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  • Articles  (14)
  • 42.65  (14)
  • Springer  (14)
  • Blackwell Publishing Ltd
  • 1995-1999
  • 1980-1984  (14)
  • 1925-1929
  • 1997
  • 1981  (14)
  • 1928
  • Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics  (14)
Collection
  • Articles  (14)
Source
Keywords
Publisher
  • Springer  (14)
  • Blackwell Publishing Ltd
Years
  • 1995-1999
  • 1980-1984  (14)
  • 1925-1929
Year
Topic
  • Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics  (14)
  • Physics  (16)
  • 1
    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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  • 2
    Electronic Resource
    Electronic Resource
    Possibility of fast deep cooling of atomic or molecular gases by laser radiation (1981)
    Springer
    Applied physics 24 (1981), S. 119-120 
    Details
    ISSN: 1432-0630
    Keywords: 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 A technique of fast deep cooling of atomic or molecular buffer gases by laser radiation is proposed. With Na vapor as a cooling agent interacting with a laser field a cooling time of about 10−3s and minimum temperature of about 25K can be attained.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00902266
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  • 3
    Electronic Resource
    Electronic Resource
    Laser multiphoton and multistep photoionization of molecules and mass spectrometry (1981)
    Springer
    Applied physics 24 (1981), S. 89-106 
    Details
    ISSN: 1432-0630
    Keywords: 33 ; 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 A review of laser-induced photoionization of polyatomic molecules and the application of this process in mass-spectrometry is presented. Combination of laser selective photoionization and mass spectral analysis of fragments as a promising tool for the detection of trace amounts of complex molecules is considered particularly.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00902263
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  • 4
    Electronic Resource
    Electronic Resource
    A perturbative description of coherent multiphoton resonant processes (1981)
    Springer
    Applied physics 24 (1981), S. 349-355 
    Details
    ISSN: 1432-0630
    Keywords: 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 construct field equations and generalised Bloch equations for multiphoton processes involving the coherent interaction of a number of distinct electric fields with an arbitrary number of atomic eigenstates, and apply the equations to some physical examples. Transient stimulated hyper-Raman scattering, in the low-conversion regime and far from saturation, has been studied analytically. Assuming that the pump pulse interacts with the medium byn-photon absorption, we find expression for the intensity of the generated Stokes pulse.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00899733
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  • 5
    Electronic Resource
    Electronic Resource
    A monochromatic and frequency stabilized cw source in the 5 μm region obtained by doubling the frequencies of a cw laser in tellurium (1981)
    Springer
    Applied physics 24 (1981), S. 21-22 
    Details
    ISSN: 1432-0630
    Keywords: 42.60 ; 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 In this paper we describe the construction of a monochromatic and frequency stabilized continuous wave (cw) source in the 5 μm region. It is built up by a cw single line, single-mode frequency and amplitude stabilized CO2 laser. This primary CO2 laser source is then frequency-doubled in a tellurium crystal using second harmonic generation (SHG). The obtained emission is monochromatic (half-width 50 kHz). The frequency can be varied discreetly from 4.6 μm to 5.5 μ depending on the CO2 laser line chosen.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00900391
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  • 6
    Electronic Resource
    Electronic Resource
    Observation of Ramsey resonance absorption in three separated laser fields produced by a corner reflector (1981)
    Springer
    Applied physics 24 (1981), S. 11-12 
    Details
    ISSN: 1432-0630
    Keywords: 42.65 ; 07.65 ; 33.90
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract Experimental observation of optical Ramsey interference in saturated absorption of methane in a low-pressure gas cell with three spacially separated laser beams at 3.39 μm is reported.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00900389
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  • 7
    Electronic Resource
    Electronic Resource
    Measurement of atomic parameters for the3 D 1 state of I–II (1981)
    Springer
    Applied physics 25 (1981), S. 31-34 
    Details
    ISSN: 1432-0630
    Keywords: 35 ; 42.55 ; 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 The decay rates of the3 D 1 level of I–II and the 3s 2 level of neon have been measured by the magnetic-field power dip method. The decay rate at the zero-pressure limit is found to be 7.1 MHz/2π for the3 D 1 level. The collision cross-section for excited I ions with helium atoms equals 0.19×10−15 cm2.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00935388
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  • 8
    Electronic Resource
    Electronic Resource
    Four-wave mixing and optical-field-induced helical structure in liquid crystalline materials (1981)
    Springer
    Applied physics 25 (1981), S. 49-56 
    Details
    ISSN: 1432-0630
    Keywords: 42.65 ; 78.20
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract Four-wave mixing with two circularly polarized counter-propagating waves inducing a helical birefringence structure can be used to measure a number of material parameters of a liquid crystalline medium. Application to a cholesteric substance is particularly interesting. A resonant effect is expected when the induced helix has a pitch coinciding with the natural helical pitch of the medium towards the isotropic → cholesteric transition. Field-induced shift in the transition temperature is also expected.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00935391
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  • 9
    Electronic Resource
    Electronic Resource
    Optical frequency mixing in planar waveguides: Influence of crystal orientation (1981)
    Springer
    Applied physics 26 (1981), S. 185-190 
    Details
    ISSN: 1432-0630
    Keywords: 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 Optical frequency mixing through nonlinear mode coupling in a planar waveguide, fabricated with a cubic or uniaxial dielectric, is discussed. A threewave interaction is examined and the optimum crystal orientations that lead to the highest efficiency are determined in those particular cases in which they do not depend on the field distribution of the modes. The analysis is carried out in detail for cubic crystals; sensitivity to misalignments is also studied and numerical results are reported.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00614755
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  • 10
    Electronic Resource
    Electronic Resource
    Bistability of a CO2 laser with SF6 intracavity as an absorber: Transient effects (1981)
    Springer
    Applied physics 24 (1981), S. 45-48 
    Details
    ISSN: 1432-0630
    Keywords: 42.55 ; 42.65 ; 64
    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 investigated time-dependent effects related to the bistable operation of a CO2 laser with an intracavity nonlinear absorber (SF6). The response of the system to small perturbations was sensitively dependent on the operating laser line [P(12)→P(30)] of the 10.6 μm band. The narrow bistable region forP(12), due to a very narrow hysteresis loop, can be effectively utilized for optical switching, because of its pronounced sensitivity to variations in operational parameters. The maximum admissable beam blocking time (intracavity) for spontaneous return to lasing was measured forP(16), for a range of absorber pressures. This τm is related to the relaxation time of the upper level in the absorber.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00900396
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  • 11
    Electronic Resource
    Electronic Resource
    Stimulated electronic Raman scattering in In vapor (1981)
    Springer
    Applied physics 24 (1981), S. 139-142 
    Details
    ISSN: 1432-0630
    Keywords: 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 The tuning and threshold behaviors of 5P 1/2–5P 3/2 stimulated electronic Raman scattering in In vapor were investigated. The Stokes output intensity was limited by atom depletion process in the atomic density available for the measurement. The anti-Stokes radiation observed was studied in terms of the phase matching condition.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00902270
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  • 12
    Electronic Resource
    Electronic Resource
    Laser cooling of trapped particles III: The Lamb-Dicke limit (1981)
    Springer
    Applied physics 24 (1981), S. 151-162 
    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 In this paper we consider the laser cooling of a trapped particle when the discrete nature of the quantum levels must be taken into account. We particularize the equations to the Lamb-Dicke limit when the oscillational, amplitude is much less than the optical wavelength. Then the quantum levels are coupled only to the neighbouring ones, and we can also find a small parameter to use for adiabatic elimination of rapidly varying terms. There emerges one rate equation for the probability distribution over the quantum states. The ultimate distribution is found to be of the Planckian type independently of the initial one. We solve the equation, generally and obtain the time evolution for an arbitrary initial distribution. In particular we look at an initially thermal, Poisson, or pure state distribution. For the thermal one we find that its shape is preserved during the cooling. The results are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00902273
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  • 13
    Electronic Resource
    Electronic Resource
    Measurement of spin-flip raman gain, effectiveg-value and absorption of radiation under transient electric field conditions in insb (1981)
    Springer
    Applied physics 26 (1981), S. 115-124 
    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 studied the change in Spin-flip Raman (SFR) gain and behaviour of the effectiveg-value as a function of pulsed electric fields inn-type InSb. The samples were held at 1.8 K in magnetic fields up to 1.4 T. Varying the strength of a pulsed electric field applied to the samples parallel to the magnetic field we found a direct correlation between the increase in electron temperature and the decrease of the Raman gain. Measurements of the Raman gain and spontaneous line width at different times after the starting of the electric pulse and during its fall time with a time resolution of 10 ns give no indication of a motional narrowing of the SFR line and of an increase of the gain during the decrease of the electric field pulse. These two predictions were made by Mooradian et al. (1972) to explain the observed transient increase of the intensity of the stimulated SFR Stokes radiation after an electric field across the sample was switched off. With our direct measurement of the Raman gain we could establish that at any time during and after the electric field pulse, the gain is less or equal to the value without electric field. In the electric field region from 0.3 V/cm up to 0.6 V/cm the Raman gain shows several maxima, originating from SFR scattering between different spin splitted conduction band levels. The electron distribution under pulsed electric field conditions give rise to a dynamically varying absorption mechanism of transmitted radiation. Time resolved transmission measurements explain the observed increase of stimulated SFR Stokes radiation during the switch-off time of electric field pulses by a lower absorption of radiation and not by a larger gain.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00616658
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  • 14
    Electronic Resource
    Electronic Resource
    Stimulated raman scattering up to 10 orders in an optical fiber (1981)
    Springer
    Applied physics 24 (1981), S. 303-306 
    Details
    ISSN: 1432-0630
    Keywords: 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 This paper describes the experimental investigation of stimulated Raman scattering obtained from a multimode fiber. 10 orders of stimulated Stokes scattering of wavelengths in the 546–702 nm region were obtained from a 480m multimode, low-loss, graded-index quartz fiber pumped by a 532 nm frequency-doubled YAG-Nd laser beam with a pulse duration of 7 ns, output power of 0.7 MW and repetition rates of 5 and 10 pps.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00899726
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