Investigation of photorefractive subharmonics in the absence of wavemixing

Sturman, B.I.; McClelland, T.E.; Webb, David J.; Shamonina, E. and Ringhofer, K.H. (1995). Investigation of photorefractive subharmonics in the absence of wavemixing. Journal of the Optical Society of America B, 12 (9), pp. 1621-1627.


Using a new optical configuration free from the influence of photorefractive optical nonlinearity, we investigate the main characteristics of the spatial subharmonic K/2 excited in a Bi12SiO20 crystal by a light-intensity pattern with wave vector K and frequency O. It is shown that in a large region of intensity and applied electric field the optimum value O of the frequency corresponds to the conditions of parametric excitation of the weakly damped eigenmodes of the medium: the space-charge waves. The threshold and above-threshold characteristics of the subharmonic regime are in good agreement with the theory.

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Divisions: Engineering & Applied Sciences > Electrical, electronic & power engineering
Additional Information: This paper was published in Journal of the Optical Society of America B - Optical Physics and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law. © 1995 Optical Society of America.
Uncontrolled Keywords: optical configuration, photorefractive optical nonlinearity, spatial subharmonic K/2, Bi12SiO20 crystal, light-intensity pattern, wave vector K, frequency Ω, space-charge waves, subharmonic regime
Published Date: 1995-09-01



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