Two-dimensional modulational instability in photorefractive media
نویسندگان
چکیده
منابع مشابه
Two-dimensional modulational instability in photorefractive media
We study theoretically and experimentally the modulational instability of broad optical beams in photorefractive nonlinear media. The angular dependence of the growth rate of periodic perturbations is calculated. Our findings are confirmed by experimental measurements on a strontium barium niobate photorefractive crystal.
متن کامل. op tic s ] 1 4 N ov 2 00 3 Two dimensional modulational instability in photorefractive media
A plane wave propagating in a medium with focusing nonlinearity is unstable with respect to the generation of small scale filaments [1]. This so called modulational instability (MI) phenomenon, has been extensively studied because of its importance as a factor limiting the propagation of high power beams. Filamentation may also be identified as the first stage in the development of turbulent fl...
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Modulational instability in a photorefractive medium is studied in the presence of two wave mixing. We then propose and derive a model for forward four wave mixing in the photorefractive medium and investigate the modulational instability induced by four wave mixing effects. By using the standard linear stability analysis the instability gain is obtained. In both the cases, the geometry is such...
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We study modulational instability (MI) of plane waves in nonlocal nonlinear Kerr media. For a focusing nonlinearity we show that, although the nonlocality tends to suppress MI, it can never remove it completely, irrespective of the particular profile of the nonlocal response function. For a defocusing nonlinearity the stability properties depend sensitively on the response function profile: for...
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Martin Centurion, Mason A. Porter, Ye Pu, P. G. Kevrekidis, D. J. Frantzeskakis, and Demetri Psaltis Max Planck Institute for Quantum Optics, 85748 Garching, Germany Department of Physics and Center for the Physics of Information, California Institute of Technology, Pasadena, California 91125, USA Department of Electrical Engineering, California Institute of Technology, Pasadena, California 911...
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ژورنال
عنوان ژورنال: Journal of Optics B: Quantum and Semiclassical Optics
سال: 2004
ISSN: 1464-4266,1741-3575
DOI: 10.1088/1464-4266/6/5/030