Optimization of pulley-type ring resonator with waveguide offset

Meng Hua Yen, Pei Yu Feng, Chu En Lin, Chii Chang Chen, Jenq Yang Chang

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


In this work, we dealt with the optimization of the pulley-type ring resonator using the offset of the straight input and output waveguide at the junction with the curved waveguide. We adopted the finite-difference time-domain method to simulate the structure. It was found that the coupling loss could be significantly reduced and the critical coupling could be precisely tuned. This results in the possibility of the Q-factor being higher than that of the structure without waveguide offset. In this study, the Q-factor of the ring resonator is increased from 9180 to 11,302. The corresponding enhancement is 23.1%.

Original languageEnglish
Article number226
Issue number5
StatePublished - 10 May 2018


  • Q-factor
  • Ring resonators
  • Waveguide offset


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