Investigation of photorefractive subharmonics in the absence of wavemixing

Abstract

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.

Publication DOI: https://doi.org/10.1364/JOSAB.12.001621
Divisions: Engineering & Applied Sciences > Electrical, Electronic & Power Engineering
Engineering & Applied Sciences > Aston Institute of Photonics Technology
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: http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-12-9-1621. 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
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Related URLs: http://www.opti ... josab-12-9-1621 (Publisher URL)
Published Date: 1995-09-01
Authors: Sturman, B.I.
McClelland, T.E.
Webb, David J. ( 0000-0002-5495-1296)
Shamonina, E.
Ringhofer, K.H.

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