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Opt Express. 2011 Jul 4;19(14):13436-44. doi: 10.1364/OE.19.013436.

Holographic diversity interferometry for optical storage.

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Graduate School of Information Science and Technology, Hokkaido University, Sapporo, Japan.


This study proposes holographic diversity interferometry (HDI), a system that combines information from spatially dispersed plural image sensors to reconstruct complex amplitude distributions of light signals. HDI can be used to generate four holographic interference fringes having different phases, thus enabling optical phase detection in a single measurement. Unlike conventional phase-shifting digital holography, this system does not require piezoelectric elements and phase shift arrays. In order to confirm the effectiveness of HDI, we generated optical signals having multilevel phases and amplitudes by using two SLMs and performed an experiment for detection and demodulation with HDI.

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