Authors:
Ricardo O. J. Soeiro
1
;
Tiago M. F. Alves
1
and
Adolfo V. T. Cartaxo
2
Affiliations:
1
Instituto de Telecomunicações, Portugal
;
2
Instituto de Telecomunicações and ISCTE - Instituto Universit´ario de Lisboa, Portugal
Keyword(s):
Coupled Local Mode Theory, Discrete Changes Model, Dual-polarization, Homogeneous Multi-core Fibers, Inter-core Crosstalk.
Related
Ontology
Subjects/Areas/Topics:
Optical Communications and Networking
;
Optics
;
Photonics, Optics and Laser Technology
Abstract:
In this paper, the inter-core crosstalk (ICXT) of the polarization directions and the probability density functions
(PDFs) of the ICXT power of the polarization directions in weakly coupled birefringent homogeneous
multi-core fibers (MCFs) are studied through numerical simulation. The numerical simulator is based on the
coupled local mode theory (CLMT), which is a rigorous model that has the downside of requiring long computational
times to compute the ICXT field and PDFs of the ICXT power. Conversely, a dual-polarization
discrete changes model (DP-DCM) that allows for much faster estimates of the ICXT field is presented. It is
shown that, for perfectly homogeneous MCFs, the mean ICXT power distribution between the polarization directions
is similar, despite the power distribution at the MCF input, for a mean linear birefringence parameter
ranging from 107 (low birefringence) to 104 (high birefringence), and for different MCF bending radii. It
is also shown that the mean ICXT pow
er estimates obtained with the CLMT and DP-DCM are very similar.
Furthermore, using the CLMT, the PDFs of the ICXT power of the polarization directions are shown to be
chi-squared distributions with two degrees of freedom, and the PDF of the sum of the ICXT power of the
polarizations is shown to follow a chi-squared distribution with four degrees of freedom.
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