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Journal of the Optical Society of America A

Journal of the Optical Society of America A

| OPTICS, IMAGE SCIENCE, AND VISION

  • Vol. 21, Iss. 1 — Jan. 1, 2004
  • pp: 113–121

Analysis of characteristics of bent rib waveguides

Daoxin Dai and Sailing He  »View Author Affiliations


JOSA A, Vol. 21, Issue 1, pp. 113-121 (2004)
http://dx.doi.org/10.1364/JOSAA.21.000113


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Abstract

With a perfectly matched layer boundary treatment, a semivectorial finite-difference method is used to calculate the eigenmodes of a single-mode (SM) or multimode (MM) bent rib waveguide. A detailed analysis is given for the dependence of the bending losses (including the pure bending loss and the transition loss) on geometrical parameters of the bent rib waveguide such as the rib width, the rib height, and the bending radius. The characteristics of the higher-order modes are analyzed. It is shown that the bending loss of the fundamental mode can be reduced effectively by increasing the width and height of the rib. For an integrated device, undesired effects due to the higher-order modes of a MM bent waveguide can be removed by appropriate choice of the geometrical parameters. An appropriately designed MM bent waveguide is used to reduce effectively the bending loss of the fundamental mode, and a low-loss SM propagation in a MM bent waveguide is realized when the bending losses of the higher-order modes are large enough.

© 2004 Optical Society of America

OCIS Codes
(130.2790) Integrated optics : Guided waves
(230.7370) Optical devices : Waveguides
(230.7380) Optical devices : Waveguides, channeled

History
Original Manuscript: April 24, 2003
Revised Manuscript: August 11, 2003
Manuscript Accepted: September 2, 2003
Published: January 1, 2004

Citation
Daoxin Dai and Sailing He, "Analysis of characteristics of bent rib waveguides," J. Opt. Soc. Am. A 21, 113-121 (2004)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-21-1-113

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