Computer simulation of reflective volume grating holographic data storage.
The shift selectivity of a reflective-type spherical reference wave volume hologram is investigated using a nonparaxial numerical modeling based on a multiple-thin-layer implementation of a volume integral equation. The method can be easily parallelized on multiple computers. According to the results, the falloff of the diffraction efficiency due to the readout shift shows neither Bragg zeros nor oscillation with our parameter set. This agrees with our earlier study of smaller and transmissive holograms. Interhologram cross talk of shift-multiplexed holograms is also modeled using the same method, together with sparse modulation block coding and correlation decoding of data. Signal-to-noise ratio and raw bit error rate values are calculated.
Gombköt
Balázs
B
Department of Atomic Physics, Budapest University of Technology and Economics, Hungary. gombkoto@eik.bme.hu
Koppa
Pál
P
Süt
Attila
A
L Rincz
Em Ke
EK