Passive waveguide device technologies — Building block of functionality and integration

Abstract

1. Any function can be realized by passive waveguide devices, without emission and detection. → Appropriate selection of device structure and material is needed, because optical functional devices are not the digital circuit but analogue devices. 2. Integration is a natural consequence of the requirements of functionality, less connection points, compactness, and stabilization. → Appropriate selection of building block and technology is needed. 3. New approach and material? → Silicon photonics, InP based photonics, …?