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Discrete focusing in an optical fiber with a two-dimensional square array of coupled waveguides

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Abstract

We report the experimental demonstration of “discrete focusing” inside a 60-cm-long optical fiber made of a 2D square array of coupled waveguides. The suitable input amplitude and phase distributions are imposed by using a spatial light modulator. Thus we demonstrate that focusing in a single core at the output by discrete propagation is possible despite some amount of transverse heterogeneities of the waveguide array.

© 2009 Optical Society of America

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