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Optics Letters

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  • Vol. 36, Iss. 20 — Oct. 15, 2011
  • pp: 3999–4001

Contradirectional couplers in silicon-on-insulator rib waveguides

W. Shi, X. Wang, W. Zhang, L. Chrostowski, and N. A. F. Jaeger  »View Author Affiliations


Optics Letters, Vol. 36, Issue 20, pp. 3999-4001 (2011)
http://dx.doi.org/10.1364/OL.36.003999


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Abstract

We demonstrate contradirectional couplers in silicon-on-insulator rib waveguides using a CMOS compatible technology, in which a periodic dielectric perturbation is introduced in the coupling region between two different-sized rib waveguides. This structure enables high fabrication tolerances for narrow-bandwidth add-drop filters, using commercially available deep-ultraviolet lithography, that do not suffer from having a free spectral range. The simulation using coupled-mode theory and mode-profile calculations shows good agreement with experiment. A narrow bandwidth of 0.35 nm and a low loss of less than 1 dB have been achieved experimentally.

© 2011 Optical Society of America

OCIS Codes
(130.2790) Integrated optics : Guided waves
(130.3120) Integrated optics : Integrated optics devices
(130.7408) Integrated optics : Wavelength filtering devices

ToC Category:
Integrated Optics

History
Original Manuscript: July 15, 2011
Revised Manuscript: September 2, 2011
Manuscript Accepted: September 12, 2011
Published: October 5, 2011

Citation
W. Shi, X. Wang, W. Zhang, L. Chrostowski, and N. A. F. Jaeger, "Contradirectional couplers in silicon-on-insulator rib waveguides," Opt. Lett. 36, 3999-4001 (2011)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-36-20-3999


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