Higher order modes of coupled optical fibres

The structure of hybrid higher order modes of two coupled weakly guiding identical optical fibres is studied. On the basis of perturbation theory with degeneracy for the vector wave equation expressions for modes with azimuthal angular number l >= 1 are obtained that allow for the spin--orbit int...

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Bibliographic Details
Published in:Journal of optics (2010) 2010-11, Vol.12 (11), p.115704-115704
Main Authors: Alexeyev, C N, Boklag, N A, Yavorsky, M A
Format: Article
Language:English
Subjects:
Applied sciences
Circuit properties
Constants
Constraining
Electric, optical and optoelectronic circuits
Electronics
Exact sciences and technology
Fibers
Fibres
Fundamental areas of phenomenology (including applications)
Integrated optics. Optical fibers and wave guides
Mathematical analysis
Optical and optoelectronic circuits
Optical fibers
Optics
Physics
Scalars
Spectra
Wave optics
Wave propagation, transmission and absorption
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Summary:The structure of hybrid higher order modes of two coupled weakly guiding identical optical fibres is studied. On the basis of perturbation theory with degeneracy for the vector wave equation expressions for modes with azimuthal angular number l >= 1 are obtained that allow for the spin--orbit interaction. The spectra of polarization corrections to the scalar propagation constants are calculated in a wide range of distances between the fibres. The limiting cases of widely and closely spaced fibres are studied. The obtained results can be used for studying the tunnelling of optical vortices in directional couplers and in matters concerned with information security.
ISSN:2040-8986
2040-8978
2040-8986
DOI:10.1088/2040-8978/12/11/115704