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Journal of the Optical Society of America A

Journal of the Optical Society of America A

| OPTICS, IMAGE SCIENCE, AND VISION

  • Vol. 22, Iss. 4 — Apr. 1, 2005
  • pp: 716–723

Propagation and coupling of hybrid modes in twisted fibers

Oleg V. Ivanov  »View Author Affiliations


JOSA A, Vol. 22, Issue 4, pp. 716-723 (2005)
http://dx.doi.org/10.1364/JOSAA.22.000716


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Abstract

The first-order paraxial approximation is used to obtain the distributions of the electric and magnetic fields for the core and cladding hybrid fiber modes. The coupling coefficients of these modes are found for fibers subject to twist. The longitudinal electric field component determines the mode coupling in twisted fibers. It is shown that in the first-order paraxial approximation the cladding hybrid modes propagating in a twisted fiber rotate along the direction of the twist at the same rate as the core mode, independently of the azimuthal and radial mode numbers. Four hybrid modes constituting one linearly polarized mode have different longitudinal components, and the corresponding cladding-mode resonances of a long-period fiber grating undergo different shifts owing to different mode self-coupling coefficients. This results in the removal of mode degeneracy and splitting of resonances of long-period gratings in twisted fibers.

© 2005 Optical Society of America

OCIS Codes
(060.2310) Fiber optics and optical communications : Fiber optics
(060.2340) Fiber optics and optical communications : Fiber optics components
(060.2370) Fiber optics and optical communications : Fiber optics sensors

History
Original Manuscript: May 21, 2004
Revised Manuscript: October 6, 2004
Manuscript Accepted: October 6, 2004
Published: April 1, 2005

Citation
Oleg V. Ivanov, "Propagation and coupling of hybrid modes in twisted fibers," J. Opt. Soc. Am. A 22, 716-723 (2005)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-22-4-716

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