Abstract

An improved postprocessing algorithm that can compensate for arbitrary misregistrations between a detector array and the coherent image of a pixelated two-dimensional data page is described. Previously [Opt. Lett. 26, 542 (2001)], an algorithm was reported in which both linear and quadratic interpixel cross-talk contributions are reallocated to the appropriate neighboring pixels. However, page misalignments close to $\pm 0.5$ pixels could not be corrected to an acceptable bit-error rate because of propagation in the iterative procedure. An improved algorithm is reported in which an intentional magnification error is introduced optically and then corrected during postprocessing. Experimental results from a pixel-matched megapel volume holographic system are presented, showing that the dependence of bit-error rate on transverse detector alignment is entirely removed. This improved procedure can completely bypass constraints on page registration, optical distortion, and material shrinkage that currently hamper page-oriented holographic storage systems.

© 2002 Optical Society of America

Compensation for pixel misregistration in volume holographic data storage

Geoffrey W. Burr and Timo Weiss
Opt. Lett. 26(8) 542-544 (2001)

Density implications of shift compensation postprocessing in holographic storage systems

Laure Menetrier and Geoffrey W. Burr
Appl. Opt. 42(5) 845-860 (2003)

Pixel-matched holographic data storage with megabit pages

R. M. Shelby, J. A. Hoffnagle, G. W. Burr, C. M. Jefferson, M.-P. Bernal, H. Coufal, R. K. Grygier, H. Günther, R. M. Macfarlane, and G. T. Sincerbox
Opt. Lett. 22(19) 1509-1511 (1997)

Volume holographic data storage at an areal density of 250 gigapixels/in.²

Geoffrey W. Burr, C. Michael Jefferson, Hans Coufal, Mark Jurich, John A. Hoffnagle, Roger M. Macfarlane, and Robert M. Shelby
Opt. Lett. 26(7) 444-446 (2001)

Gray-scale data pages for digital holographic data storage

Geoffrey W. Burr, Gabriele Barking, Hans Coufal, John A. Hoffnagle, C. Michael Jefferson, and Mark A. Neifeld
Opt. Lett. 23(15) 1218-1220 (1998)