A Discrete-Time Model for Uncompensated Single-Channel Fiber-Optical Links
Journal article, 2012

An analytical discrete-time model is introduced for single-wavelength polarization multiplexed nonlinear fiber-optical channels based on the symmetrized split-step Fourier method (SSFM). According to this model, for high enough symbol rates, a fiber-optic link can be described as a linear dispersive channel with additive white Gaussian noise (AWGN) and a complex scaling. The variance of this AWGN noise and the attenuation are computed analytically as a function of input power and channel parameters. The results illustrate a cubic growth of the noise variance with input power. Moreover, the cross effect between the two polarizations and the interaction of amplifier noise and the transmitted signal due to the nonlinear Kerr effect are described. In particular, it is found that the channel noise variance in one polarization is affected twice as much by the transmitted power in that polarization than by the transmitted power in the orthogonal polarization. The effect of pulse shaping is also investigated through numerical simulations. Finally, it is shown that the analytical performance results based on the new model are in close agreement with numerical results obtained using the SSFM for a symbol rate of 28 Gbaud and above.

Symmetrized split-step Fourier method (SSFM)

Nonlinear fiber-optic channels

Chromatic dispersion

Nonlinear Schrödinger equation

Channel modeling

Nonlinear phase-noise

Author

Lotfollah Beygi

Chalmers, Signals and Systems, Kommunikationssystem, informationsteori och antenner, Communication Systems

Erik Agrell

Chalmers, Signals and Systems, Kommunikationssystem, informationsteori och antenner, Communication Systems

Pontus Johannisson

Chalmers, Microtechnology and Nanoscience (MC2), Photonics

Magnus Karlsson

Chalmers, Microtechnology and Nanoscience (MC2), Photonics

Henk Wymeersch

Chalmers, Signals and Systems, Kommunikationssystem, informationsteori och antenner, Communication Systems

IEEE Transactions on Communications

0090-6778 (ISSN)

Vol. 60 11 3440-3450 6276216

Areas of Advance

Information and Communication Technology

Subject Categories

Telecommunications

DOI

10.1109/TCOMM.2012.081412.110781

More information

Latest update

3/29/2018