F. Vachss et al., CROSS-ERASURE NOISE IN HIGH-DENSITY HOLOGRAPHIC-STORAGE SYSTEMS, Journal of the Optical Society of America. B, Optical physics, 14(5), 1997, pp. 1187-1198
We consider a process by which images recorded in high-density hologra
phic storage systems may be degraded. In particular, the recording of
many holograms in the same volume results in cross erasure of each hol
ogram by the sum of all the remaining holograms superposed in the same
volume. This effect is, in general, spatially nonuniform and varies b
oth transversely across each recorded image and in depth as the image
propagates and diffracts throughout the volume of the recording medium
. We apply a three-dimensional numerical analysis to assess the bit er
ror rate (BER) resulting from this noise source as a function of vario
us recording parameters. In particular, Re use this analysis to determ
ine the optimum exposure schedule for a given BER. We then describe me
ans by which these noise sources can be largely circumvented through a
ppropriate choice of the writing-beam intensities or the recording geo
metry or the use of random-phase screens. (C) 1997 Optical Society of
America.