Coupled modes of anisotropic polarization maintaining fibers

Author

Shafir, Ehud ; Hardy, Amos ; Tur, Moshe

Author_Institution

Soreq Nucl. Res. Center, Yavne, Israel

Volume

6

Issue

1

fYear

1988

fDate

1/1/1988 12:00:00 AM

Firstpage

58

Lastpage

63

Abstract

Wave coupling between the fundamental vector modal fields of two identical, polarization-maintaining, weakly guiding fibers is analyzed. An improved coupled-mode theory is used that also applies to anisotropic materials. Coupling coefficients that are the elements of a coupling matrix are calculated and presented as functions of the relative tilt angle between the two fiber principal axes. Exact analytical expressions for the eigenvalues and their associated eigenvectors are given in terms of the elements of this coupling matrix, for any relative tilt angle. Symmetry relations that are found between elements of the coupling matrix much simplify the presentation of the eigenvectors. A weak-coupling approximation of the eigenvector expressions, which is also given, retains their qualitative properties

Keywords

eigenvalues and eigenfunctions; matrix algebra; optical couplers; optical fibres; anisotropic materials; anisotropic polarization maintaining fibers; coupled modes; coupled-mode theory; coupling matrix; eigenvalues; eigenvectors; fiber principal axes; fundamental vector modal fields; relative tilt angle; symmetry relations; wave coupling; weak-coupling approximation; Anisotropic magnetoresistance; Directional couplers; Eigenvalues and eigenfunctions; Optical attenuators; Optical fiber communication; Optical fiber couplers; Optical fiber devices; Optical fiber polarization; Optical fiber theory; Optical propagation; Waveguide theory;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/50.3964

Filename

3964