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Modeling of the Impact of Nonlinear Propagation Effects in Uncompensated Optical Coherent Transmission Links

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5 Author(s)
Carena, A. ; Dipt. di Elettron. e Telecomun., Politec. di Torino, Torino, Italy ; Curri, V. ; Bosco, G. ; Poggiolini, P.
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We address perturbative models for the impact of nonlinear propagation in uncompensated links. We concentrate on a recently-proposed model which splits up the signal into spectral components and then resorts to a four-wave-mixing-like approach to assess the generation of nonlinear interference due to the beating of the signal spectral components. We put its founding assumptions on firmer ground and we provide a detailed derivation for its main analytical results. We then carry out an extensive simulative validation by addressing an ample and significant set of formats encompassing PM-BPSK, PM-QPSK, PM-8QAM, and PM-16QAM, all operating at 32 GBaud. We compare the model prediction of maximum system reach and optimum launch power versus simulation results, for all four formats, three different kinds of fibers (PSCF, SMF, and NZDSF) and for several values of WDM channel spacing, ranging from 50 GHz down to the symbol-rate. We found that, throughout all tests, the model delivers accurate predictions, potentially making it an effective general-purpose system design tool for coherent uncompensated transmission systems.

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Lightwave Technology, Journal of  (Volume:30 ,  Issue: 10 )