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The global maxima of the electro-, piezo- and acousto-optic effects are determined for langasite crystals by extreme surfaces method. The objective functions of the optimization are the normalized optical path changes/differences for the cases of electro- or piezo-optic effects and the acousto-optic figure-of-merit M2 for the case of acousto-optic effect. The optimal orientations of the control factors...
The detection and elimination principle of redundant elements in the mathematical model is described. This principle has been used for the reduction of various mathematical models of dynamical systems in the form of systems of differential equations and artificial neural networks. In a simplified form, this principle is applied to the reduction model of optimal vector for global maximum of induced...
The information technology for most efficient and stable application of bulk and nanocrys-talline materials as sensitive elements for electro-, acousto-optic and nonlinear optical cells has been developed and approved. It is based on 3D-analysis of spatial anisotropy for appropriate induced optical effects. Our approach has been checked on example of bulk crystals: pure and MgO-doped lithium niobate,...
The general method of determination for optimal geometries of the electro-optic interaction is used for characterization of frequently applied crystalline materials of different symmetry. The most efficient geometries of the electro-optic effect are determined in KDP, KD*P, ADP, AD*P, BaTiO3, KTP, LiNbO3, LiNbO3:Mg, LiTaO3, LiIO3, HIO3, KNbO3 crystals by the extreme surfaces method.
The review of experimental and analytical investigations on 3D-analysis of spatial anisotropy and relevant search of extreme values for induced (electro-, piezo- or acousto-) optic effects in anisotropic materials is carried out. On this base it is the important fundamental conclusion: the directions of the electric field, uniaxial pressure and the polarization of light or acoustic wave that provide...
In this work we present the experimental technique suitable for the determination of all the linear electro-optic effect (LEOE) tensor components in crystal materials of any symmetry. We describe in details the sam-ple geometries that are needed to determine a complete set of the LEOE tensor components as well as derive the corresponding equations. It gives a possible to perform the electro-optic...
New method for geometry determination of most efficient application of crystalline materials as active elements of electro-optic devices is proposed. This method is based on the analysis of properties of the extremal surfaces obtained by optimization procedure and consists in the determination of such directions of the electrical field and the wave normal that maximize the path difference for two...
Acousto-optic modulators are main component of communication fibre-optic systems. From the other side the studies of the absolute piezo-optic effect (POE) are one of the important steps to estimate the acousto-optic efficiency of optical materials. In this article the investigation results of POE in calcium tungstate crystals (CaWO4) has been represented. It is also proved that this crystal is essentially...
Electrooptic and piezoelectric characteristics of langasite crystals are studied and the indicative surfaces and their stereographic projections of the corresponding effects are constructed.
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