Polarisation-insensitive arrayed-waveguide gratingmultiplexer with SiO ₂ -on-SiO ₂ structure

Abstract

An arrayed-waveguide grating multiplexer with SiO2-on-SiO2 structure is fabricated in order to achieve polarisation insensitivity. A negligible wavelength response dependence on polarisation of 0.01 nm, which corresponds to a birefringence of –9 × 10-6, is realised in a 16 channel arrayed-waveguide grating multiplexer with a wavelength spacing of 0.8 nm.