Vector Mode Analysis of Ring-Core Fibers: Design Tools for Spatial Division Multiplexing

Author

Brunet, Charles ; Ung, Bora ; Belanger, Pierre-Andre ; Messaddeq, Younes ; LaRochelle, Sophie ; Rusch, Leslie A.

Author_Institution

Dept. of Electr. & Comput. Eng., Univ. Laval, Quebec City, QC, Canada

Volume

32

Issue

23

fYear

2014

fDate

Dec.1, 1 2014

Firstpage

4648

Lastpage

4659

Abstract

Design tools have existed for decades for standard step-index fibers, with analytical expressions for cutoff conditions as a function of core size, refractive indexes, and wavelength. We present analytical expressions for cutoff conditions for fibers with a ring-shaped propagation region. We validate our analytical expressions against numerical solutions, as well as via asymptotic analysis yielding the existing solutions for standard step-index fiber. We demonstrate the utility of our solutions for optimizing fibers supporting specific eigenmode behaviors of interest for spatial division multiplexing. In particular, we address large mode separation for orbital angular momentum modes and fibers supporting only modes with a single intensity ring.

Keywords

eigenvalues and eigenfunctions; optical design techniques; optical fibres; refractive index; space division multiplexing; core size; cutoff conditions; design tools; eigenmode behaviors; large mode separation; orbital angular momentum modes; refractive indexes; ring-core fibers; ring-shaped propagation region; single intensity ring; spatial division multiplexing; standard step-index fibers; vector mode analysis; Cutoff frequency; Equations; Indexes; Mathematical model; Propagation constant; Standards; Vectors; Multiplexing; optical design; optical fibers;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/JLT.2014.2361432

Filename

6915667