Athermal polarisation-independent arrayed- waveguide grating (AWG) multiplexer using an all-polymer approach

An athermal arrayed-waveguide grating (AWG) multiplexer relying on an all-polymer approach is reported. By properly adjusting the positive coefficient of thermal expansion of the polymer substrate and the negative thermo-optic coefficient of the polymer waveguide, athermal and polarisation-independent AWG devices are demonstrated.