OSA's Digital Library

Journal of Lightwave Technology

Journal of Lightwave Technology


  • Vol. 24, Iss. 12 — Dec. 1, 2006
  • pp: 5019–5024

Deeply Etched SiO2 Ridge Waveguide for Sharp Bends

Daoxin Dai and Yaocheng Shi

Journal of Lightwave Technology, Vol. 24, Issue 12, pp. 5019-5024 (2006)

View Full Text Article

Acrobat PDF (1168 KB)

Browse Journals / Lookup Meetings

Browse by Journal and Year


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools

  • Export Citation/Save Click for help


A deeply etched SiO2 ridge waveguide including the buffer, core, and cladding is presented for realizing sharp bends. The present SiO2 ridge waveguide has a strong confinement at the lateral direction, while it has a weak confinement at the vertical direction. Due to the strong confinement, a sharp bend (with a very small bending radius of about 10 μm) is obtained for an acceptable bending loss. A detailed analysis of the loss in a bent waveguide is given by using a finite-difference method. In order to reduce the transition loss, a narrow bending section with an optimal lateral offset is used. A low leakage loss is obtained by using wide straight waveguides, and linear tapers are used to connect the wide straight section and narrow bent sections.

© 2006 IEEE

Daoxin Dai and Yaocheng Shi, "Deeply Etched SiO2 Ridge Waveguide for Sharp Bends," J. Lightwave Technol. 24, 5019-5024 (2006)

Sort:  Journal  |  Reset


  1. M. K. Smit, C. van Dam, "Phasar-based WDM-devices: Principles, design and applications," IEEE J. Sel. Topics Quantum Electron. 2, 236-250 (1996).
  2. Y. Hibino, "Recent advances in high-density and large-scale AWG multi/demultiplexers with higher index-contrast silica-based PLCs," IEEE J. Sel. Topics Quantum Electron. 8, 1090-1101 (2002).
  3. K. Okamoto, "Recent progress of integrated optics planar lightwave circuits," Opt. Quantum Electron. 31, 107-129 (1999).
  4. T. Miya, "Silica-based planar lightwave circuits: Passive and thermally active devices," IEEE J. Sel. Topics Quantum Electron. 6, 38-45 (2000).
  5. F. Grillot, L. Vivien, S. Laval, D. Pascal, E. Cassan, "Size influence on the propagation loss induced by sidewall roughness in ultrasmall SOI waveguides," IEEE Photon. Technol. Lett. 16, 1661-1663 (2004).
  6. M. Popović, K. Wada, S. Akiyama, H. A. Haus, J. Michel, "Air trenches for sharp silica waveguide bends," J. Lightw. Technol. 20, 1762-1772 (2002).
  7. S. Akiyama, M. Popović, P. T. Rakich, K. Wada, J. Michel, H. A. Haus, E. P. Ippen, L. C. Kimerling, "Air trench bends and splitters for dense optical integration in low index contrast," J. Lightw. Technol. 23, 2271-2277 (2005).
  8. H. Y. Ou, "Trenches for building blocks of advanced planar components," IEEE Photon. Technol. Lett. 16, 1334-1336 (2004).
  9. D. Dai, S. He, "Analysis for characteristics of bent rib waveguides," J. Opt. Soc. Amer. A, Opt. Image Sci. 21, 113-121 (2004).
  10. N.-N. Feng, G.-R. Zhou, W. P. Huang, "Computation of full-vector modes for bending waveguide using cylindrical perfectly matched layers," J. Lightw. Technol. 20, 1976-1980 (2002).
  11. A. V. Lavrinenko, L. H. Frandsen, J. Fage-Pedersen, P. I. Borel, "Photonic crystal waveguides based on an antiresonant reflecting platform," Proc. 7th Int. Conf. Transparent Opt. Netw. (2005) pp. 273-276.
  12. M. Kihtoku, T. Hirono, S. Oku, Y. Kadota, Y. Shibata, Y. Yoshikuni, "Control of higher order leaky modes in deep-ridge waveguides and application to low-crosstalk arrayed waveguide gratings," J. Lightw. Technol. 22, 499-508 (2004).
  13. I. C. Goyal, R. L. Gallawa, A. K. Ghatak, "Bent planar waveguides and whispering gallery modes: A new method of analysis," J. Lightw. Technol. 8, 768-774 (1990).
  14. D. Dai, J. He, S. He, "Novel compact silicon-on-insulator-based multimode interference coupler with bi-level taper structures," Appl. Opt. 44, 5036-5041 (2005).
  15. T. Kitoh, N. Takato, M. Yasu, "Bending loss reduction in silica-based wave-guides by using lateral offsets," J. Lightw. Technol. 13, 555-562 (1995).

Cited By

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