Advertisement

A High Capacity Holographic Storage System

  • James Lipp
  • Jerry L. Reynolds

Abstract

This paper describes a potential storage system that would provide 224 bytes of data with a random access of 2μsec, and a data rate of 50 megabytes/sec. The system discussed is organized as a block oriented optically accessed memory and utilizes holography as the storage mechanism. The information is stored holographically.

The holograms are recorded in a silver halide emulsion on a glass substrate providing a nonvolatile storage medium. This technology combines high bit densities with large positional tolerances. Each holographic block consists of 512 bytes of data which have been word organized. The plate is accessed by means of a laser beam which transfers, in parallel, an entire data block to a detector array.

The system consists of the following elements: a frequency doubled Nd:YAG laser operating at 5300A; a 15-stage digital light deflector subsystem which provides 32,768 randomly accessed positions, an information storage plate, means for changing plates, a silicon integrated photodetector array that converts the 512 bytes (64 x 72 bits) of optical data into electrical signals at a nominal 1

Keywords

Detector Array Storage System Holographic Storage Positional Tolerance Silicon Photodetector 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

Notes

  1. W. Kulcke et al “Convergent Beam Digital Light Deflector” Chap. 23 of J. T. Tippett et al Optical and Electro-Optical Information Processing, MIT Press, Cambridge, 1965.Google Scholar

Copyright information

© Plenum Press, New York 1971

Authors and Affiliations

  • James Lipp
    • 1
  • Jerry L. Reynolds
    • 1
  1. 1.IBM SDDPoughkeepsieUSA

Personalised recommendations