Three-dimensional 4×4 polymer optical switch using vertical multimode interference couplers for flexible expansion of connectable vertical distant

We proposed a 3D 4×4 optical switch using vertical multimode interference (VMMI) couplers. This device can flexibly expand vertical connectable distance varying the height of the MMI coupler. We fabricated the device with a VMMI height of 10.0 μm as well as a wide band optical switching. And we measured fundamental operation and combine results.