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  • Articles  (109)
  • 42.65  (109)
  • Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics  (109)
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  • Articles  (109)
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  • Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics  (109)
  • Physics  (391)
  • 1
    Electronic Resource
    Electronic Resource
    Excitation of multilevel molecular systems by laser ir field (1978)
    Springer
    Applied physics 16 (1978), S. 47-57 
    Details
    ISSN: 1432-0630
    Keywords: 32 ; 42.65
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract Analytical results have been obtained for some aspects of polyatomic molecular interaction with resonant ir laser radiation. The following effects are investigated by use of Schrödinger's equation solution for natural multilevel models: the role of dynamic Stark effect in the transient region from molecular low levels to the quasi-continuum of highly excited vibrational levels; broadening of multiphoton transitions because of relatively fast decay into the quasi-continuum; threshold excitation property of multilevel systems with random detunings. Possible applications to constructing models for numerical calculations dealing with the molecule excitation problem are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00931421
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  • 2
    Electronic Resource
    Electronic Resource
    Tertiary amines as possible tunable laser materials in the ultraviolet (1979)
    Springer
    Applied physics 20 (1979), S. 291-294 
    Details
    ISSN: 1432-0630
    Keywords: 42.65 ; 82.50
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract Two photon excitation by a tunable dye laser is used to determine the decay kinetics of some aliphatic tertiary amines. The feasibility of obtaining laser action from trimethylamine and triethylamine by KrF laser pumping is quantitatively discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00894998
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  • 3
    Electronic Resource
    Electronic Resource
    Doppler-free polarization spectroscopy using linear polarized light (1978)
    Springer
    Applied physics 17 (1978), S. 151-154 
    Details
    ISSN: 1432-0630
    Keywords: 33 ; 42.65
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract Lines of theQ-branch of vibrational rotational spectra are distinguished fromP(R)-lines by light induced anisotropy in absorbing gases. We report, for the first time, on experiments using a linearly polarized saturation beam. A CO2-laser was employed to investigate the molecule SF6.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00885247
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  • 4
    Electronic Resource
    Electronic Resource
    Saturation-dips in the weak calcium intercombination line (1978)
    Springer
    Applied physics 17 (1978), S. 199-201 
    Details
    ISSN: 1432-0630
    Keywords: 32 ; 42.65
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract Lamb-dips have been observed in the weak calcium intercombination line by monitoring resonance fluorescence in an atomic beam excited by light of a stabilized cw dye laser inside or outside the laser cavity. A highly sensitive detection scheme is described.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00885256
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  • 5
    Electronic Resource
    Electronic Resource
    Generation of tunable picosecond light pulses covering the frequency range between 2700 and 32,000 cm−1 (1980)
    Springer
    Applied physics 23 (1980), S. 113-119 
    Details
    ISSN: 1432-0630
    Keywords: 42.65 ; 42.80
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract The travelling-wave parametric process allows the generation of intense picosecond pulses tunable between 2700 and 17,000 cm−1. Angle- and temperature tuning was investigated using LiNbO3 crystals of different cuts. Various factors determining the bandwidth of the new pulses are evaluated and experimental spectra are presented. Frequency doubling readily leads to light pulses up to 32,000 cm−1. The jitter of two parametric systems operating in parallel is less than 1 ps for pump pulses of 7 ps.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00899704
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  • 6
    Electronic Resource
    Electronic Resource
    Laser cooling of trapped particles II (1981)
    Springer
    Applied physics 24 (1981), S. 71-84 
    Details
    ISSN: 1432-0630
    Keywords: 32 ; 42.65
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract We consider cooling of a trapped particle in the limit when the position and velocity variables do not change adiabatically. The slowly varying quantity in a harmonic trap is then the energy, and a representation based on oscillator eigenstates is used. For large excitation, fast particles, a Fokker-Planck expansion is obtained which is valid when our adiabatic description breaks down. Estimates of the initial cooling rate are given and compared with earlier results. Our treatment requires a large number of oscillator states to be coupled by each one-photon process, and in this limit the diffusion will make the expansion invalid towards the end of the cooling; our physical interpretation is that particles leak out of the trap. The opposite case, the Lamb-Dicke regime, is advantageous for cooling experiments, and then a difference equation replaces the Fokker-Planck equation of the present paper.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00900402
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  • 7
    Electronic Resource
    Electronic Resource
    Raman gain, effectiveg-value and spontaneous spin-flip Raman linewidth in Hg0.77Cd0.23Te (1983)
    Springer
    Applied physics 31 (1983), S. 195-199 
    Details
    ISSN: 1432-0630
    Keywords: 42.65 ; 71.20
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract We report on measurements of spin-flip Raman gain inn-Hg1−x Cd x Te (x=0.23, carrier density 1.0×1015cm−3) as a function of the magnetic field up to 1.6T. The measurements were carried out by a small signal gain technique at a temperature of 1.8 K. Furthermore, the measurements yield lineshapes and linewidths of the spontaneous scattering and allow a precise determination of the effectiveg-value. The highest gain observed is 0.2 cm/W. The band edge value of the effectiveg-value is −93.2 and the widths of the symmetric lines are between 18 and 120 G, depending on the magnetic field.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00614954
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  • 8
    Electronic Resource
    Electronic Resource
    Influence of the optical activity on hologram formation in photorefractive crystals (1984)
    Springer
    Applied physics 33 (1984), S. 227-230 
    Details
    ISSN: 1432-0630
    Keywords: 42.40 ; 42.65
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: 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.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00614662
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  • 9
    Electronic Resource
    Electronic Resource
    Nonlinear optical properties of commercial semiconductor-doped glasses (1987)
    Springer
    Applied physics 44 (1987), S. 285-292 
    Details
    ISSN: 1432-0630
    Keywords: 78.20 ; 42.65 ; 81.40
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract We report new observations made on semiconductor-doped glasses commercially available. We have observed that the modulus of the Kerr susceptibility is proportional to the absorption coefficient below, across and above the gap. We have measured the phase of this susceptibility for various values of the excess energy. We have also observed a blue shift of the absorption edge following pulsed excitation and have measured the diameter of the crystallites to be ∼ 70–80 Å. The band-filling model is the most appropriate to account for the nonlinear properties of these glasses.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00624594
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  • 10
    Electronic Resource
    Electronic Resource
    Subharmonic generation in photorefractive crystals: Application of theory to experiment (1992)
    Springer
    Applied physics 55 (1992), S. 55-60 
    Details
    ISSN: 1432-0630
    Keywords: 42.40 ; 42.65 ; 42.70
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract The main results of the theory of spatial subharmonics in photorefractive crystals are summarized. The theory shows that Kukhtarev's equations for the photorefractive response are not valid for sufficiently large values of the mobility-lifetime product and for certain parameters (external field, frequency detuning, grating vector, pump intensity) of a two-beam experiment. The solution for the space-charge field including only the fundamental and the higher harmonics is not stable against the generation of new spatial frequencies. The condition of subharmonic generation and the main characteristics of the subharmonics are expressed by standard experimental and crystal parameters. Good quantitative agreement between theory and experiment is obtained. The prospects of further investigations of subharmonics are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00324602
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