18 August 1995 Optimum conditions for high-fidelity holographic storage in photorefractive crystals
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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 (pi) /2 and -(pi) /2 phase shift between the interference fringes and the refractive index gratings. The theoretical results suggest that the case of (pi) /2 phase shift has the optimum conditions for high-fidelity holographic storage of the gray-level images. On the other hand, the case of -(pi) /2 phase shift is suitable for information processing in the Fourier plane. The experimental results are in agreement with the theoretical predictions.
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Shiuan-Huei Lin, Shiuan-Huei Lin, Pochi Yeh, Pochi Yeh, Mei-Li Hsieh, Mei-Li Hsieh, Ken Yuh Hsu, Ken Yuh Hsu, Tai Chiung Hsieh, Tai Chiung Hsieh, } "Optimum conditions for high-fidelity holographic storage in photorefractive crystals", Proc. SPIE 2529, Photorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications, (18 August 1995); doi: 10.1117/12.217002; https://doi.org/10.1117/12.217002

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