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Volume hologram scheme using optical fiber for spatial multiplexing.

Y H Kang1, K H Kim, B Lee

  • 1School of Electrical Engineering, Seoul National University, Kwanak-gu Shinlim-dong, Seoul 151-742, Korea.

Optics Letters
|May 15, 1997
PubMed
Summary

Optical fiber speckle patterns serve as reference beams for holographic data storage. This method demonstrates high spatial selectivity, enabling efficient holographic multiplexing for improved storage capacity.

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Area of Science:

  • Optics and Photonics
  • Holography
  • Optical Information Storage

Background:

  • Holographic data storage offers high density.
  • Reference beams are crucial for hologram recording and retrieval.
  • Optical fiber speckle patterns provide unique, complex wavefronts.

Purpose of the Study:

  • To investigate the use of optical fiber speckle patterns as reference beams in volume holography.
  • To evaluate the spatial selectivity of a photorefractive volume hologram system utilizing speckle reference beams.
  • To assess the feasibility of spatial (shift) multiplexing with this holographic scheme.

Main Methods:

  • Generating reference beams using speckle patterns from optical fibers.
  • Writing and reading volume holograms in a photorefractive material.
  • Implementing a spatial multiplexing scheme based on hologram shifts.
  • Comparing experimental results with numerical simulations.

Main Results:

  • Demonstrated successful use of optical fiber speckle patterns as reference beams.
  • Achieved good spatial selectivity in the photorefractive volume hologram.
  • Validated the effectiveness of spatial (shift) multiplexing.
  • Experimental data showed good agreement with numerical analysis.

Conclusions:

  • Optical fiber speckle patterns are effective reference beams for volume holography.
  • The proposed holographic scheme exhibits excellent spatial selectivity for multiplexing.
  • This approach shows promise for advanced optical data storage applications.