Optical: systems and elements – Holographic system or element – Using modulated or plural reference beams
Patent
1995-05-15
1997-08-26
Henry, Jon W.
Optical: systems and elements
Holographic system or element
Using modulated or plural reference beams
359 22, G02B 110, G02B 126
Patent
active
056615779
ABSTRACT:
Novel multiplexed volume holographic optical elements for the development of highly multiplexed photonic interconnection and holographic memory systems with maximum optical throughput efficiency and minimum crosstalk, based on parallel incoherent/coherent double angularly multiplexed volume holographic recording and readout principles, are disclosed. These principles further provide for arbitrarily weighted and independent interconnections, which are of potential importance in the development of densely interconnected photonic implementations of neural networks, photonic interconnection networks for telecommunications switching and digital computing applications, optical information processors, and optical memories. Utilization of the principles that are key features of this holographic element allows for the single step transfer of all or part of the information stored in a three-dimensional holographic storage device to a second such device in a single exposure step. Variants of the multiplexed volume holographic optical element include bulk holographic recording media as well as stratified volume holographic optical elements, comprising in either case both holographic (optical) modulation patterns and computer-generated holograms. Further variants of the multiplexed volume holographic optical element incorporate a subhologram structure within the volume holographic optical element that allows for high efficiency recording in certain real time photorefractive media.
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Jenkins B. Keith
Tanguay, Jr. Armand R.
Henry Jon W.
University of Southern California
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