Massimo Giordano, Giorgio Cristiano, et al.
IEEE JESTCS
One thousand volume holographic data pages, each containing 1 × 106 pixels, are stored in a common volume of LiNbO3 by use of the 90° geometry. An effective transverse aperture of 1.6 mm × 1.6 mm, realized by repetition of this experiment at each of the eight surrounding locations, results in a demonstrated areal density of 394 pixels/μm2 (254 Gpixels/in.2). 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 1024 × 1024 CCD 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 1.1 × 10 3, sufficient to deliver a user BER of 10 12 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 1/λ3. © 2001 Optical Society of America.
Massimo Giordano, Giorgio Cristiano, et al.
IEEE JESTCS
Anthony Debunne, Kumar Virwani, et al.
JES
Geoffrey W. Burr, George Maltezos, et al.
SPIE Optical Science and Technology 2001
Hans Coufal
Journal of Molecular Structure