Abstract
This chapter reviews the spectral diffraction properties of a reflective-type volume hologram by considering photorefractive beam coupling and recording erasure dynamics. It examines the spatial diffraction properties of a nonlinear photorefractive (PR) hologram as affected by crystal refractive index anisotropy. The crystal anisotropy effects on the fidelity of the hologram image and on the multiplexing scheme are also discussed. A discussion of the combined (intrasignal) beam coupling and the crystal anisotropy effect in PR LiNbO3 crystals is provided in the chapter. PR crystals are one of the most attractive materials for recording volume holographic gratings for a variety of applications such as holographic data storage, reconfigurable interconnection, narrow-band filters, optical correlators, and optical neural networks. Their use for these applications is based on the refractive index change through the electro-optic effect as a result of the space-charge field formed upon an illumination with spatial variation in intensity.
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