All-optical switching in lithium niobate directional couplers with cascaded nonlinearity.
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%.
Schiek
R
R
Baek
Y
Y
Krijnen
G
G
Stegeman
G I
GI
Baumann
I
I
Sohler
W
W