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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 5 — Mar. 1, 2010
  • pp: 4275–4288

Compact optical 90° hybrid employing a tapered 2×4 MMI coupler serially connected by a 2×2 MMI coupler

Seok-Hwan Jeong and Ken Morito  »View Author Affiliations

Optics Express, Vol. 18, Issue 5, pp. 4275-4288 (2010)

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We propose a novel optical 90° hybrid employing a paired-interference-based tapered 2×4 multimode interference coupler and a 2×2 multimode interference coupler. It was experimentally shown that the proposed 90° hybrid has very short device length of less than 227 μm and is never accompanied by any waveguide intersections for coupling to balanced photodiodes. The proposed device exhibited quadrature phase response with a common-mode rejection ratio of more than 20dB and a phase deviation of less than 5° over C-band spectral range.

© 2010 OSA

OCIS Codes
(130.3120) Integrated optics : Integrated optics devices
(230.7370) Optical devices : Waveguides

ToC Category:
Integrated Optics

Original Manuscript: December 9, 2009
Revised Manuscript: December 24, 2009
Manuscript Accepted: December 30, 2009
Published: February 17, 2010

Seok-Hwan Jeong and Ken Morito, "Compact optical 90° hybrid employing a tapered 2×4 MMI coupler serially connected by a 2×2 MMI coupler," Opt. Express 18, 4275-4288 (2010)

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