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Journal of the Optical Society of America B

Journal of the Optical Society of America B


  • Editor: Henry van Driel
  • Vol. 29, Iss. 7 — Jul. 1, 2012
  • pp: 1599–1605

Enhancement of the Q value of a microring resonator by introducing curved photonic crystal waveguides

Jun-ichiro Sugisaka, Noritsugu Yamamoto, Makoto Okano, Kazuhiro Komori, and Masahide Itoh  »View Author Affiliations

JOSA B, Vol. 29, Issue 7, pp. 1599-1605 (2012)

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The aim of this work is to enhance the Q value of a photonic crystal microring resonator that can be used to buffer optical signals (in a pulse train). A conventional photonic crystal microring resonator having 60° bends exhibits poor confinement of light due to the radiation losses at the bending points. Hence, we replaced conventional bent waveguides with circularly curved ones. The Q value of the resulting ring resonator is measured, and we demonstrate, as an example, an eightfold enhancement of the Q value at a wavelength of 1340 nm. Finally, we also estimate the Q value of a ring waveguide that excludes the optical coupling between the input/output waveguides, showing that the replacement of a sharply bent waveguide by a curved one increases the Q value by up to 5.2 times at a wavelength of 1340 nm.

© 2012 Optical Society of America

OCIS Codes
(210.4680) Optical data storage : Optical memories
(050.5298) Diffraction and gratings : Photonic crystals

ToC Category:
Diffraction and Gratings

Original Manuscript: January 11, 2012
Revised Manuscript: March 14, 2012
Manuscript Accepted: April 17, 2012
Published: June 12, 2012

Jun-ichiro Sugisaka, Noritsugu Yamamoto, Makoto Okano, Kazuhiro Komori, and Masahide Itoh, "Enhancement of the Q value of a microring resonator by introducing curved photonic crystal waveguides," J. Opt. Soc. Am. B 29, 1599-1605 (2012)

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