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Appl Opt. 2006 Sep 1;45(25):6374-80.

Homogenized Fourier transform holographic data storage using phase spatial light modulators and methods for recovery of data from the phase image.

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  • 1Aprilis Inc., Maynard, MA 01754, USA.


We present a method for homogenizing the Fourier spectrum for holographic digital data storage by use of a phase spatial light modulator (SLM), and methods for the recovery of data from a phase image are implemented and discussed. Binary digital data are displayed on a phase SLM operating in 0 and pi phase modes to optimally remove the intense dc peak so as to obtain a homogenized Fourier spectrum. Methods based on holographic interferometry have been developed and employed for recovery of the original amplitude data page from the phase-data page. A new edge-detection-based method also has been demonstrated and analyzed for reconstruction of the original data. Experimental results are presented to confirm the feasibility of these novel techniques.

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