Title :
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
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;
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2014.2361432
