Theoretical investigation of the time behavior of self-focused light pulses propagating in biased photorefractive media and experimental evidence on Bi12TiO20

Delphine Wolfersberger; Nicolas Fressengeas; Jean Maufoy; Godefroy Kugel

doi:10.1117/12.326847

9 October 1998 Theoretical investigation of the time behavior of self-focused light pulses propagating in biased photorefractive media and experimental evidence on Bi₁₂TiO₂₀

Delphine Wolfersberger, Nicolas Fressengeas, Jean Maufoy, Godefroy Kugel

Author Affiliations +

Proceedings Volume 3470, Photorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications IV; (1998) https://doi.org/10.1117/12.326847
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1998, San Diego, CA, United States

Abstract

This paper presents a theoretical and experimental investigation of the self-focusing of a laser pulse in a photorefractive medium on a nanosecond time-scale. For times shorter than the dielectric recombination time, we analyze the space-charge field build-up with respect to time and space and provide strong hints on the short time self- focusing of a narrow powerful beam. In order to validate our theoretical and numerical analysis, systematic investigations were performed on a Bi₁₂TiO₂₀ crystal, to show the effect of the external applied electric field, the intensity of the laser pulse and the beam waist.

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Delphine Wolfersberger, Nicolas Fressengeas, Jean Maufoy, and Godefroy Kugel "Theoretical investigation of the time behavior of self-focused light pulses propagating in biased photorefractive media and experimental evidence on Bi₁₂TiO₂₀", Proc. SPIE 3470, Photorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications IV, (9 October 1998); https://doi.org/10.1117/12.326847

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