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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 14 — Jul. 5, 2010
  • pp: 15189–15200

Efficient fiber-to-chip grating coupler for micrometric SOI rib waveguides

C. Alonso-Ramos, A. Ortega-Moñux, I. Molina-Fernández, P. Cheben, L. Zavargo-Peche, and R. Halir  »View Author Affiliations


Optics Express, Vol. 18, Issue 14, pp. 15189-15200 (2010)
http://dx.doi.org/10.1364/OE.18.015189


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Abstract

Grating couplers are an efficient means for fiber to chip coupling, as they require no facet preparation and enable wafer scale testing. While grating couplers are commonly used in silicon wire waveguides, their application to micrometric silicon-on-insulator rib waveguides is complicated due to the presence of high-order Bloch modes. We study the Bloch modes behavior and their excitation determined by access waveguide design. The latter is implemented to enable single Bloch mode excitation. The use of a design process based on modal analysis is proposed. A grating coupler is proposed in silicon-on-insulator with 1.5µm thick silicon layer that achieves a coupling efficiency of 65.6% at 1.55µm. The structure, including interconnection waveguides, access waveguide and grating can be fabricated using a single lithography step.

© 2010 Optical Society of America

OCIS Codes
(230.1950) Optical devices : Diffraction gratings
(230.3120) Optical devices : Integrated optics devices
(230.7390) Optical devices : Waveguides, planar

ToC Category:
Optical Devices

History
Original Manuscript: April 1, 2010
Revised Manuscript: May 16, 2010
Manuscript Accepted: May 19, 2010
Published: July 1, 2010

Citation
C. Alonso-Ramos, Alejandro Ortega-Moñux, I. Molina-Fernández, P. Cheben, L. Zavargo-Peche, and R. Halir, "Efficient fiber-to-chip grating coupler for micrometric SOI rib waveguides," Opt. Express 18, 15189-15200 (2010)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-18-14-15189


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