Soliton content in the standard optical OFDM signal

Abstract

The nonlinear Schrödinger equation (NLSE) is often used as a master path-average model for fiber-optic transmission lines. In general, the NLSE describes the co-existence of dispersive waves and soliton pulses. The propagation of a signal in such a nonlinear channel is conceptually different from linear systems. We demonstrate here that the conventional orthogonal frequency-division multiplexing (OFDM) input optical signal at powers typical for modern communication systems might have soliton components statistically created by the random process corresponding to the information content. Applying the Zakharov–Shabat spectral problem to a single OFDM symbol with multiple subcarriers, we quantify the effect of the statistical soliton occurrence in such an information-bearing optical signal. Moreover, we observe that at signal powers optimal for transmission, an OFDM symbol incorporates multiple solitons with high probability. The considered optical communication example is relevant to a more general physical problem of the generation of coherent structures from noise.

Publication DOI: https://doi.org/10.1364/OL.43.005985
Divisions: College of Engineering & Physical Sciences > Aston Institute of Photonics Technology (AIPT)
College of Engineering & Physical Sciences > Systems analytics research institute (SARI)
Additional Information: This paper was published in Optics Letters and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: https://doi.org/10.1364/OL.43.005985. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.
Publication ISSN: 1539-4794
Last Modified: 26 Feb 2024 08:27
Date Deposited: 07 Jan 2019 09:39
Full Text Link:
Related URLs: https://www.osa ... I=ol-43-24-5985 (Publisher URL)
PURE Output Type: Article
Published Date: 2018-12-15
Accepted Date: 2018-11-11
Authors: Sedov, Egor V.
Redyuk, Alexey A.
Fedoruk, Mikhail P.
Gelash, Andrey A.
Frumin, Leonid L.
Turitsyn, Sergei K. (ORCID Profile 0000-0003-0101-3834)

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