A one-megapixel reflective spatial light modulator system for holographic storage

  • Authors:

  • J. L. Sanford;P. F. Greier;K. H. Yang;M. Lu;R. S. Olyha, Jr.;C. Narayan;J. A. Hoffnagle;P. M. Alt;R. L. Melcher

  • Affiliations:

  • IBM Research Division, Thomas J. Watson Research Center, P.O. Box 218, Yorktown Heights, New York;IBM Research Division, Thomas J. Watson Research Center, P.O. Box 218, Yorktown Heights, New York;IBM Research Division, Thomas J. Watson Research Center, P.O. Box 218, Yorktown Heights, New York;IBM Research Division, Thomas J. Watson Research Center, P.O. Box 218, Yorktown Heights, New York;IBM Research Division, Thomas J. Watson Research Center, P.O. Box 218, Yorktown Heights, New York;IBM Research Division, East Fishkill facility, Hopewell Junction, New York;IBM Almaden Research Center, 650 Harry Road, San Jose, California;IBM Research Division, Thomas J. Watson Research Center, P.O. Box 218, Yorktown Heights, New York;IBM Research Division, Thomas J. Watson Research Center, P.O. Box 218, Yorktown Heights, New York

  • Venue:
  • IBM Journal of Research and Development
  • Year:
  • 1998

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Abstract

A prototype reflective spatial light modulator (SLM) system has been developed for writing megabit pages of data into a holographic medium at a rate of 12 pages per minute. The SLM is based upon a crystalline-silicon reflective active-matrix array with integrated data drivers, using liquid crystal (LC) electrooptics and a personal computer system with an interface to provide data. The LC has been optimized for high contrast and efficiency with coherent illumination. The resolution-limited contrast was measured at 4:1, which was high enough to provide bit-error-free charge-coupled-device images using modulation and error-correction codes.