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31 January 1989 Electro-Chemically Reduced KNbO3-Crystals For Photorefractive Incoherent To Coherent Optical Conversion
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Proceedings Volume 1018, Electro-Optic and Magneto-Optic Materials; (1989)
Event: 1988 International Congress on Optical Science and Engineering, 1988, Hamburg, Germany
Strongly nonlinear optical and fast responding materials are required for real-time optical information processing. KNbO3 has been shown to have very fast photorefractive response times and good photosensitivity. With the electro-chemical reduction method developed recently we were able to improve the photorefractive properties (photoconductivity, beam coupling gain, response time) of KNbO3 by changing the valencies of iron-impurities. The preparation of large monodomain crystals with good optical and photorefractive homogeneity for photorefractive incoherent to coherent optical conversion (PICOC) is described. The image conversion was achieved by the anisotropic self-diffraction technique. The optimal crystal configuration for this application has been experimentally verified. A resolution of up to 10 linepairs per mm has been achieved for converting a white light image onto a laser beam.
© (1989) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Peter Amrhein, Eugen Voit, and Peter Gunter "Electro-Chemically Reduced KNbO3-Crystals For Photorefractive Incoherent To Coherent Optical Conversion", Proc. SPIE 1018, Electro-Optic and Magneto-Optic Materials, (31 January 1989);

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