Title :
Optimized Coupler Design for Slot Waveguide Ring Resonators
Author :
Strain, Michael J. ; Sorel, Marc
Author_Institution :
Inst. of Photonics, Univ. of Strathclyde, Glasgow, UK
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;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2013.2290693
