title: Spectral pulse transformations and phase transitions in quadratic nonlinear waveguide arrays.
abstract: We study experimentally and numerically the dynamics of a recently found topological phase transition for discrete quadratic solitons with linearly coupled SH waves. We find that, although no stationary states are excited in the experimental situation, the generic feature of the phase transition of the SH is preserved. By utilizing simulations of the coupled mode equations we identify the complex processes leading to the phase transition involving spatial focusing and the generation of new frequency components. These distinct signatures of the dynamic phase transition are also demonstrated experimentally.
authors: Institute of Applied Physics, Abbe Center of Photonics, Friedrich-Schiller-Universitat Jena, Max-Wien-Platz 1, 07743 Jena, Germany. f.setzpfandt@uni-jena.de
authors: Frank
authors: F
authors: Setzpfandt
authors: Andrey A
authors: AA
authors: Sukhorukov
authors: Dragomir N
authors: DN
authors: Neshev
authors: Roland
authors: R
authors: Schiek
authors: Alexander S
authors: AS
authors: Solntsev
authors: Raimund
authors: R
authors: Ricken
authors: Yoohong
authors: Y
authors: Min
authors: Wolfgang
authors: W
authors: Sohler
authors: Yuri S
authors: YS
authors: Kivshar
authors: Thomas
authors: T
authors: Pertsch