Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Polarization-independent grating coupler for micrometric silicon rib waveguides

Not Accessible

Your library or personal account may give you access

Abstract

Grating couplers are a promising approach to implement efficient fiber–chip coupling. However, their strong polarization dependence makes dual-polarization operation challenging. In this Letter we propose, for the first time, a polarization-independent grating coupler for thick rib silicon-on-insulator (SOI) waveguides. Coupling efficiency is optimized by designing the grating pitch and duty cycle, without varying the bottom oxide thickness, which significantly simplifies practical implementation. Directivity of the grating coupler is enhanced by a high reflectivity layer under the bottom oxide after the selective removal of the Si substrate. Dual-polarization coupling efficiency of 2.8dB is shown.

© 2012 Optical Society of America

Full Article  |  PDF Article
More Like This
Single-etch grating coupler for micrometric silicon rib waveguides

C. Alonso-Ramos, A. Ortega-Moñux, L. Zavargo-Peche, R. Halir, J. de Oliva-Rubio, I. Molina-Fernández, P. Cheben, D.-X. Xu, S. Janz, N. Kim, and B. Lamontagne
Opt. Lett. 36(14) 2647-2649 (2011)

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
Opt. Express 18(14) 15189-15200 (2010)

Polarization-independent grating couplers for silicon-on-insulator nanophotonic waveguides

Xia Chen and Hon K. Tsang
Opt. Lett. 36(6) 796-798 (2011)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (4)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (2)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved