Abstract
One thousand volume holographic data pages, each containing , are stored in a common volume of by use of the 90° geometry. An effective transverse aperture of , realized by repetition of this experiment at each of the eight surrounding locations, results in a demonstrated areal density of . Short-focal-length Fourier optics provide a tightly confined object beam at the crystal; the reference beam is angle multiplexed. Data pages retrieved with a camera are processed to remap bad spatial light modulator pixels and to compensate for global and local pixel misregistration and are then decoded with a strong 8-bits-from-12-pixels modulation code. The worst-case raw bit-error rate (BER) before error correction was , sufficient to deliver a user BER of at an overall code rate of 0.61 user bits per detector pixel. This result corresponds to 1.08% of the well-known theoretical volumetric density limit of .
© 2001 Optical Society of America
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