Abstract

We report on the design, fabrication, and characterization of temperature insensitive strip silicon-on-insulator racetrack resonators. The influence of various parameters, such as waveguide width, waveguide height, ring radius, coupling length, ring gap, and operating wavelength, on temperature-dependent wavelength shift is examined. A resonant wavelength shift of $0.2\mathrm{pm}/\mathrm{K}$ at a $1550\mathrm{nm}$ wavelength is measured for $335\mathrm{nm}\times 220\mathrm{nm}$ waveguides. A significant reduction of waveguide propagation losses, improved ring Q value, and higher extinction ratio are obtained after overlaying the silicon waveguides with a polymer cladding.

© 2011 Optical Society of America

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