title: Nonlinear directional coupler in periodically poled lithium niobate.
abstract: Nonlinear wave propagation was investigated experimentally in coupled waveguides by means of the cascaded nonlinearity in quasi-phase-matched second-harmonic generation. With a specially designed wave-vector-mismatch distribution along the propagation axis, cascading was optimized for low fundamental depletion. High-contrast, ultrafast all-optical switching with switching powers of tens of watts was observed.
authors: School of Optics and Center for Research and Education in Optics and Lasers, University of Central Florida, 4000 Central Florida Boulevard, Orlando, Florida 32816-2700, USA.
authors: R
authors: R
authors: Schiek
authors: L
authors: L
authors: Friedrich
authors: H
authors: H
authors: Fang
authors: G I
authors: GI
authors: Stegeman
authors: K R
authors: KR
authors: Parameswaran
authors: M H
authors: MH
authors: Chou
authors: M M
authors: MM
authors: Fejer