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Phase-to-amplitude data page conversion for holographic storage and optical encryption.

¹Budapest University of Technology and Economics, Department of Atomic Physics, Budafoki út 8, Budapest, Hungary. koppa@eik.bme.hu

|May 22, 2007

Summary

A novel method converts phase-modulated data pages to amplitude for efficient holographic storage and optical encryption. This technique simplifies systems and reduces complexity for data recovery.

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Area of Science:

Optics and Photonics
Information Storage
Optical Encryption

Background:

Holographic data storage commonly uses amplitude-modulated data pages.
Phase-modulated data pages offer potential advantages but require efficient recovery methods.
Existing methods for phase-modulated data recovery can be complex.

Purpose of the Study:

To propose and validate a new phase-to-amplitude conversion method for phase-modulated data pages.
To assess the performance and feasibility of the proposed conversion technique.
To compare the proposed method with existing amplitude-modulated holographic storage techniques.

Main Methods:

Interference between a data page and its pixel-shifted copy for phase-to-amplitude conversion.
Computer modeling to investigate Fourier plane homogeneity, bit error rate, and positioning tolerances.

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Experimental demonstration of the proposed method's feasibility and basic properties.

Main Results:

The proposed phase-to-amplitude conversion method enables efficient data recovery from phase-modulated data pages.
Computer modeling confirmed favorable properties like Fourier plane homogeneity and acceptable error rates.
Experimental validation demonstrated the practical feasibility of the technique.
The method allows for reduced system complexity compared to some existing approaches.

Conclusions:

Phase-modulated data pages can be efficiently utilized in holographic storage and optical encryption systems.
The developed phase-to-amplitude conversion method offers a viable and less complex solution.
This approach enhances the efficiency and practicality of holographic data storage and optical encryption.