Silicon Polarization Splitter and Rotator with Tolerance to Width Variations using a Nonlinearly-Tapered and Partially-Etched Directional Coupler

Abstract

A silicon polarization splitter and rotator is experimentally demonstrated using a nonlinearly-tapered directional coupler. Adiabatic polarization splitting and rotating are achieved over a length of 129 μm. Fabrication tolerance to waveguide widths is also verified.