27 August 2010 A compact polarization-independent racetrack resonator with polarization-independent directional coupler and compensation sections formed by slot waveguides
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Abstract
A polarization-independent racetrack type micro-ring resonator formed by silicon-on-insulator slot waveguides with a phase compensation section included was investigated and proposed. By tuning the ratio of lengths of the slot waveguide and the channel waveguide the cumulative phase difference between quasi-TE and quasi-TM modes can be well eliminated which allows for a polarization independent operation over a wide spectral range. The finesses are 226 and 225 for the quasi-TE and quasi-TM modes respectively, with a free spectral range of 9 nm achieved as well as a compact device size of 30 μm, while delivering a good polarization-independent performance with the resonance mode mismatch less than 0.5 nm.
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Yao-Feng Ma, Yao-Feng Ma, Ding-Wei Huang, Ding-Wei Huang, } "A compact polarization-independent racetrack resonator with polarization-independent directional coupler and compensation sections formed by slot waveguides", Proc. SPIE 7764, Nanoengineering: Fabrication, Properties, Optics, and Devices VII, 776407 (27 August 2010); doi: 10.1117/12.860136; https://doi.org/10.1117/12.860136
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