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  • Artikel  (21)
  • 42.65  (21)
  • Springer  (21)
  • Cambridge University Press
  • Wiley
  • 1980-1984  (21)
  • 1975-1979
  • 1984  (21)
  • Physik  (21)
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  • Artikel  (21)
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  • Springer  (21)
  • Cambridge University Press
  • Wiley
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  • 1980-1984  (21)
  • 1975-1979
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  • 1
    Digitale Medien
    Digitale Medien
    Analysis of temporal pulse development in passively mode-locked lasers (1984)
    Springer
    Applied physics 34 (1984), S. 123-128 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.55R ; 42.60D ; 42.65
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Pulse-shortening and pulse broadening effects in passively mode-locked lasers are analysed. A steady-state pulse duration limit is calculated and compared with round-trip simulations. The numerical calculations apply to a picosecond Nd: glass laser. Methods of short-pulse generation are discussed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00697504
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  • 2
    Digitale Medien
    Digitale Medien
    Ninth-order nonlinear polarization and vuv generation in Hg vapor (1984)
    Springer
    Applied physics 34 (1984), S. 171-173 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.65 ; 42.80
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Interference of resonant ninth-order and nonresonant seventh-order nonlinear polarizations in Hg atoms has been studied, and direct conversion of fundamental ir radiation into the vuv has been obtained. The interference has been observed in the form of a Fano-Boitler contour. The efficiency of generation by ninth-order processes appears to be higher than that by seventh-order.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00697511
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  • 3
    Digitale Medien
    Digitale Medien
    Bistability and passive Q-switching of a CO2 laser with saturable absorber (1984)
    Springer
    Applied physics 35 (1984), S. 77-82 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.55 ; 42.65
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The coexistence of bistability and repetitive passive Q-switching of a CO2 laser with a gaseous saturable absorber has been investigated experimentally. With CH3F as the saturable absorber bistability has been observed simultaneously with passive Q-switching, whereas with CH3OH either one of these phenomena can only exist, as demonstrated for the first time. The measured features of both systems can be explained qualitatively by rate-equation theory.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00697426
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  • 4
    Digitale Medien
    Digitale Medien
    Saturation of resonant frequency conversion processes in cadmium vapour (1984)
    Springer
    Applied physics 33 (1984), S. 225-234 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.65
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract We have investigated two-photon resonant up conversion of 375 to 159 nm coherent radiation using the four-frequency process ω159=2ω375+ω1040 in cadmium vapour, where the ir component (1040 nm) is internally generated by the 375 nm pump tuned to the Cd two-photon transition 5s 2 1 S 0→5s6s 1 S 0. Scaling laws and tuning behaviour of both the 159 and 1040 nm output power were measured up to 1×108 W cm−2 pump intensity and 2×1017 cm−3 Cd number density. The results are compared to numerical calculations based on semiclassical theory in a stationary perturbation approximation up to third order. Here, in accordance with experimental results, the ir component was assumed to originate from a superposition of stimulated emission and parametric generation. The observed saturation effects turned out to be mainly due to population changes of the atomic levels involved and are qualitatively reproduced by calculations. Discrepancies with respect to absolute output levels are discussed in terms of the approximations in the theoretical formalism.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00697332
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  • 5
    Digitale Medien
    Digitale Medien
    Off-resonant excitation of molecular vibrations in liquids, investigated by picosecond probe scattering (1984)
    Springer
    Applied physics 34 (1984), S. 23-28 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 35.80 ; 42.65 ; 78.30
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The coherent excitation of molecular vibrations in liquids via off-resonant stimulated Raman amplification is shown to consist of two parts with vastily different spectral and temporal properties. One component situated at the frequency differenceω L −eω S of the driving fields follows almost instantaneously the system response function. The second part at the eigenfrequency eω 0 carries information on the vibrational dephasing. Detecting both frequency components simultaneously by coherent anti-Stokes probe scattering a novel 2-channel method is demonstrated. The vibrational dephasing time of thev 3-mode of CH3I is directly measured to beT 2=2.6±0.15 ps. This result gives experimental support to the deconvolution techniques required in conventional spectroscopy.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00697460
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  • 6
    Digitale Medien
    Digitale Medien
    Interferometric enhancement of surface-generated second-harmonic radiation (1984)
    Springer
    Applied physics 34 (1984), S. 69-72 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.65
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Greatly improved second-harmonic emission has been obtained from dye monolayers adsorbed at quartz etalons. Two different types of interferometers have been studied in terms of the SH signal from dye coverage versus harmonic background emission. The phasematching-like conditions for constructive interferometric enhancement and the concomitant spatial and spectral emission characteristics are discussed in detail.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00697950
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  • 7
    Digitale Medien
    Digitale Medien
    Collimation of atomic beams by resonant laser radiation pressure (1984)
    Springer
    Applied physics 35 (1984), S. 149-153 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.65 ; k
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The application of the resonant light pressure created by an axially symmetrical light field for collimating atomic beams has been considered. As an example, consideration is given to the possibility of collimating an atomic beam by the light field produced by the reflection of a plane wave from the internal surface of a metal cone. It has been shown that the radiation pressure can reduce the atomic-beam transverse velocities to the value of the order of 100 cm/s which corresponds to effective temperature of about 10−3 K. A method for producing collimated beams of cold atoms based on simultaneous deceleration and collimation of atomic beams by resonant laser radiation pressure is proposed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00697705
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  • 8
    Digitale Medien
    Digitale Medien
    Influence of dephasing relaxation on the transient properties of parametric four-wave mixing (1984)
    Springer
    Applied physics 34 (1984), S. 55-61 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.65
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Transient parametric scattering is investigated theoretically using density matrix perturbation theory. Emphasis is placed on the effects of population and transverse or dephasing relaxation on the scattered parametric pulse durations. Pulse duration measurement provides important insight into the actual transient temporal behavior of four-wave mixing processes and is shown to be a potentially useful technique for the characterization of material time constants and incident pulse shape.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00697948
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  • 9
    Digitale Medien
    Digitale Medien
    Numerical study of energy transfer between a beam and its internal reflection component in a nonlinear medium (1984)
    Springer
    Applied physics 33 (1984), S. 51-56 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.65 ; 78.20 ; 42.40
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract A theoretical study is presented of a special case of stationary energy transfer in degenerate two-wave mixing in a reflection geometry. The two interacting beams consist of a beam and its first-order internal reflection component created at the boundary of a nonlinear medium. Numerical results obtained from the computer calculations are presented as graphs. It is found that, under suitable conditions, this phenomenon can be used to eliminate the multiple internal reflections.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00690025
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  • 10
    Digitale Medien
    Digitale Medien
    Anti-Stokes Raman laser investigations on atomic Tl and Sn (1984)
    Springer
    Applied physics 33 (1984), S. 133-139 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 33.80 ; 42.65
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Anti-Stokes Raman laser experiments using metastable atomic Tl and Sn have been performed. The required metastable population inversion is generated by photodissociation of TlI and SnBr2 with KrF laser radiation. The Tl(Sn) system permits frequency up-conversion by 7793 cm−1 (17,163 cm−1). By optimization of system parameters, uv output energies up to 2.5 mJ (377 nm) and conversion efficiencies of more than 25% have been achieved for Tl. Further improvements and principal limitations will be discussed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00688519
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  • 11
    Digitale Medien
    Digitale Medien
    Optical four-wave mixing in epitaxial narrow-gap semiconductor films (1984)
    Springer
    Applied physics 34 (1984), S. 107-122 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.65 ; 71.20
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract A short review on the theoretical description of nonlinear optical phenomena which are caused by an electric polarization cubic in the electric field amplitudes is given. Then the microscopic theories for the calculation of the nonlinear susceptibility, especially in semiconductors, are briefly reported. After a short section on the bandstructure of IV–VI compounds in a magnetic field, the lineshapes of the coherent anti-Stokes radiation as a function of the magnetic field are discussed in detail. In the experimental part measurements of coherent anti-Stokes Raman scattering (CARS) in PbTe and PbSe epitaxial films are reported. We observed pure as well as combined spin flip transitions. These data and the results of additionally observed interbandtransitions were used in least squares fits and consistent sets of bandparameters of PbTe and PbSe were obtained.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00697503
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  • 12
    Digitale Medien
    Digitale Medien
    Chaotic behavior of a hybrid optical bistable system without a time delay (1984)
    Springer
    Applied physics 35 (1984), S. 59-64 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.65
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The observation of chaos in a hybrid optical bistable device is reported. There is no delay line in this system. An investigation of the mechanism concentrates on a somewhat simplified structure. This structure is described by a third-order differential equation with quadratic nonlinearity. Its realization as an electronic circuit is studied in detail. As we observe patterns of universal behaviour, we also comment on the relation to iterative maps.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00697423
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  • 13
    Digitale Medien
    Digitale Medien
    On the aproximate formulae and the exact method to compute wavefront reflectivity in degenerate four-wave mixing (1984)
    Springer
    Applied physics 33 (1984), S. 161-165 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.65 ; 78.20
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Wavefront reflectivity in a conventional degenerate four-wave mixing (FWM) configuration can be calculated, using either approximate formulae, or exact numerical methods to solve the nonlinear coupled-wave equations. We have computed the wavefront reflectivity for FWM in a transmission and reflection geometry, respectively, using these two different methods. A comparison between them indicates that these formulae are reasonable approximations when beam coupling, diffraction efficiency and absorption are all low, and especially in the case of transmission geometry.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00688523
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  • 14
    Digitale Medien
    Digitale Medien
    Anisotropic selfdiffraction in BaTiO3 (1984)
    Springer
    Applied physics 35 (1984), S. 17-21 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.70 ; 42.65 ; 42.80
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Anisotropic selfdiffraction in BaTiO3 crystals utilizing the large electrooptic coefficientr 42 is described. In the absence of an external electric field the generated space charge field is determined by diffusion processes. The theory is in agreement with the experimental results. The angles between extraordinary and ordinary beams, the intensity and time dependence of transmitted and diffracted beams, and phase conjugation effects are measured and evaluated.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00697516
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  • 15
    Digitale Medien
    Digitale Medien
    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
    Schlagwort(e): 42.60 ; 42.65
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: 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.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00688522
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  • 16
    Digitale Medien
    Digitale Medien
    On the multiple-root problem when solving directly the nonlinear coupled-wave equations for two-wave mixing in a reflection geometry (1984)
    Springer
    Applied physics 35 (1984), S. 141-144 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.65 ; 78.20 ; 42.40
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract A detailed analysis is given of the properties of the algebraic equations obtained when solving directly the nonlinear coupled-wave equations for degenerate two-wave mixing in a reflection geometry. An efficient method is developed for computing the appropriate root only amongst the multiple roots of these algebraic equations.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00697703
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  • 17
    Digitale Medien
    Digitale Medien
    Using the seventh-order numerical method to solve first-order nonlinear coupled-wave equations for degenerate two-wave and four-wave mixing (1984)
    Springer
    Applied physics 35 (1984), S. 217-225 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.65 ; 78.20
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Using a new seventh-order numerical method [theO(h 7) method] for solving two-point boundary value problems, numerical solutions of the first-order nonlinear coupledwave equations for degenerate two-wave and four-wave mixing in a reflection geometry have been obtained. A computer program employing the Gauss-Jordan elimination technique has also been adopted to effectively solve the resultant large, sparse and unsymmetric matrix, obtained from theO(h 7) method and the Newton-Raphson iteration method. Numerical results from the computer calculations are presented graphically. A comparison between thisO(h 7) method and the shooting method, mainly from the viewpoint of computational efficiency, is also made.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00693930
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  • 18
    Digitale Medien
    Digitale Medien
    Continuous-wave frequency mixing and UV generation in sodium vapor (1984)
    Springer
    Applied physics 35 (1984), S. 249-252 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.65
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Resonant nonlinear four-wave mixing processes have been studied in sodium vapor. The generation of cw uv radiation and the upconversion of λ=10.8 μm light is reported. The coefficientC=P 4/P1P2P3 obtained was on the order of ∼10−2 W−2, the pump spectral width being 12GHz. Resonant atomic nonlinearities are shown to be used for effective cw frequency conversion.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00693935
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  • 19
    Digitale Medien
    Digitale Medien
    Laser irradiation of a three-level gas system: Continued-fraction theory and applications (1984)
    Springer
    Applied physics 34 (1984), S. 73-82 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.65 ; 32 ; 33
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The general steady-state solution of the density matrix equations for a Doppler broadened three-level system irradiated by two resonant standing-wave laser beams of arbritrary intensity is analyzed. The solution is expressed in a matrix continued fraction form, that involves 4×4 matrices in important configurations and is convenient for numerical computations. Some representative cases including the absorption spectra for a probe laser of arbitrary intensity, the Doppler-free multiphoton resonances and the optically pumped lasers are analyzed numerically in connection with previous experimental investigations.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00697951
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  • 20
    Digitale Medien
    Digitale Medien
    Influence of the optical activity on hologram formation in photorefractive crystals (1984)
    Springer
    Applied physics 33 (1984), S. 227-230 
    Details
    ISSN: 1432-0630
    Schlagwort(e): 42.40 ; 42.65
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau , Physik
    Notizen: Abstract It is shown that dynamical hologram formation in photorefractive, optically active crystals is accompanied by polarization and energy exchange. These effects may be used like new effective holographic methods for determinations of crystal parameters and optical signal processing in real time. In self-diffraction a polarization rotation the order of degrees/cm for Bi12TiO20 and Bi12SiO20 is predicted.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00614662
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  • 21
    Digitale Medien
    Digitale Medien
    Harmonic mixing in a cosine potential for arbitrary damping (1984)
    Springer
    Applied physics 33 (1984), S. 1-7 
    Details
    ISSN: 1432-0630
    Schlagwort(e): 72.20 ; 42.65
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau , Physik
    Notizen: Abstract Harmonic mixing of two alternating electric fields due to a Brownian charged particle in a nonlinear one-dimensional potential of cosine shape is investigated. The dynamics of the system are described by a time dependent Fokker-Planck equation. The appropriate distribution function is obtained by a matrix continued fraction expansion method, which is treated numerically. The dc signal due to mixing is computed for strong thermal fluctuations in all relevant parameter ranges of the pinning potential strength, damping and frequency. The dc signal without fluctuations is discussed separately. Resonance effects are shown in the electric dc field and the additional phase shift, caused by intrinsic relaxation processes.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01197078
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