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DTIC ADA274249: High-Speed, High-Density, Coherent Time-Domain Opti...
by Defense Technical Information Center
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The objective of this research was to quantitatively
evaluate the concept of time-domain optical memory (TDOM)
using the hole-burning mechanism. The TDOM concept offers
both high speed and high memory density. The advantage of
TDOM over traditional semiconductor memory is its
inherent parallelism, which allows data to be stored and
retrieved from the memory at much higher speed. The
practical success of the proposed memory, therefore,
depends critically on-among other issues-the storage,
retrieval, and processing of images. In addition, new
data storage techniques are needed to implement a
practical memory. The last three years of this research
program have focused on (1) development of new phase
modulation techniques to enhance the storage, retrieval,
and integrity of the stored information; (2) experimental
studies of image storage and phase conjugate retrieval;
(3) Image processing; and (4) practical holographic
storage of images by using the hybrid time-frequency
approach. Specifically, SRI demonstrated data encryption
by phase modulating the read and write pulses. Image
correlation and convolution was demonstrated and its
implication for pattern recognition examined. Finally,
this laboratory demonstrated high- fidelity random access
and retrieval using holographic storage in Pr3+: YA103
with a single-frequency ring laser. These experiments
have clearly demonstrated the practical viability of TDOM
with existing technology. In the next stage of the
research, the performance Issues such as bit-error-rates,
signal-to-noise ratios, and laser stability need to be
addressed.
Date Published: 2018-03-14 02:33:54
Identifier: DTIC_ADA274249
Item Size: 39874831
Language: english
Media Type: texts
# Topics
DTIC Archive; Kachru, Ravinder; SRI I...
# Collections
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