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Applied Optics

Applied Optics


  • Editor: Joseph N. Mait
  • Vol. 48, Iss. 2 — Jan. 10, 2009
  • pp: 206–211

Parabolic tapered structure for an ultracompact multimode interference coupler

P. P. Sahu  »View Author Affiliations

Applied Optics, Vol. 48, Issue 2, pp. 206-211 (2009)

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A parabolic tapered structure based on general interference has been proposed and studied theoretically with silica waveguides of silicon oxinitride (SiON) core by using a mathematical model based on sinusoidal modes for the reduction of coupling length of a 2 × 2 multimode interference (MMI) coupler. The coupling behaviors of the proposed structure are compared with those of other MMI structures. It is seen that the beat length for the proposed tapered MMI coupler is approximately half of that of a conventional MMI coupler. The effect of power imbalance on the fabrication tolerance of a 3 dB coupler using the proposed tapered structure is also studied and compared with that of other MMI structures.

© 2009 Optical Society of America

OCIS Codes
(130.2790) Integrated optics : Guided waves
(130.3120) Integrated optics : Integrated optics devices

ToC Category:
Integrated Optics

Original Manuscript: July 15, 2008
Revised Manuscript: November 9, 2008
Manuscript Accepted: November 12, 2008
Published: January 7, 2009

P. P. Sahu, "Parabolic tapered structure for an ultracompact multimode interference coupler," Appl. Opt. 48, 206-211 (2009)

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