Abstract
Reviewed the problems arising during the recording of holograms in bulk media, which manifest themselves in the first queue as the spatial resonance of the hologram recording field with refractive index inhomogeneities due to the already recorded part of the holographic lattice. And secondly, as a cross-interaction of two nonlinearities at recording holograms - nonlinearity of diffraction efficiency and nonlinearity of field distribution holograms of exposure and visibility of a registered holographic lattice. It is noted that the appearance one more nonlinearity - the nonlinear photoresponse of the holographic material - for certain conditions leads not to a decrease in diffraction efficiency, but to its increase. The main classes of volume holographic media — dynamic media that form a photoresponse during the exposure without chemical treatment and with chemical treatment — are determined. The maximum achievable diffraction efficiencies for both types materials are shown. Recommendations are made to eliminate the undesirable consequences of the detected effects, based on the analysis of the basic laws of photoresponse formation taking into account spatial resonance and the presence of a formfactor.
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