Simulation by BPM and FDTD of new thin heterogeneous optical waveguides on SOI for reconfigurable optical add/drop multiplexers

This paper presents the new type of heterogeneous optical waveguide on silicon-on-insulator (SOI) and its application for ROADM. The side p-n-doping of 220 nm times 35 mum silicon core provides quasi-single-mode behavior due to small optical losses for fundamental mode with 10 mum mode width and increasing losses for the higher modes.