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Digital data storage using volume holograms offers high density and fast readout. Current researc... more Digital data storage using volume holograms offers high density and fast readout. Current research concentrates on system design, understanding and combating noise, and developing appropriate storage materials. Possible applications include fast data servers and high-capacity optical disks.

The demand for increases in the capacity and speed of data storage tests the limits of convention... more The demand for increases in the capacity and speed of data storage tests the limits of conventional technologies and drives the search for new approaches. Optical holography has long held the promise of storage densities and data transfer rates far greater than those of traditional magnetic and optical systems. In the past, its realization has been frustrated by the lack of availability of suitable system components, the complexity of holographic multiplexing strategies, and perhaps most importantly, the absence of recording materials that satisfied the stringent requirements of holographic data storage. Here we report on the design and development of a high-performance photopolymer recording medium and on advances in the design of a holographic storage system that have enabled demonstrations of storage densities as high as 31.5 channel Gbits/in. We believe these results will provide the foundation for a practically realizable, high capacity storage system with fast transfer rates a...

Optical Engineering

An iterative method is introduced for determining the exposure schedule for multiplexing hologram... more An iterative method is introduced for determining the exposure schedule for multiplexing holograms in saturable recording materials, such as photopolymers. This method is designed to share all or part of the available dynamic range of the recording material among the holograms to be multiplexed. Using exposure schedules derived from this method, the authors find that the diffraction efficiency of DuPont's HRF-150 38-and 100-m photopolymer scale is (2.2/M) 2 and (6.5/M) 2 respectively, where M is the number of holograms recorded. Finally, 1000 holograms were multiplexed at a single location in the 100-m thick photopolymer using an exposure schedule derived with this method.

Proceedings of Spie the International Society For Optical Engineering, May 1, 2009

Thesis California Institute of Technology 1994 Source Dissertation Abstracts International Volume 55 05 Section B Page 1897, 1994

AccessScience

Digital data storage using volume holograms offers high density and fast readout. Current researc... more Digital data storage using volume holograms offers high density and fast readout. Current research concentrates on system design, understanding and combating noise, and developing appropriate storage materials. Possible applications include fast data servers and high-capacity optical disks.

The demand for increases in the capacity and speed of data storage tests the limits of convention... more The demand for increases in the capacity and speed of data storage tests the limits of conventional technologies and drives the search for new approaches. Optical holography has long held the promise of storage densities and data transfer rates far greater than those of traditional magnetic and optical systems. In the past, its realization has been frustrated by the lack of availability of suitable system components, the complexity of holographic multiplexing strategies, and perhaps most importantly, the absence of recording materials that satisfied the stringent requirements of holographic data storage. Here we report on the design and development of a high-performance photopolymer recording medium and on advances in the design of a holographic storage system that have enabled demonstrations of storage densities as high as 31.5 channel Gbits/in. We believe these results will provide the foundation for a practically realizable, high capacity storage system with fast transfer rates a...

Optical Engineering

An iterative method is introduced for determining the exposure schedule for multiplexing hologram... more An iterative method is introduced for determining the exposure schedule for multiplexing holograms in saturable recording materials, such as photopolymers. This method is designed to share all or part of the available dynamic range of the recording material among the holograms to be multiplexed. Using exposure schedules derived from this method, the authors find that the diffraction efficiency of DuPont's HRF-150 38-and 100-m photopolymer scale is (2.2/M) 2 and (6.5/M) 2 respectively, where M is the number of holograms recorded. Finally, 1000 holograms were multiplexed at a single location in the 100-m thick photopolymer using an exposure schedule derived with this method.

Proceedings of Spie the International Society For Optical Engineering, May 1, 2009

Thesis California Institute of Technology 1994 Source Dissertation Abstracts International Volume 55 05 Section B Page 1897, 1994

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