title: Interaction of counterpropagating discrete solitons in a nonlinear one-dimensional waveguide array.
abstract: We experimentally investigate the interaction of counterpropagating discrete solitons in a one-dimensional waveguide array in photorefractive lithium niobate. While for low input powers only weak interaction and formation of counterpropagating vector solitons are observed, for higher input powers a growing instability results in discrete lateral shifting of the formed discrete solitons. Numerical modeling shows the existence of three different regimes: stable propagation of vector solitons at low power, instability for intermediate power levels leading to discrete shifting of the two discrete solitons, and an irregular temporal dynamic behavior of the two beams for high input power.
authors: Institute of Physics and Physical Technologies, Clausthal University of Technology, 38678 Clausthal-Zellerfeld, Germany.
authors: Eugene
authors: E
authors: Smirnov
authors: Milutin
authors: M
authors: Stepić
authors: Christian E
authors: CE
authors: Rüter
authors: Vladimir
authors: V
authors: Shandarov
authors: Detlef
authors: D
authors: Kip