Journal ArticleDOI
Dynamic holographic interconnects with analog weights in photorefractive crystals
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TLDR
In this paper, a photorefractive interconnect system with coherently erasable synapses (PISCES) is described, which includes Fresnel zone plates for spot array generation, amplitude and phase spatial light modulators based on liquid crystal technology, and detector arrays.Abstract:
A photorefractive interconnect system with coherently erasable synapses (PISCES) is described. Comparing holographic erasure by intensity and phase modulation of the writing beams, we find that the timeaverage technique is most amenable to system implementation. Calculations derived from a simple model of diffraction show that it is possible to find configurations that maximize the interconnection capacity. The PISCES includes Fresnel zone plates for spot array generation, amplitude and phase spatial light modulators based on liquid crystal technology,
and detector arrays, in addition to the photorefractive crystal. Alternatives for each of these elements are described.read more
Citations
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Journal ArticleDOI
Control of volume holograms
David J. Brady,Demetri Psaltis +1 more
TL;DR: In this paper, the authors show that the maximum dynamic range that a hologram can support falls inversely with the square root of the rank of the hologram, where the rank is the number of exposures needed to record the holograms.
Journal ArticleDOI
Binary phase Fresnel lenses for generation of two-dimensional beam arrays
Kasra Rastani,A. Marrakchi,Sarry F. Habiby,William M. Hubbard,Harold Gilchrist,Robert E. Nahory +5 more
TL;DR: Two known techniques of ion beam milling and thin film deposition are compared to fabricate lens arrays in SiO(2) and Si(3)N(4) to generate beams for holographic interconnections.
Journal ArticleDOI
Potentialities and limitations of hologram multiplexing by using the phase-encoding technique
TL;DR: It is demonstrated that imperfections of available optical components generate optical noise and limit the storage capacity of a pure phase-encoding system, and an improved recording technique is proposed to overcome some of these limitations.
Journal ArticleDOI
Dynamic holographic memory showing readout, refreshing, and updating capabilities.
S. Boj,G. Pauliat,Gérald Roosen +2 more
TL;DR: A new refreshing procedure for reading out a dynamic holographic memory without loss of information is proposed and the retrieved images are fed back to the memory after being thresholded and amplified.
Patent
Incoherent/coherent multiplexed holographic recording for photonic interconnections and holographic optical elements
TL;DR: In this paper, the authors proposed a novel architecture and associated apparatus for the development of highly multiplexed photonic interconnection networks and holographic optical elements with maximum optical throughput efficiency and minimum interchannel crosstalk, based on parallel incoherent/coherent holographic recording and readout principles.