Optimized Coupler Design for Slot Waveguide Ring Resonators

Author

Strain, Michael J. ; Sorel, Marc

Author_Institution

Inst. of Photonics, Univ. of Strathclyde, Glasgow, UK

Volume

26

Issue

3

fYear

2014

fDate

Feb.1, 2014

Firstpage

224

Lastpage

226

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.

Keywords

bending; geometrical optics; integrated optics; optical couplers; optical design techniques; optical fabrication; optical losses; optical resonators; optical variables measurement; optical waveguides; bending loss measurement; optical coupler design optimization; resonance extinction; slot waveguide microresonator power couplers; slot waveguide ring resonator design; slot waveguide ring resonator fabrication; slot waveguide ring resonator geometry; tribar evanescent field coupler; Couplers; Couplings; Optical ring resonators; Optical waveguides; Silicon; Waveguide discontinuities; Integrated optics; optical design; optical device fabrication; optical resonators;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2013.2290693

Filename

6662452