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Threshold of oscillation in a ring-loop phase conjugator as a second-order optical phase transition
The threshold behavior is studied for a ring-loop coherent oscillator with a photorefractive strontium barium niobate (SBN) sample. A soft onset of...
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Model of deep and shallow traps for the crystal Ba0.77Ca0.23TiO3
A model of deep and shallow traps has been applied in order to explain the temporal development of the signal wave amplification as well as the pump...
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Optical holographic memory using angular-rotationally phase-coded multiplexing in a LiNbO3:Fe crystal
We propose a new holographic memory scheme based on random-phase-coded multiplexing in a photorefractive LiNbO 3 :Fe crystal. Experimental results show...
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Incoherently coupled bright–dark hybrid soliton families in biased photovoltaic–photorefractive crystals
The propagation of multiple mutually incoherent spatial solitons in biased photovoltaic–photorefractive crystals is investigated under steady-state...
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Effect of partial coherence on four-wave mixing in photorefractive materials via reflection grating approximation
We investigate the effect of beam coherence on four-wave mixing via reflection gratings in photorefractive media. For the case of phase conjugation,...
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Photorefractive optical properties of volume phase gratings induced in sillenite crystals, when the grating vector lies on the (111) plane
We study the diffraction efficiency of volume phase gratings in Bi 12 GeO 20 , when the grating vector, lying on a (111) plane, is at an angle with...
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Experimental determination of the electro-optic coefficients in Ba0.77Ca0.23TiO3
We propose an experimental method for the determination of the electro-optic coefficients of photorefractive crystals. Using anisotropic properties...
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Transient conical parametric scattering of two orthogonally polarized waves in BaTiO3
The strength of the transient parametric scattering in BaTiO 3 is shown to be strongly dependent on the initial conditions of the sample illumination....
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Mutually pumped phase conjugator using a BaTiO3 crystal having two inclined faces
A pentagon-shaped undoped BaTiO 3 crystal was used to construct a high-quality mutually pumped phase conjugator. It yields two very stable...
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Spatial subharmonics in a photorefractive semiconductor
The generation of spatial subharmonics is reported in a photorefractive semiconductor (CdTe:Ge) for the first time to our knowledge. Space charge...
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Light-induced charge-transport properties of photorefractive barium-calcium-titanate crystals doped with rhodium
Nominally pure and rhodium-doped barium-calcium-titanate crystals of the congruently melting composition Ba 0.77 Ca 0.23 TiO 3 (BCT) are grown by the...
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Photorefractive two-beam coupling characterization of a barium-calcium titanate crystal
We present two-beam coupling characterization of Ba 0.77 Ca 0.23 TiO 3 , a ferroelectric material with no phase transition around room temperature that...
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Pump induced normal mode splittings in phase conjugation in a Kerr nonlinear waveguide
Phase conjugation in a Kerr nonlinear waveguide is studied with counter-propagating normally incident pumps and a probe beam at an arbitrary angle of...
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Studies of impurity levels in Rh-doped and Ce-doped photorefractive BaTiO3
Impurity levels, light-induced and thermo-induced charge transfer processes in Rh-doped and Ce-doped photorefractive BaTiO 3 were studied. The thermal...
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Nonlinear optical response of a dense two-level atom system embedded in a linear dielectric medium
The nonlinear optical (local) response of a dense collection of two-level atoms embedded in a linear dielectric medium is investigated theoretically....
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Photorefractive two-wave mixing in the presence of an incoherent beam
We present the numerical results of the photorefractive two-wave mixing in the presence of an incoherent beam by considering the influence of the...
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Multiple-pattern stability in a photorefractive feedback system
We report on the observation of a multiple-pattern stability region in a photorefractive single-feedback system. Whereas hexagonal patterns are...
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Holographic-type parametric scattering: The universal character of the seed radiation
It is concluded on the basis of experimentally obtained time dependences of the intensity of holographic-type parametric scattering induced by...
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Optical measurements with phase-conjugate mirrors
Phase-conjugate mirrors on the basis of photorefractive crystals offer interesting possibilities of application for optical measurement systems. In...
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Laser mode manipulation by intracavity dynamic holography: Application to mode selection
Intra-cavity dynamic holography is proposed as a self-adaptive, easy to set up technique for efficient laser mode manipulation. A first...