Planar lightwave circuits for FTTH and photonic networks

Integrated-optic waveguide devices become more and more complicated to realize high functionality. Optical functional devices are important to solve electrical bottleneck issues. Ultra-compact and CMOS compatible silicon waveguides are important for the integration of an optical component and an electronic circuit aiming at higher level of functionalities. This paper reviews the recent progress and future prospects of PLC devices and their applications to FTTH and photonic networks.