Study on fabrication tolerances of SOI based directional couplers and ring resonators
The effect of manufacturing tolerances on directional couplers is studied in detail. Effects of wet chemical cleaning and substrate quality are studied in particular. 3D full wave FEM simulations have been carried out using Ansoft HFSS. Simulation results are emphasized by an analytical calculation of a ring resonator. Actions to compensate for fabrication tolerances have been proposed and discussed.
directional coupler ring resonators manufacturing tolerances nanophotonic devices