OSA's Digital Library

Journal of the Optical Society of America A

Journal of the Optical Society of America A


  • 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)

View Full Text Article

Enhanced HTML    Acrobat PDF (1305 KB)

Browse Journals / Lookup Meetings

Browse by Journal and Year


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools



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

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

Daoxin Dai and Sailing He, "Analysis of characteristics of bent rib waveguides," J. Opt. Soc. Am. A 21, 113-121 (2004)

Sort:  Author  |  Year  |  Journal  |  Reset  


  1. S. Kim, A. Gopinath, “Vector analysis of optical dielectric waveguide bends using finite-difference method,” J. Lightwave Technol. 14, 2085–2092 (1996). [CrossRef]
  2. M. L. Calvo, R. F. Alvarez-Estrada, “Three-dimensional analysis of bending losses in dielectric optical waveguides with arbitrary refractive-index profile,” J. Opt. Soc. Am. A 4, 683–693 (1987). [CrossRef]
  3. D. Dai, S. Liu, S. He, Q. Zhou, “Optimal design of an MMI coupler for broadening the spectral response of an AWG demultiplexer,” J. Lightwave Technol. 20, 1957–1961 (2002). [CrossRef]
  4. N.-N. Feng, G.-R. Zhou, W.-P. Huang, “Computation of full-vector modes for bending waveguide using cylindrical perfectly matched layers,” J. Lightwave Technol. 20, 1976–1980 (2002). [CrossRef]
  5. T. Yamamoto, M. Koshiba, “Numerical analysis of curvature loss in optical waveguides by the finite-element method,” J. Lightwave Technol. 11, 1579–1583 (1993). [CrossRef]
  6. J.-S. Gu, P.-A. Besse, H. Melchior, “Method of lines for the analysis of the propagation characteristics of curved optical rib waveguides,” IEEE J. Quantum Electron. 27, 531–537 (1991). [CrossRef]
  7. S. P. Pogossian, L. Vescan, A. Vonsovici, “The single-mode condition for semiconductor rib waveguides with large cross section,” J. Lightwave Technol. 16, 1851–1853 (1998). [CrossRef]
  8. M. K. Smit, E. C. M. Pennings, H. Blok, “A normalized approach to the design of low-loss optical waveguide bends,” J. Lightwave Technol. 11, 1737–1742 (1993). [CrossRef]
  9. H. Deng, G. H. Jin, J. Harari, J. P. Vilcot, D. Decoster, “Investigation of 3D semivectorial finite-difference beam propagation method for bent waveguides,” J. Lightwave Technol. 16, 915–922 (1998). [CrossRef]
  10. M. D. Feit, J. A. Fleck, “Analysis of rib waveguides and couplers by the propagating beam method,” J. Opt. Soc. Am. A 7, 73–79 (1990). [CrossRef]

Cited By

Alert me when this paper is cited

OSA is able to provide readers links to articles that cite this paper by participating in CrossRef's Cited-By Linking service. CrossRef includes content from more than 3000 publishers and societies. In addition to listing OSA journal articles that cite this paper, citing articles from other participating publishers will also be listed.

« Previous Article  |  Next Article »

OSA is a member of CrossRef.

CrossCheck Deposited