title: Nonlinear directional coupler for polychromatic light.
abstract: We demonstrate that a nonlinear directional coupler with special bending of waveguide axes can be used for all-optical switching of polychromatic light with a very broad spectrum covering all of the visible region. The bandwidth of the suggested device is enhanced five times compared with conventional couplers. Our results suggest novel opportunities for the creation of all-optical logical gates and switches for polychromatic light with white-light and supercontinuum spectra.
authors: Nonlinear Physics Centre, Research School of Physical Sciences and Engineering, Australian National University, Canberra, ACT 0200, Australia. ilg124@rsphysse.anu.edu.au
authors: Ivan L
authors: IL
authors: Garanovich
authors: Andrey A
authors: AA
authors: Sukhorukov