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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 22, Iss. 9 — May. 5, 2014
  • pp: 10815–10824

A non-orthogonal coupled mode theory for super-modes inside multi-core fibers

Junhe Zhou  »View Author Affiliations

Optics Express, Vol. 22, Issue 9, pp. 10815-10824 (2014)

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In this paper, a non-orthogonal coupled mode theory is proposed to analyze the super-modes of multi-core fibers (MCFs). The theory is valid in the strong coupling regime and can provide accurate analytical formulas for the super-modes inside MCFs. MCFs with circularly distributed cores are analyzed as an example. Analytical formulas are derived both for the refractive indexes and the eigen vectors of the super-modes. It is rigorously revealed that the eigen vectors for the super-modes of such MCFs are the row vectors of the inverse discrete Fourier transform (IDFT) matrix. Therefore, by pre-coding the signal channels via IDFT, one is able to generate the super-modes for the MCFs with circularly distributed cores.

© 2014 Optical Society of America

OCIS Codes
(060.0060) Fiber optics and optical communications : Fiber optics and optical communications
(060.4005) Fiber optics and optical communications : Microstructured fibers

ToC Category:
Fiber Optics

Original Manuscript: March 3, 2014
Revised Manuscript: April 21, 2014
Manuscript Accepted: April 22, 2014
Published: April 28, 2014

Junhe Zhou, "A non-orthogonal coupled mode theory for super-modes inside multi-core fibers," Opt. Express 22, 10815-10824 (2014)

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