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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 48, Iss. 15 — May. 20, 2009
  • pp: 2821–2835

How small can a microring resonator be and yet be polarization independent?

Thomas Yong Long Ang, Soon Thor Lim, Shuh Ying Lee, Ching Eng Png, and Mee Koy Chin  »View Author Affiliations


Applied Optics, Vol. 48, Issue 15, pp. 2821-2835 (2009)
http://dx.doi.org/10.1364/AO.48.002821


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Abstract

There has been a recent trend to reduce the size of photonic waveguide devices to enable high-density integration in silicon photonic integrated circuits. However, this miniaturization tends to result in increased polarization dependency. Particularly challenging is designing devices based on ring waveguides with small radii, which exacerbates the polarization sensitivity. For these microring resonators, a legitimate question is then: Is it possible to simultaneously maintain the conditions of single-mode and structural polarization independence while shrinking the size of both the bend radius and the waveguide cross section, and, if so, how small can the ring resonator be? We demonstrate theoretically the feasibility of achieving this via deeply etched submicrometer silicon-on-insulator rib waveguides, and we show that, for a given cladding and core thickness, the radius of a polarization independent microring resonator can be as small as 3 μm , being limited chiefly by the residual birefringence of the resonator cavity and the bend losses.

© 2009 Optical Society of America

OCIS Codes
(130.0130) Integrated optics : Integrated optics
(230.5750) Optical devices : Resonators
(250.5300) Optoelectronics : Photonic integrated circuits

ToC Category:
Integrated Optics

History
Original Manuscript: November 18, 2008
Revised Manuscript: March 6, 2009
Manuscript Accepted: April 7, 2009
Published: May 11, 2009

Citation
Thomas Yong Long Ang, Soon Thor Lim, Shuh Ying Lee, Ching Eng Png, and Mee Koy Chin, "How small can a microring resonator be and yet be polarization independent?," Appl. Opt. 48, 2821-2835 (2009)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-48-15-2821

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