Stabilized photorefractive modulation recording beyond 100% diffraction efficiency in LiNbO_3:Fe crystals

Polymer-Stabilized Diffraction Gratings from Cholesteric Liquid Crystals

Stabilized selective photorefractive holographic erasure

We report the selective erasure of a previously recorded 100% diffraction efficiency grating in a photorefractive lithium niobate crystal. Both the recording and the selective erasure are carried out using self-stabilized holographic recording techniques. The recording and the erasure are shown to be in excellent agreement with the proposed corresponding theoretical model. After erasure, a grat...

Nonvolatile storage in photorefractive crystals.

Holographic storage in photorefractive crystals'` 3 has a high storage density owing to three-dimensional storage and a high readout rate owing to parallel retrieval. The practical development of such memories has been impeded by a lack of materials that have all the suitable properties. Specifically, the most difficult requirement to satisfy is the simultaneous need for materials that are maxi...

Solitonic lattices in photorefractive crystals.

Two-dimensional spatial solitonic lattices are generated and investigated experimentally and numerically in a Sr(x)Ba(1-x)Nb(2)O(6):Ce crystal. An enhanced stability of these lattices is achieved by exploiting the anisotropy of coherent soliton interaction, in particular the relative phase between soliton rows. The manipulation of individual soliton channels is achieved by the use of supplement...

Anisotropic diffraction of light by volume holographic grating in birefringent photorefractive crystals with extended wavelength range.

The properties of anisotropic diffraction of light by volume holographic grating in birefringent photorefractive crystals are discussed. This diffraction takes place when the refractive index for diffracted light is different from the refractive index for incident light. It is found that in some special geometry of wavevector diagram the diffraction becomes less sensitive to the wavelength mism...