Optimized coupler design for slot waveguide ring resonators

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Abstract

The highly sensitive nature of slot waveguide micro-resonator power couplers is discussed with respect to the resonator geometry and evanescent coupler design. A modified, tri-bar, evanescent field coupler is demonstrated that shows reduced sensitivity to ring radius as compared with conventional couplers, while maintaining a compact beat-length of only a few micrometers. With the measurement of bending losses of curved slot waveguides, critically coupled ring resonators were designed and fabricated, exhibiting a resonance extinction exceeding 22 dB.
Original languageEnglish
Pages (from-to)224-226
Number of pages3
JournalIEEE Photonics Technology Letters
Volume26
Issue number3
DOIs
Publication statusPublished - 1 Feb 2014

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Keywords

  • integrated optics
  • optical design
  • optical device fabrication
  • optical resonators

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