Optimum conditions for high-fidelity holographic storage in photorefractive crystals

Shiuan Huei Lin, Pochi Yeh, Mei Li Hsieh, Ken Y. Hsu, Tai Chiung Hsieh

Research output: Contribution to journalConference article

1 Scopus citations

Abstract

We present theoretical and experimental investigations on diffraction properties of transmission-type gratings in photorefractive crystals under the conditions of strong beam coupling effect between two writing beams. By using the coupled-recording-wave approach, the diffraction efficiency is derived as a function of intensity ratio of the two writing beams, the beam coupling constant, and the phase-shift between the interference fringes. Two configurations are discussed with π/2 and -π/2 phase shift between the interference fringes and the refractive index gratings. The theoretical results suggest that the case of π/2 phase shift has the optimum conditions for high-fidelity holographic storage of the gray-level images. On the other hand, the case of -π/2 phase shift is suitable for information processing in the Fourier plane. The experimental results are in agreement with the theoretical predictions.

Original languageEnglish
Pages (from-to)145-156
Number of pages12
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume2529
DOIs
StatePublished - 18 Aug 1995
EventPhotorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications 1995 - San Diego, United States
Duration: 9 Jul 199514 Jul 1995

Keywords

  • Beam coupling
  • Coupled-recording-wave approach
  • Fourier image processing
  • Gray-levels image storage
  • Photorefrctive holographic storage

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