Fibreoptic communication

Nonlinear effects in optical signal transmission using a multimode fibre with weak coupling

O. S. Sidelnikov^ab, A. A. Redyuk<sup>ab

a</sup> Institute of Computational Technologies, Siberian Branch of the Russian Academy of Sciences, Novosibirsk
^b Novosibirsk State University

Abstract: We present the results of numerical simulation of nonlinear propagation of an optical signal in multimode gradient- and step-index fibres with weak coupling. It is found that when signals propagate in different modes, the system quality factor (Q-factor) for a gradient-index fibre increases with the number of the modes involved. The quality degradation of the transmitted data with increasing the number of the involved modes is demonstrated for the case when the signals in different modes travel at the same velocity. It is shown that the use of a step-index fibre may significantly deteriorate the signal quality due to the presence of a mode with a small dispersion parameter.

Keywords: multimode optical fibre, nonlinear effects, weak-coupling regime, numerical simulation.

Received: 23.11.2016
Revised: 06.02.2017

 English version: Quantum Electronics, 2017, 47:4, 330–334

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