Megapixel imaging for high-performance holographic data storage

Abstract

The imaging of 1 M pixel holographic data pages on a CCD camera in the limit of maximum data density, where every pixel corresponds to an independent data bit, is presented. For every pixel of the CCD array to provide one bit of data without oversampling, it is necessary that the image of the SLM be accurately pixel-matched to the CCD over the entire field of view. From the separation of 0 s and 1 s, the original data can be reconstructed from the holographic data pages with only 16 errors using a global threshold. With a simple local threshold, error-free readout of a megapixel page of holographic data, without oversampling, is possible.