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Applied Optics

Applied Optics


  • Editor: James C. Wyant
  • Vol. 47, Iss. 14 — May. 10, 2008
  • pp: 2687–2695

Design of polarization-independent optical couplers composed of three parallel slot waveguides

Jinbiao Xiao, Xu Liu, and Xiaohan Sun  »View Author Affiliations

Applied Optics, Vol. 47, Issue 14, pp. 2687-2695 (2008)

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The characteristics of directional couplers and power splitters based on three-guide optical couplers in slot waveguide structures are analyzed in detail by a three-dimensional full-vectorial beam propagation method. The numerical results show the achievement of a compact three-guide directional coupler operating as polarization independent with a length of 58.0 μm and having almost evenly spaced propagation constants of the three lowest order modes for quasi-TE and quasi-TM modes. Thus, a high coupling efficiency from one outside waveguide to the other outside waveguide is demonstrated and is over 99.5% for both polarization states. For a three-guide power splitter, multiple sets of waveguide parameters for achieving polarization-independent operation are presented. Tolerances to operating wavelength and structural parameters are also analyzed, and the evolution of the injected field along the propagation distance through the proposed devices is demonstrated.

© 2008 Optical Society of America

OCIS Codes
(130.2790) Integrated optics : Guided waves
(130.3120) Integrated optics : Integrated optics devices
(230.7380) Optical devices : Waveguides, channeled
(250.5300) Optoelectronics : Photonic integrated circuits

ToC Category:
Integrated Optics

Original Manuscript: December 10, 2007
Revised Manuscript: March 21, 2008
Manuscript Accepted: April 1, 2008
Published: May 7, 2008

Jinbiao Xiao, Xu Liu, and Xiaohan Sun, "Design of polarization-independent optical couplers composed of three parallel slot waveguides," Appl. Opt. 47, 2687-2695 (2008)

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