Investigation of photorefractive subharmonics in the absence of wavemixing


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: College of Engineering & Physical Sciences > Aston Institute of Photonics Technology (AIPT)
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
Publication ISSN: 1520-8540
Last Modified: 26 Dec 2023 08:03
Date Deposited: 05 May 2011 10:55
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Related URLs: http://www.opti ... josab-12-9-1621 (Publisher URL)
PURE Output Type: Article
Published Date: 1995-09-01
Authors: Sturman, B.I.
McClelland, T.E.
Webb, David J. (ORCID Profile 0000-0002-5495-1296)
Shamonina, E.
Ringhofer, K.H.



Version: Published Version

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