Nonlinear inverse synthesis for high spectral efficiency transmission in optical fibers

Le, Son Thai, Prilepsky, Jaroslaw E. and Turitsyn, Sergei K. (2014). Nonlinear inverse synthesis for high spectral efficiency transmission in optical fibers. Optics Express, 22 (22), pp. 26720-26741.

Abstract

In linear communication channels, spectral components (modes) defined by the Fourier transform of the signal propagate without interactions with each other. In certain nonlinear channels, such as the one modelled by the classical nonlinear Schrödinger equation, there are nonlinear modes (nonlinear signal spectrum) that also propagate without interacting with each other and without corresponding nonlinear cross talk, effectively, in a linear manner. Here, we describe in a constructive way how to introduce such nonlinear modes for a given input signal. We investigate the performance of the nonlinear inverse synthesis (NIS) method, in which the information is encoded directly onto the continuous part of the nonlinear signal spectrum. This transmission technique, combined with the appropriate distributed Raman amplification, can provide an effective eigenvalue division multiplexing with high spectral efficiency, thanks to highly suppressed channel cross talk. The proposed NIS approach can be integrated with any modulation formats. Here, we demonstrate numerically the feasibility of merging the NIS technique in a burst mode with high spectral efficiency methods, such as orthogonal frequency division multiplexing and Nyquist pulse shaping with advanced modulation formats (e.g., QPSK, 16QAM, and 64QAM), showing a performance improvement up to 4.5 dB, which is comparable to results achievable with multi-step per span digital back propagation.

Publication DOI: https://doi.org/10.1364/OE.22.026720
Divisions: Engineering & Applied Sciences > Electrical, electronic & power engineering
Engineering & Applied Sciences > Mathematics
Engineering & Applied Sciences > Systems analytics research institute (SARI)
Engineering & Applied Sciences > Institute of Photonics
Additional Information: Funding: UK EPSRC programme Grant UNLOC (EP/J017582/1)
Uncontrolled Keywords: Atomic and Molecular Physics, and Optics
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Related URLs: http://www.scopus.com/inward/record.url?scp=84920019683&partnerID=8YFLogxK (Scopus URL)
Published Date: 2014-10-21
Authors: Le, Son Thai ( 0000-0002-3824-9456)
Prilepsky, Jaroslaw E.
Turitsyn, Sergei K. ( 0000-0003-0101-3834)

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