A solution to the Kukhtarev equations is obtained for a typical holographic memory system in which multiplexed holograms, including the effects owing to a nonuniform beam profile in the focal regions, are used. The various noise mechanisms and storage capacity are analyzed on the basis of this solution. The cross-talk noise of a typical 4f holographic memory configuration with defocus is compared with that of a phase mask. It is shown that the memory capacity and the signal-to-noise can be significantly improved by design of an optimal phase mask. The experimental results with defocus and an eight-level phase mask are presented.
© 1998 Optical Society of America
[Optical Society of America ]
Qiang Gao and Raymond Kostuk, "Cross-talk Noise and Storage Capacity of Holographic Memories with a LiNbO3 Crystal in the Open-Circuit Condition," Appl. Opt. 37, 929-936 (1998)