Abstract

Although the holograms in photorefractive media can be manipulated dynamically, the stored holograms are partially erased by the reading beam each time the information is retrieved. There are situations where it is desirable to have holograms that can be fixed by physical processes. The diffraction of these fixed gratings is different from that of a simple Bragg scattering, because energy coupling between the reading beam and the scattered beam is caused by not only the fixed grating but also the photorefractive grating formed by these two beams.

© 1990 Optical Society of America