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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
Internal Reference: [N-1307]
Download: Download this Publication (735KB) (735KB)

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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