Abstract
This chapter presents an overview of modeling and mitigation of nonlinear effects on coherent optical systems. The Gaussian Noise (GN) is presented as an efficient method to analyze the nonlinear propagation in an uncompensated link and used to estimate the system performance. In order to compensate for the nonlinear impairments, four digital techniques were investigated: Digital Back-Propagation (DBP), DBP with coupled equations, Volterra series, and Maximum Likelihood Sequence Estimator (MLSE). Different scenarios were used to validate the algorithms. Finally, a nonlinear estimation algorithm based on Steepest Descent Algorithm (SDA) is shown and experimentally validated in an unrepeatered optical system.
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Notes
- 1.
Nevertheless, the inverse VSTF can also be easily generalized to any other heterogeneous optical fiber link.
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The authors thank Dr. Miquel Garrich Alabarce for reviewing a draft of this chapter.
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Ranzini, S.M., Parahyba, V.E., Júnior, J.H.d.C., Guiomar, F., Carena, A. (2019). Impact of Nonlinear Effects and Mitigation on Coherent Optical Systems. In: Paradisi, A., Carvalho Figueiredo, R., Chiuchiarelli, A., de Souza Rosa, E. (eds) Optical Communications. Telecommunications and Information Technology. Springer, Cham. https://doi.org/10.1007/978-3-319-97187-2_5
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