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Journal of the Optical Society of America B

Journal of the Optical Society of America B


  • Editor: G. I. Stegeman
  • Vol. 23, Iss. 5 — May. 1, 2006
  • pp: 834–841

Critical coupling, oscillation, reflection, and transmission in optical waveguide-ring resonator systems

S. Darmawan and M. K. Chin  »View Author Affiliations

JOSA B, Vol. 23, Issue 5, pp. 834-841 (2006)

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We generalize an earlier published analysis of critical coupling in a single-ring resonator waveguide system [ Electron. Lett. 36, 321 (2000) ] to multiple-ring resonator all-pass and channel-dropping filter structures. The fundamental analytical relationships among coupling coefficient, internal loss, and oscillation frequency for critical coupling and oscillation conditions are derived for two and three rings coupled to single- and double-bus waveguides using the transfer-matrix method and Sylvester’s theorem. Furthermore, we derive the photonic band structure of an infinite periodic ring structure and show that, as the number of rings increases, the reflection band of the double-bus structure approaches the photonic bandgap.

© 2006 Optical Society of America

OCIS Codes
(130.2790) Integrated optics : Guided waves
(130.3120) Integrated optics : Integrated optics devices
(230.5750) Optical devices : Resonators

ToC Category:
Integrated Optics

Original Manuscript: August 5, 2005
Revised Manuscript: October 12, 2005
Manuscript Accepted: November 21, 2005

S. Darmawan and M. K. Chin, "Critical coupling, oscillation, reflection, and transmission in optical waveguide-ring resonator systems," J. Opt. Soc. Am. B 23, 834-841 (2006)

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