Figure 1
From: Integrated multi-port circulators for unidirectional optical information transport
Unidirectional optical information transport arrangements. (a) Conceptually, light is unidirectionally directed between ports in such a re-routing device. (b) Schematic view of a magnet-free 4-port optical re-router used in this study. Signals in this active nonlinear system propagate in a counter-clockwise fashion. The gain (SOA) elements as well as the nonlinear decoupling (ND) segments are also depicted.
