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JJAP series

Stimulated Electronic Transition Concept for an Erasable Optical Memory : Future Technology

Sacharia Albin, James D. Satira, David L. Livingston, Thomas A. Shull

Published Mar 31, 1992• 0 citations
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Progress review and future prediction for technologies in optical memory.

Kenya Goto

應用物理•Oct 10, 1999•0 citations

Stimulated Electronic Transition Concept for an Erasable Optical Memory

Sacharia Albin, James D. Satira, David L. Livingston

A new concept for an erasable optical memory is demonstrated using stimulated electronic transition (SET). Large bandgap semiconductors are suitable materials for the SET medium. We have investigated the properties of MgS:Eu, Sm and SrS:Eu, Sm as possible media for the SET process. Quantum storage is achieved in the form of charges in deep levels in the medium and stimulated radiative recombination is used as the reading process. Unlike magneto-optic (M-O) and phase change (PC) processes, optical writing, reading and erasing are achieved without localized heating. The SET process will have an inherently faster data transfer rate and a higher storage density, and the medium will be more durable than the M-O and PC media. A possible application of the SET process in neural networks is also discussed.

Japanese Journal of Applied Physics•Feb 1, 1992•42 citations

Towards high-speed optical quantum memories

K. F. Reim, Joshua Nunn, Virginia O. Lorenz +5 more

arXiv:0912.2970•Nature Photonics•Mar 7, 2010•343 citations

Erasable optical memory using stimulated electronic transition concept

Sacharia Albin, James D. Satira, Linwood Watkins +1 more

Mass storage optical memory for use aboard unmanned orbital space platforms are currently under development by NASA. These storage systems with large information capacities, high data transfer rates, and high mean time between failures are needed. An optical system using stimulated electronic transition (SET) concept would be ideal for this application. For a single reading and writing beam system, the estimated storage capacity of 66 Gbits per disk, and a data transfer rate of 186 Mbits per second can be achieved. There are several oxide and sulfide materials that can be doped with rare earth elements to produce SET for optical storage. Unlike magneto-optic and phase change processes, the SET concept does not involve localized heating which produces material fatigue. Since electronic transitions are the only processes involved in SET storage, the disk will have an infinite lifetime.© (1990) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.

Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE•Aug 1, 1990•1 citation

Theory of Optical Bistability and Optical Memory

W. J. Firth

Springer eBooks•Jan 1, 1990•0 citations

Time-Frequency Domain Memory and Processing

David L. Huestis, Gregory W. Faris, E. Arons

This report summarizes the results of a 3-year program of research on the physics and technology needed to develop high-performance optical memory and optical processing systems based on the concept called the stimulated photon echo (SPE). The research goals were investigation, demonstration, and improvement of signal strength and fidelity, architectures and algorithms, and materials properties for optical storage and in-memory processing. Key accomplishments were (1) development and demonstration of efficient algorithms for threshold discrimination and bit-error-rate reduction in retrieved binary images with large in-frame and frame-to-frame intensity variations; (2) demonstration and characterization of information storage in Erbium-doped crystals using 1.5-micron diode lasers compatible with fiber optic communications; (3) demonstration of improved phase-encoding schemes for in-memory temporal correlation of 1.5-micron pulse trains; (4) development of concepts for high-performance radar applications based on SPE optical memory for time-delay control of the transmitter array and in-memory image processing of the return signals; and (5) hosting the AFOSR Contractors' Meeting, "Optoelectronic Information Processing."

•Feb 28, 2002•0 citations
A new concept for an erasable optical memory is demonstrated using stimulated electronic transition (SET). Large bandgap semiconductors are suitable materials for the SET medium. We have investigated the properties of MgS:Eu, Sm and SrS:Eu, Sm as possible media for the SET process. Quantum storage is achieved in the form of charges in deep levels in the medium and stimulated radiative recombination is used as the reading process. Unlike magneto-optic (M-O) and phase change (PC) processes, optical writing, reading and erasing are achieved without localized heating. The SET process will have an inherently faster data transfer rate and a higher storage density, and the medium will be more durable than the M-O and PC media. A possible application of the SET process in neural networks is also discussed.
Mass storage optical memory for use aboard unmanned orbital space platforms are currently under development by NASA. These storage systems with large information capacities, high data transfer rates, and high mean time between failures are needed. An optical system using stimulated electronic transition (SET) concept would be ideal for this application. For a single reading and writing beam system, the estimated storage capacity of 66 Gbits per disk, and a data transfer rate of 186 Mbits per second can be achieved. There are several oxide and sulfide materials that can be doped with rare earth elements to produce SET for optical storage. Unlike magneto-optic and phase change processes, the SET concept does not involve localized heating which produces material fatigue. Since electronic transitions are the only processes involved in SET storage, the disk will have an infinite lifetime.© (1990) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
This report summarizes the results of a 3-year program of research on the physics and technology needed to develop high-performance optical memory and optical processing systems based on the concept called the stimulated photon echo (SPE). The research goals were investigation, demonstration, and improvement of signal strength and fidelity, architectures and algorithms, and materials properties for optical storage and in-memory processing. Key accomplishments were (1) development and demonstration of efficient algorithms for threshold discrimination and bit-error-rate reduction in retrieved binary images with large in-frame and frame-to-frame intensity variations; (2) demonstration and characterization of information storage in Erbium-doped crystals using 1.5-micron diode lasers compatible with fiber optic communications; (3) demonstration of improved phase-encoding schemes for in-memory temporal correlation of 1.5-micron pulse trains; (4) development of concepts for high-performance radar applications based on SPE optical memory for time-delay control of the transmitter array and in-memory image processing of the return signals; and (5) hosting the AFOSR Contractors' Meeting, "Optoelectronic Information Processing."