Self-switching in crossing waveguides with three channels consisting of nonlinear material

We examine crossing waveguides with three channels consisting of nonlinear material by means of FD-BPM (Finite Difference Beam Propagation Method). Sp ecifically, we investigate how the insertion of a multimode waveguide into the crossing section of both 1x3 and 2x3 structures influences the switchin g characteristics of output power. We then confirm that these structures ca n be favorably applied to a wide variety of all-optical devices for integra ted optics such as intensity-dependent optical switches, optical power dist ributors and so on.