Suppression of inter-pixel cross talk and reduction of recording spot size for high-density holographic memory
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In the previous study, we evaluated the effectiveness of an orthogonal polarizer array to suppress the inter-pixel cross talk with respect to the page data recording in holographic memory (Nobukawa et al. in Opt Express 25:22425, 2017). The reconstruction quality was improved by the use of the orthogonal polarizer array applied for the signal beam, based on the reduction of inter-pixel cross talk. In the present study, we also employed a similar polarizer array for the detection of a reconstructed image. Simultaneously, some phase shift masks and various apertures restricting the recording spot were also applied for the holographic recording. As a result, we found that the areal density and reconstruction quality were improved significantly based on the suppression of inter-pixel cross talk and reduction of recording spot size. These findings can be used for the realization of practical high-density holographic memory.
KeywordsHolographic memory Inter-pixel cross talk Areal density Recoding spot Aperture
This study is partly supported by the Japan Science and Technology Agency (JST) under the Strategic Promotion of Innovative Research and Development Program.
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