The synthesis of the transfer function of an integrated spectral Bragg filter using the technique of electro-optical phase-shift keying is reported. The demonstrated time of synthesis is less than 1 mus.

. Experimental and theoretical studies of the photovoltaic shift in the position of the diffraction efficiency maximum of holograms recorded in LiNbO 3 for the case of optimal electric field multiplexing are described. The experimental data are explained using a model in which the bulk photovoltaic field is excited in a crystal that is electrically connected with a low loading resistance. We suggest that the surface conductivity of the crystal can play an important role in the formation of this effective loading resistance.