Abstract

The use of various multiplexing methods to store data in volume holograms has been considered for high capacity data storage where compactness and large capacity are required. The two most prominent multiplexing methods are angular multiplexing¹ and wavelength multiplexing.² The capacity of angularly multiplexed volume holograms as limited by cross talk in readout has been shown³ to be favorable for actual applications calling for gigabyte capacities. In this paper, we present new results in characterizing the capacity of wavelength multiplexed holographic memory. We describe the optimum geometry for implementing such a system and give expressions describing the output signal to cross talk ratio as a function of the number of stored holograms. The results will be compared with those for angularly multiplexed holograms.

© 1992 Optical Society of America