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Proceedings Paper

Photogalvanic pulsator
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Paper Abstract

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.

Paper Details

Date Published: 20 November 2002
PDF: 8 pages
Proc. SPIE 4803, Photorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications VIII, (20 November 2002); doi: 10.1117/12.452627
Show Author Affiliations
Nickolai V. Kukhtarev, Alabama A&M Univ. (United States)
Tatiana V. Kukhtareva, Alabama A&M Univ. (United States)
Mekonen Bayssie, Alabama A&M Univ. (United States)
Tracy Dean Hudson, U.S. Army Aviation and Missile Command (United States)
William A. Friday, U.S. Army Aviation and Missile Command (United States)
I. Shkolnikov, Z/I Imaging Corp. (United States)
Hossin Ahmed Abdeldayem, NASA Marshall Space Flight Ctr. (United States)
Benjamin G. Penn, NASA Marshall Space Flight Ctr. (United States)
Donald O. Frazier, NASA Marshall Space Flight Ctr. (United States)


Published in SPIE Proceedings Vol. 4803:
Photorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications VIII
Francis T. S. Yu; Ruyan Guo, Editor(s)

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