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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 38, Iss. 1 — Jan. 1, 2013
  • pp: 4–6

Realization of an ultra-short silicon polarization beam splitter with an asymmetrical bent directional coupler

Jian Wang, Di Liang, Yongbo Tang, Daoxin Dai, and John E Bowers  »View Author Affiliations


Optics Letters, Vol. 38, Issue 1, pp. 4-6 (2013)
http://dx.doi.org/10.1364/OL.38.000004


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Abstract

An ultra-short (10μm long) polarization beam splitter (PBS) based on an asymmetrical bent directional coupler (DC) is demonstrated experimentally by using silicon-on-insulator nanowires. The bent DC is designed to cross-couple TM polarized light completely while there is almost no coupling for TE polarization. Grating couplers are introduced at both ends of the PBS for efficient coupling to single-mode fibers. The measurement results show that the extinction ratios of the fabricated ultra-short PBS are higher than 10 dB for both polarizations in a broad wavelength range. It is also shown that the present PBS has a large fabrication tolerance.

© 2012 Optical Society of America

OCIS Codes
(130.2790) Integrated optics : Guided waves
(230.5440) Optical devices : Polarization-selective devices
(230.7390) Optical devices : Waveguides, planar

ToC Category:
Integrated Optics

History
Original Manuscript: October 23, 2012
Revised Manuscript: November 30, 2012
Manuscript Accepted: November 30, 2012
Published: December 20, 2012

Citation
Jian Wang, Di Liang, Yongbo Tang, Daoxin Dai, and John E Bowers, "Realization of an ultra-short silicon polarization beam splitter with an asymmetrical bent directional coupler," Opt. Lett. 38, 4-6 (2013)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-38-1-4

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