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  • 1995-1999  (2)
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  • 1
    Electronic Resource
    Electronic Resource
    χ(3) scattering noises in nonlinear optical phase conjugation (1995)
    Springer
    Applied physics 61 (1995), S. 611-618 
    Details
    ISSN: 1432-0649
    Keywords: 42.65. - k
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Phase conjugation by Four-Wave Mixing (FWM) is treated quantum mechanically as a multiphoton scattering process. The spontaneous scattering of two counter-propagating photons gives rise to a background noise, whereas the stimulated scattering in the presence of the probe beam generates the phase conjugate signal. In addition, the stimulated scattering also contributes to a background noise which has never been discussed. Compared with Rayleigh scattering noise, the χ(3) scattering noises are relatively small for intensity up to 108 W/cm2. For higher intensities, the χ(3) scattering noises, in conjunction with the Rayleigh scattering noise, will affect the spatial fidelity of the optical phase conjugation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01091221
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Optical restoration of photorefractive holograms (1995)
    Springer
    Applied physics 61 (1995), S. 511-514 
    Details
    ISSN: 1432-0649
    Keywords: 42.30 ; 42.40 ; 42.65
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We consider the possibility of restoration and/or enhancement of decaying holograms in photorefractive media by using a simple optical readout in conjunction with a phase conjugator. The results indicate that extremely weak holograms can be enhanced provided that the two-beam coupling is sufficiently strong. Steady-state photorefractive holograms can be maintained continuously without decay by using a self-enhanced readout scheme. The results also provide an explanation for the formation of mutually pumped phase conjugation in terms of the amplification of an initial noise grating. The results are presented and discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01081282
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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