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Towards a Realistic Modelling of Ultra-Compact Racetrack Resonators

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5 Author(s)
Masi, M. ; Dept. of Phys., Univ. of Trento, Trento, Italy ; Orobtchouk, R. ; Guofang Fan ; Fedeli, J.-M.
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We discuss all the necessary parameters to describe optical racetrack micro resonators fabricated with silicon on insulator (SOI) technology. We focus on some fundamental aspects crucial for a comprehensive and realistic modelling of racetrack resonators as building blocks of complex add-drop filters, like SCISSOR (Side-Coupled Integrated Spaced-Sequences of Resonators) or CROW (Coupled Resonator Optical Waveguides). When the radius of curvature is lower than 5 μm, and/or the separation gaps between waveguide and resonator is small, dispersion law, effective index mismatch, and mode mismatch between bend and straight waveguides are relevant for modelling. A new mode solver, specifically suited for high index contrast small mode area waveguides, is used whose results are compared with the measurement of the optical response of some resonant devices.

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Lightwave Technology, Journal of  (Volume:28 ,  Issue: 22 )