75-78 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 33 ; 34 ; 42.55
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Multiphoton absorption (MPA) of the CO2 laser 9 μmR(30) line (pulse width 60 ns, FWHM) by NH3 and NH3/N2 mixtures was studied as a function of gas composition, pressure and laser fluence (Φ). MPA occurs for Φ smaller than those that have been used for optically pumped NH3/N2 lasers; consequently a simple two-level absorption model will not adequately describe laser action in these systems. The photon energy deposited in NH3/N2 mixtures can be calculated from the MPA cross-section and the fluence dependence of the illumination geometry. An examination of the efficiency of conversion of this absorbed energy to the reported radiant energy of optically pumped NH3/N2 lasers shows an optimum value which depends on pressure, and gas composition.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00688546
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  • 4
    Digitale Medien
    Digitale Medien
    The vibrational relaxation time constant for theB v=0 level of XeCl (1983)
    Springer
    Applied physics 32 (1983), S. 193-198 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.55 ; 33 ; 82.50
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The vibrational relaxation time constant for theB v=0 vibrational level of XeCl* has been investigated by observing the coupling between theB v=1 andB v=0 vibrational levels under saturated lasing conditions. Based on this observation, estimates of the expected extraction efficiency from theB-state have been made.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00688287
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  • 5
    Digitale Medien
    Digitale Medien
    Dressed-atom approach for probe spectroscopy in Doppler-broadened three-level systems with standing-wave saturator (1983)
    Springer
    Applied physics 31 (1983), S. 115-129 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.50 ; 42.65 ; 33
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The three-level probe spectroscopy of Doppler-broadened transitions in the presence of a standing wave pump laser is investigated through a diagrammatic method. A probe-response diagram is defined where the resonance positions versus the probe laser frequency and absorber velocity are plotted. The dressed atom description provides a convenient method for deriving the probe response diagram and calculating the position of the Doppler-free structures on the absorption spectrum, including the ac Stark shifts. We have interpreted probe spectra on the basis of the probe response diagram, presenting new features and giving a detailed physical interpretation of all the coherent effects appearing in the spectra. Population effects are not included in the dressed system analysis and are calculated on the basis of a semiclassical treatment, but the probe response diagram provides a complete interpretation of the involved phenomena.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00702607
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  • 6
    Digitale Medien
    Digitale Medien
    Multistep ionization of CS2 vapour (1983)
    Springer
    Applied physics 31 (1983), S. 153-155 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 33 ; 42.65
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract We report on the multistep ionization process observed in CS2 vapour irradiated by 337 nm nitrogen laser light. We propose and discuss a model in which optical as well as collisional excitation are involved in the ionization process.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00688836
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  • 7
    Digitale Medien
    Digitale Medien
    A broadband mid-infrared laser magnetic resonance spectrometer for the spectral range of 1200–2000 wavenumbers (1983)
    Springer
    Applied physics 31 (1983), S. 139-144 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 33 ; 55
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract A broadband mid-infrared laser magnetic resonance spectrometer is described, which can be operated in intracavity or extracavity configuration. The specially designed CO-laser gain tube allows operation from 1220–2000 cm−1. Experimental details and examples of spectroscopic applications are discussed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00688834
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  • 8
    Digitale Medien
    Digitale Medien
    Strong dependence of ir multiphoton absorption and dissociation yield of SF6 molecule on intensity (duration) of exciting laser pulse (1983)
    Springer
    Applied physics 30 (1983), S. 207-210 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 33 ; 82.50
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The role of played by the intensity of the exciting TEA CO2 laser pulses in the processes of ir multiphoton absorption (MPA) of SF6 molecules cooled toT R≃40 K andT v≃160 K in a pulsed supersonic jet and the dissociation of SF6 in a bulk atT≃300 K under essentially collisionless conditions have been investigated. A strong dependence of MPA and the dissociation yield on pulse intensity were observed. The frequency dependences of the intensity effects were studied.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00688408
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  • 9
    Digitale Medien
    Digitale Medien
    Sensitive amplitude-and phase-modulated absorption-spectroscopy with a continuously tunable diode laser (1994)
    Springer
    Applied physics 58 (1994), S. 137-142 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 07.65 ; 33 ; 42.80
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The output beam of a continuously tunable GaA1As-diode laser with external cavity is phase-modulated at 800 MHz in an electrooptic LiTaO3 crystal. The amplitude of the rf voltage applied to the EOM is modulated at 80 kHz in order to allow lock-in detection. Using a multipass absorption cell the detection limit of the absorption coefficient α could be pushed down to αmin ≧2 × 10−10 cm2212;1. The sensitivity of the techique is demonstrated by examples of overtone transitions in C2H2 and H2O vapor.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01082348
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  • 10
    Digitale Medien
    Digitale Medien
    Dye stability under excimer-laser pumping (1983)
    Springer
    Applied physics 30 (1983), S. 109-116 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 33 ; 42.55
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The stability of polymethine dyes under XeCl laser excitation has been investigated. (For these dyes emitting in the ir the difference between absorbed and emitted photoenergy is 2 eV.) The stability was measured in an amplifier device operating in the saturated regime. While the influence on dye concentration is negligible, the fluence dependence shows the importance of two photon absorptions. A meausure for the stability is the number of photons which can be emitted per dye molecule before the dye solution has degraded to 50% of the initial value. This value is in the range of 150–280. The stability is clearly related to the formation of photoproducts absorbing at the pump and the laser wavelength. A model starting from the change in the dye solution absorption spectra is in very good agreement with the observed energy decays.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00695464
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