TITLE:
Vortex Field Propagation in a Hexagonal Multicore Fiber Array
AUTHORS:
Muhammad A. Mushref
KEYWORDS:
Optical Vortex; Beam Propagation Method; Transparent Boundary Conditions; Multicore Fibers; Optical Interferogram
JOURNAL NAME:
Optics and Photonics Journal,
Vol.4 No.1,
January
21,
2014
ABSTRACT:
The propagation of an optical vortex in a hexagonally
arranged single mode multicore fiber structure is investigated for possible
generation of additional vortices and their spread dynamics. Fields are
separated into a slowly varying paraxial envelope and a rapidly changing exponential
component. Solutions are derived from the paraxial inhomogeneous Schrodinger
equation in two dimensions along with the index of refraction of the proposed
structure. Numerical analyses are based on the beam propagation method and
transparent boundary conditions in matrix form with different parameters to
represent the intensity and phase of all derived fields. Vortices are
numerically identified by their points of zero intensity and their phase change
or polarity. The optical interferogram with a plane wave reference is also
employed to distinguish the dislocation points in the transverse directions of
the propagating fields.