Optical demultiplexers based on arrayed waveguide grantings (awg) analysing te-and tm-polarisation directions

摘要

An optical waveguide device formed on an integrated planar substrate and comprising at least two signal demultiplexers each arranged to demultiplex input light into a plurality of output channels, each of said two demultiplexers being arranged to demultiplex respective different polarisation modes, an input waveguide for receiving input light and providing an input path to a polarisation splitter arranged to supply light or different polarisation modes from the input light to said two demultiplexers, and a plurality of light output paths from each of said demultiplexers arranged to direct said output channels to a plurality of light output detecting locations.