Optical Fiber Communication Systems

The ever increasing demand of information requires highly spectral efficient coherent optical systems with advanced modulation formats which allows the detection of in-phase and quadrature-phase components of both polarizations and doubles the available capacity and spectral efficiency but the optical signal is severely degraded by nonlinear impairments. Among numerous distortions, inter-channel interference and intra-channel interference in multi-user wavelength-division multiplexing is identified as the seemingly intractable factor limiting the achievable rate at high launch power. Since the deployment of optical communication systems, different fiber technologies have been used to deal with optical fiber impairments. In this paper, a survey on the fiber non-linearity compensation techniques has been summarized. We focus on the well-known Digital Back Propagation based Memory Polynomial techniques, their performances and implementation complexity.

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