title: All-optical switching in lithium niobate directional couplers with cascaded nonlinearity.
abstract: We report on intensity-dependent switching in lithium niobate directional couplers. Large nonlinear phase shifts that are due to cascading detune the coupling between the coupler branches, which makes all-optical switching possible. Depending on the input intensity, the output could be switched between the cross and the bar coupler branches with a switching ratio of 1:5 and a throughput of 80%.
authors.forename: R
authors.initials: R
authors.lastname: Schiek
authors.forename: Y
authors.initials: Y
authors.lastname: Baek
authors.forename: G
authors.initials: G
authors.lastname: Krijnen
authors.forename: G I
authors.initials: GI
authors.lastname: Stegeman
authors.forename: I
authors.initials: I
authors.lastname: Baumann
authors.forename: W
authors.initials: W
authors.lastname: Sohler