Nonlinearity and disorder in fiber arrays.
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.
Pertsch
Thomas
T
Friedrich-Schiller-Universität Jena, Max-Wien-Platz 1, 07743 Jena, Germany.
Peschel
Ulf
U
Kobelke
Jens
J
Schuster
Kay
K
Bartelt
Hartmut
H
Nolte
Stefan
S
Tünnermann
Andreas
A
Lederer
Falk
F