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Collinear acousto-optical coupled states and binary modulation of light
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Paper Abstract

We consider some properties of the collinear acousto-optical interaction and principles of the binary encoded digital modulation of light based on exploiting collinear three-wave coupled states. The features of linearized dispersion relations are successfully used to show that the parametric coupling of light waves, being accomplished by the acoustic wave, modifies the dispersion relations for both the light waves and shapes two branches of nonlinear dispersion, whose curvatures are opposite in sign. The analytical model of shaping acousto-optical three-wave weakly coupled states is presented. The exact analytical solution allows deriving the localization condition for coupled states as well as simulating both spatio-frequency and phase distributions. The analysis developed was tested experimentally using the collinear Bragg regime of acousto-optical interaction in uniaxial single crystal. The experiments carried out make it possible to observe the dynamics of reshaping acousto-optic three-wave weakly coupled states under variations in the acoustic pulse width and the frequency mismatch. Applying the technique of localizing the coupled states to the problem of binary modulation of light beam, the conversion of multi-bit electronic signals into binary encoded optical pulse trains is demonstrated.

Paper Details

Date Published: 29 September 2005
PDF: 8 pages
Proc. SPIE 5953, Acousto-optics and Photoacoustics, 59530E (29 September 2005); doi: 10.1117/12.622277
Show Author Affiliations
Alexandre S. Shcherbakov, National Institute for Astrophysics, Optics & Electronics (Mexico)
Arturo Aguirre Lopez, Mixteca Univ. of Technology (Mexico)

Published in SPIE Proceedings Vol. 5953:
Acousto-optics and Photoacoustics
Antoni Sliwinski; Rainer Reibold; Vitaly B. Voloshinov, Editor(s)

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