Two-Stage Taper Enhanced Ultra-High $Q$ As $_{2}$S $_{3}$ Ring Resonator on LiNbO$_{3}$ Academic Article uri icon

abstract

  • A hybrid optics platform consisting of LiNbO 3 waveguides vertically coupled to high-index-contrast As 2S 3 waveguides can provide tight bend radii for ring resonators and strong tuning capability via electrical-optic effects in LiNbO 3 substrate. A vertically integrated As 2S 3 ring resonator having an ultranarrow free spectral range (FSR) of 0.0579 nm and side-coupled to a low-index Ti-diffused:LiNbO 3 straight waveguide was designed and fabricated. Using improved design and fabrication processes, a low 1.2-dB/cm propagation loss in the ring with over 30 dB of extinction ratio was demonstrated on a fabricated 1.7-cm-long path ring resonator with a 400-μm radius, which corresponds to a calculated intrinsic quality factor-Q as high as 3.5× 10 5. To our knowledge, this is the highest Q factor reported for chalcogenide ring resonator planar waveguide devices. © 2011 IEEE.

author list (cited authors)

  • Zhou, Y., Xia, X., Snider, W. T., Kim, J., Chen, Q. i., Tan, W. C., & Madsen, C. K.

citation count

  • 15

publication date

  • September 2011