Vector modes of six-port couplers

10 September 1987

journal article
Published by Institution of Engineering and Technology (IET) in Electronics Letters

Vol. 23 (19) , 1011-1013
https://doi.org/10.1049/el:19870709

Abstract

The polarisation patterns for the first six vector modes of six-port couplers with either ideal equilateral or nonideal isosceles cross-sections are determined using formal perturbation theory. They are shown to bear a close similarity with the corresponding modal patterns of a circularly symmetric fibre or an elliptical fibre, respectively.

Keywords

SIX-PORT FIBRE COUPLER
NONIDEAL ISOSCELES CROSS-SECTIONS
FORMAL PERTURBATION THEORY
POLARISATION PATTERNS
EVANESCENT COUPLING
FIRST SIX VECTOR MODES
EQUILATERAL TRIANGLE
SCALAR MODES
UNBOUNDED CLADDING

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