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  • 1
    Electronic Resource
    Electronic Resource
    Chaotic laser dynamics (1988)
    Springer
    Optical and quantum electronics 20 (1988), S. 1-22 
    Details
    ISSN: 1572-817X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Notes: Abstract Chaotic emission of lasers theoretically predicted long ago has only recently been experimentally verified. A review of experiments on various laser types is given.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02069690
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Collision broadening of the 3.39 μm methane line (1974)
    Springer
    The European physical journal 271 (1974), S. 311-316 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Collision broadening of the 3.39 μm methane line is investigated experimentally using saturated absorption spectroscopy and theoretically by numerical integration of the quantum mechanical equations of motion for a single molecule moving in a standing wave field. The line profiles are calculated on the basis of a simple collision model. It is shown that the line widths are in general smaller than the relaxation rate and the line profiles are not Lorentzian. Self broadening as well as broadening by H2, Ar, Xe is treated. The elastic scattering cross sections which the calculated line profiles contain as free parameters are determined by comparison with measured line widths.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01677941
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Simple frequency measurement chain to 30 THz (1990)
    Springer
    Applied physics 50 (1990), S. 381-383 
    Details
    ISSN: 1432-0649
    Keywords: 06.20 ; 07.62
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We report harmonic mixing experiments between a 72 GHz mm-wave and 3.7 THz NH3-laser radiation, as well as between 3.7 THz and the 10 μm R(30) CO2-laser line. For the former mixing a semiconductor diode is used, while for the higher frequencies an MIM tunnel diode served as the nonlinear element. Beat signals are of sufficient signal to noise ratio for precise optical frequency measurement.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00325090
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Frequency measurement chain to 30 THz using FIR schottky diodes and a submillimeter backward wave oscillator (1984)
    Springer
    Applied physics 34 (1984), S. 63-67 
    Details
    ISSN: 1432-0649
    Keywords: 06 ; 07.60 ; 42.60
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract An infrared frequency measurement chain is reported, the simplicity of which allows phase-coherent frequency measurements up to 30 THz. Frequency measurement is demonstrated on the 10P(28) line of the Lamb-dip stabilized13CO2-laser.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00697949
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Self pulsing properties of optically pumped FIR NH3 lasers (1987)
    Springer
    Applied physics 43 (1987), S. 179-182 
    Details
    ISSN: 1432-0649
    Keywords: 42.50.Tj ; 42.55.-f
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We report on measurements of periodic and chaotic self-pulsing beyond the second threshold of far-infrared NH3 lasers. While the instabilities of the 81 μm14NH3 laser follow a simple pattern, for the 374 μm15NH3 laser different pulsing properties are found in different parameter ranges. Pulses under conditions of high pumping power are measured in detail, in view of possible applications of these coherent, high-repetition rate far-infrared pulsed lasers.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00695620
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Phase dynamics of a detuned single-mode laser (1992)
    Springer
    Applied physics 55 (1992), S. 104-108 
    Details
    ISSN: 1432-0649
    Keywords: 42.50.Lc ; 05.45.+b
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We report measurements on the phase dynamics of a detuned single mode laser which has in the past shown correspondence to the complex Lorenz equation. The corresponding ranges of periodic pulsing, of detuned chaos and of windows within the chaotic domain are investigated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00324058
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    A multiple-pass interferometer for electron and atom density measurements in shock tube plasmas (1975)
    Springer
    Applied physics 7 (1975), S. 203-207 
    Details
    ISSN: 1432-0630
    Keywords: Shock tubes ; Electron-density ; Atom-density ; Electron-temperature measurements ; Optical Interferometry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract An eleven-pass, two-wavelength interferometer for density measurements within the ionisation relaxation region of rare-gas shock waves has been developed. The minimum detectable electron density is 1·1014 cm−3. A method to calculate the electron temperature profile across the relaxation region from the measured density profiles is described.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00936025
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    Paper (German National Licenses)
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  • 8
    Electronic Resource
    Electronic Resource
    Vibrational relaxation in the HCOOH-far-infrared laser (1976)
    Springer
    Applied physics 9 (1976), S. 175-177 
    Details
    ISSN: 1432-0630
    Keywords: Far-infrared lasers ; Vibrational relaxation ; Saturated absorption
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract Saturated absorption of CO2-laser radiation in HCOOH gas was measured as a function of pressure. A simple rate equation model is used to calculate the saturation photon densities. It is concluded from these data that vibrational relaxation is collision predominant, and that decreased absorption, observed at high pressure and high radiation intensities, cannot be interpreted as diffusion bounded vibrational relaxation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00903956
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    Paper (German National Licenses)
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  • 9
    Electronic Resource
    Electronic Resource
    High-order harmonic mixing with Schottky diodes in the FIR region (1984)
    Springer
    Applied physics 35 (1984), S. 199-200 
    Details
    ISSN: 1432-0649
    Keywords: 42.60 ; 07.60
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We report results of harmonic mixing experiments between millimetric oscillators and FIR laser radiations up to 3 THz, using micrometer-size Schottky-barrier diodes. Signal-to-noise ratios suitable for precise frequency counting have been obtained for harmonic numbers up to 40.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00693927
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    Paper (German National Licenses)
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  • 10
    Electronic Resource
    Electronic Resource
    Models, predictions, and experimental measurements of far-infrared NH3-laser dynamics and comparisons with the Lorenz-Haken model (1995)
    Springer
    Applied physics 61 (1995), S. 223-242 
    Details
    ISSN: 1432-0649
    Keywords: 42.60.Mi ; 05.45.tb
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Dynamics of the intensity and optical field amplitude of a coherently pumped far-infrared NH3-laser are measured and characterized. The experimental findings in certain parameter ranges closely follow the dynamics of the Lorenz model and its generalization for laser systems. Similarities and some specific differences are found in geometrical or statistical characterizations of the attractors. The experimental results are also consistent with the results of a model of optically pumped three-level lasers which takes into account the presence of a multiplicity of velocity groups as well as three-level coherence effects. For a certain region in parameter space, this far more complex model with a much larger phase space produces results similar to the dynamics of the Lorenz model. The model also provides explanations of differences between the experimental results and results from the Lorenz model.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01082041
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