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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 50, Iss. 14 — May. 10, 2011
  • pp: 2016–2023

Design and optimization of broadband and polarization-insensitive dual-core photonic crystal fiber coupler

Shuqin Lou, Zunwei Tang, and Liwen Wang  »View Author Affiliations


Applied Optics, Vol. 50, Issue 14, pp. 2016-2023 (2011)
http://dx.doi.org/10.1364/AO.50.002016


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Abstract

In this paper, we propose a novel (to our knowledge) broadband and polarization-insensitive dual-core photonic crystal fiber (PCF) coupler through the introduction of an elliptical-shaped central air hole to offset the slight birefringence arising from the dual core. With a full vectorial finite element method and anisotropic perfectly matched layers as the external boundaries, the impact of several fiber parameters on the coupling characteristics of dual-core PCF is investigated in detail. Through optimizing the main fiber parameters, including core diameter, size and ellipticity of the central air hole, and refractive index difference, broadband and polarization-insensitive characteristics are achieved in the wavelength range from 0.8 to 1.7 μm . The variation of the coupling ratio is stabilized at 50 ± 1 % , and the coupling ratio difference between x polarization and y polarization is less than 2% over the wavelength range. This dual-core PCF makes it easier to develop a 3 dB coupler over a wide wavelength for passive optical networks and large optical systems.

© 2011 Optical Society of America

OCIS Codes
(060.2280) Fiber optics and optical communications : Fiber design and fabrication
(060.2340) Fiber optics and optical communications : Fiber optics components
(060.5295) Fiber optics and optical communications : Photonic crystal fibers

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: December 14, 2010
Revised Manuscript: March 20, 2011
Manuscript Accepted: March 23, 2011
Published: May 4, 2011

Citation
Shuqin Lou, Zunwei Tang, and Liwen Wang, "Design and optimization of broadband and polarization-insensitive dual-core photonic crystal fiber coupler," Appl. Opt. 50, 2016-2023 (2011)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-50-14-2016

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