This article is cited in 2 papers

Fibre lasers

Evaluation of the capacity of communication lines with nonlinear finite memory

E. G. Shapiro^ab, D. A. Shapiro<sup>ab

a</sup> Novosibirsk State University
^b Institute of Automation and Electrometry, Siberian Branch of Russian Academy of Sciences, Novosibirsk

Abstract: We propose a method for calculating the capacity of a finite-memory channel up to the square of the nonlinear memory parameter. A comparison with a regular Gaussian model is performed, in which the Kerr nonlinearity is considered as an additional Gaussian noise. The estimate by the regular Gaussian model is shown to yield a greater capacity as compared with the estimate obtained by the nonlinear memory model. The optimal signal powers, providing the maximum mutual information, are found to be equal.

Keywords: fibre-optic communication lines, capacity, nonlinear noise, Shannon limit.

Received: 30.09.2016
Revised: 21.10.2016

 English version: Quantum Electronics, 2016, 46:12, 1117–1120

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