Peculiarity of multi-reflector filtering technology (invited)

The paper makes a review of different basic photonic structures which built the fundamentals of multi-reflector filtering technology aimed to develop optical tunable devices with multi-hundreds reconfigurable wavelength channels. It presents recent results of numerical investigation of novel widely tunable acousto-optic filters on LiNbO3 and thermo-optic tunable filters and reconfigurable optical add/drop multiplexers (ROADMs) on silicon-on-insulator (SOI) structures employing multi-reflector beam expanders. An original design of structures that utilizes one-dimensional photonic crystals, 2D-grating, nano-grooves, and/or p-n-doping to provide better manufacturability are discussed.