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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. 6 — Jun. 1, 2012
  • pp: 1521–1527

Demonstration of the wide control range Q factor of ring cavity with ultrashort directional coupler and curved photonic-crystal ring waveguide

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

JOSA B, Vol. 29, Issue 6, pp. 1521-1527 (2012)

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We extend the control range of the Q factor of a ring cavity that consists of a photonic crystal. The control range, which determines the storage time (high Q) and efficiency of input and output (low Q) of light, is required to be wide for the random-access memory of an optical pulse train. The conventional photonic-crystal ring cavity with a directional coupler and a hexagonal-shape ring waveguide has a very narrow range. We replace these components by a directional coupler having flat dispersion and a circularly curved ring waveguide. We experimentally varied the Q factor by thermal modulation of the device and achieved a control range between 1.9×103 and 1.7×104.

© 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: April 11, 2012
Manuscript Accepted: April 20, 2012
Published: June 1, 2012

Jun-ichiro Sugisaka, Noritsugu Yamamoto, Makoto Okano, Kazuhiro Komori, and Masahide Itoh, "Demonstration of the wide control range Q factor of ring cavity with ultrashort directional coupler and curved photonic-crystal ring waveguide," J. Opt. Soc. Am. B 29, 1521-1527 (2012)

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