Optical filters in Silicon-on-Insulator: design considerations for devices based upon strip and rib waveguides

摘要

The transfer function of a photonic filter is significantly influenced by the profile of the waveguides forming the device, In this work we discuss requirements for devices based on two geometries - rib and wire shaped waveguides in Silicon-on-Insulator, from both the modal and polarisation standpoints. General guidelines and recommendations for the design of single-mode and polarisation-independent ring resonator filters with large Free Spectral Range (>30nm) are given, together with supportive experimental results.