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Phys Rev Lett. 2004 Jul 30;93(5):053901. Epub 2004 Jul 27.

Nonlinearity and disorder in fiber arrays.

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  • 1Friedrich-Schiller-Universit√§t Jena, Max-Wien-Platz 1, 07743 Jena, Germany.


We experimentally investigate light propagation in a disordered two-dimensional array of mutually coupled optical fibers. In the linear case light either spreads in a diffusive manner or localizes at a few sites. For high excitation power diffusive spreading is arrested by the focusing nonlinearity, i.e., forming a discrete soliton. By contrast, fields, which are localized in the linear regime, can experience both spreading and contraction caused by the nonlinearity.

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