Abstract
Novel applications of photorefractive effect to optical signal processing are proposed and demonstrated. The applications of two-wave mixing (2-WM) in a bulk photorefractive crystal include logic operations and cross connect. Photorefractive crystal waveguide (PCW) is another primary concern. Holographic storage of Fourier transformed image in PCW and its application to optical neural network, two-dimensional array of PCW as a storage device, phase conjugate mirror using PCW, and structural consideration of PCW for efficient 2-WM are investigated. In the experiments,LiNbO 3 andBaTiO 3 waveguides are used.BaTiO 3 waveguide will be tested here for the first time. In a long-term prospect, all these technologies will eventually find important roles in optical signal processing.
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Kitayama, KI., Ito, F. Optical signal processing using photorefractive effect. Multidim Syst Sign Process 2, 401–419 (1991). https://doi.org/10.1007/BF01937175
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DOI: https://doi.org/10.1007/BF01937175