High Q-factor microring resonator wrapped by the curved waveguide

In this work, we study the performances of ring resonators of different type by analyzing the bending loss and the condition of the critical coupling. We propose that the bending loss of microring can be reduced by wrapping a concentrically curved waveguide. The difference of propagation constant be...

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Bibliographic Details
Published in:Scientific reports 2015-05, Vol.5 (1), p.10078-10078, Article 10078
Main Authors: Cai, Dong-Po, Lu, Jyun-Hong, Chen, Chii-Chang, Lee, Chien-Chieh, Lin, Chu-En, Yen, Ta-Jen
Format: Article
Language:English
Subjects:
639/624/1111/1113
639/624/400/1103
Electric fields
Humanities and Social Sciences
Light
multidisciplinary
Optics
Propagation
Racetracks
Science
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Summary:In this work, we study the performances of ring resonators of different type by analyzing the bending loss and the condition of the critical coupling. We propose that the bending loss of microring can be reduced by wrapping a concentrically curved waveguide. The difference of propagation constant between two concentrically curved waveguides can be tuned by adjusting the bus waveguide width to optimize the critical coupling. Furthermore, we propose to enlarge the difference of the propagation constant between two concentrically curved waveguides to maintain the circulating light in the ring to obtain higher quality factor. In this study, the highest quality factor that we measured is 7 × 10 5 .
ISSN:2045-2322
2045-2322
DOI:10.1038/srep10078