20 November 2002 Photogalvanic pulsator
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We have observed regenerative optical and electrical pulsations in Fe-doped photogalvanic/photorefractive crystals LiNbO3 (LN). Rise time of the emitted electromagnetic pulses was 2 ns and amplitude of up to 10V for Continuous Wave (CW) laser power 50-200 mW. Optical pulsators, predicted by our theoretical approach were realized in LiNbO3:Fe crystals using Ar-ion laser, of wavelength 514 and 457 nm, and power P= 50-200 mW, with frequencies of pulsation ranging from sec to msec. The arrays of the Optical Photogalvanic Pulsators (OPP) may be constructed as a testing field for a novel parallel processing logic based on the pulsed-couple neural networks (PCNN). We have also tested the synchronous nature of the optical, electrical and piezoelectric signals.
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Nickolai V. Kukhtarev, Nickolai V. Kukhtarev, Tatiana V. Kukhtareva, Tatiana V. Kukhtareva, Mekonen Bayssie, Mekonen Bayssie, Tracy Dean Hudson, Tracy Dean Hudson, William A. Friday, William A. Friday, I. Shkolnikov, I. Shkolnikov, Hossin Ahmed Abdeldayem, Hossin Ahmed Abdeldayem, Benjamin G. Penn, Benjamin G. Penn, Donald O. Frazier, Donald O. Frazier, } "Photogalvanic pulsator", Proc. SPIE 4803, Photorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications VIII, (20 November 2002); doi: 10.1117/12.452627; https://doi.org/10.1117/12.452627


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