Abstract

We demonstrate large-area silicon-on-insulator ring resonators with $Q$ values of about $2\times {10}^6$ at critical coupling and $3.6\times {10}^6$ for heavily undercoupled conditions. A model has been developed to understand the impact of waveguide backscattering and subcomponent imperfections on the spectral response of our devices. The model predicts the appearance of signals at ports that would not have them under backscattering-free, ideal-power-splitting conditions. The predictions of our model are shown to match the phenomena observed in our measurements.

© 2016 Optical Society of America

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