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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 37, Iss. 3 — Feb. 1, 2012
  • pp: 365–367

Ultracompact polarization converter with a dual subwavelength trench built in a silicon-on-insulator waveguide

Aitor V. Velasco, María L. Calvo, Pavel Cheben, Alejandro Ortega-Moñux, Jens H. Schmid, Carlos Alonso Ramos, Íñigo Molina Fernandez, Jean Lapointe, Martin Vachon, Siegfried Janz, and Dan-Xia Xu  »View Author Affiliations


Optics Letters, Vol. 37, Issue 3, pp. 365-367 (2012)
http://dx.doi.org/10.1364/OL.37.000365


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Abstract

The design and fabrication of an ultracompact silicon-on-insulator polarization converter is reported. The polarization conversion with an extinction ratio of 16 dB is achieved for a conversion length of only 10 μm. Polarization rotation is achieved by inducing a vertical asymmetry by forming in the waveguide core two subwavelength trenches of different depths. By taking advantage of the calibrated reactive ion etch lag, the two depths are implemented using a single mask and etching process. The measured converter loss is 0.7dB and the 3 dB bandwidth is 26 nm.

© 2012 Optical Society of America

OCIS Codes
(130.3120) Integrated optics : Integrated optics devices
(230.7380) Optical devices : Waveguides, channeled
(130.5440) Integrated optics : Polarization-selective devices

ToC Category:
Integrated Optics

History
Original Manuscript: October 24, 2011
Revised Manuscript: December 1, 2011
Manuscript Accepted: December 5, 2011
Published: January 20, 2012

Citation
Aitor V. Velasco, María L. Calvo, Pavel Cheben, Alejandro Ortega-Moñux, Jens H. Schmid, Carlos Alonso Ramos, Íñigo Molina Fernandez, Jean Lapointe, Martin Vachon, Siegfried Janz, and Dan-Xia Xu, "Ultracompact polarization converter with a dual subwavelength trench built in a silicon-on-insulator waveguide," Opt. Lett. 37, 365-367 (2012)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-37-3-365

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