Prescription for optimizing holograms in LiNbO3 : Fe : Mn

The photorefractive holographic dynamics of grating formation in photochrom ic doubly doped LiNbO3:Fe:Mn crystal is studied numerically and analyticall y in terms of the two-center model of Kukhtarev Et al. [Ferroelectrics 22, 949 (1979)]. The relations among the recorded and fixed space-charge fields and the doping densities, the oxidation-reduction states of the fields, an d the intensities of UV-sensitizing and red recording beams are studied. Im portant conditions and effects are feued, and an optimal prescription for m aterial doping and oxidation-reduction processing is suggested in which the crystal can be strongly oxidized and the Mn-doping density is smaller than the Fe-doping density. (C) 2000 Optical Society of America. OCIS codes: 05 0.7330, 190.5330, 090.2900.