Authors:	P. De Heyn, D. Vermeulen, D. Van Thourhout, G. Roelkens
Title:	Silicon-on-insulator all-pass microring resonator using a polarization rotating coupling section
Format:	International Journal
Publication date:	5/2012
Journal/Conference/Book:	IEEE Photonics Technology Letters
DOI:	10.1109/lpt.2012.2198460
Citations:	16 (Dimensions.ai - last update: 17/11/2024) 12 (OpenCitations - last update: 10/5/2024) Look up on Google Scholar
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Abstract

We propose a novel microring resonator concept which uses a polarization rotating asymmetrical directional coupler. The quasi-TE polarized mode in the bus waveguide is used to excite the quasi-TM polarized mode in the microring. This enables the realization of microrings with a high quality factor due to the lower scattering loss of the quasi-TM polarized mode. We demonstrate the operation principle with two all-pass
microrings with radius 30 ìm, working in the critically coupled regime with a quality factor of 31000 and in the under-coupled regime with a quality factor of 125000.

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