ORTHOGONAL PHOTOREFRACTIVE GRATING STORAGE

Using multiple signal beams and controlling their relative phases, we demonstrate angular multiplexing of phase-sensitive holographic gratin gs in a photorefractive crystal. Interference between diffracted signa l beams determines total diffracted intensities as a function of the r elative phases between input signals compared with those between grati ngs. Complete constructive and destructive interference produce maximu m and near-zero diffraction, respectively, from orthogonal gratings. ( C) 1996 Optical Society of America