Abstract
In long-haul dense wavelength-division multiplexing (DWDM) systems with
periodic dispersion compensation and amplification, system performance is
adversely affected by severe physical impairments due to fiber losses, dispersion
and nonlinearity. Fiber modeling is a prerequisite for the development of
physical impairment mitigation techniques to improve system performance. The
distance between two interacting symbols in time and wavelength, i.e., the
range of influence (RoI) of each physical impairment, plays an important role
in the development of these mitigation techniques. In this paper, we use the
Volterra series transfer function (VSTF) method to define impairment characteristic
coefficients that capture intersymbol interference (ISI), self phase modulation
(SPM), intrachannel cross phase modulation (IXPM), intrachannel four wave
mixing (IFWM), cross phase modulation (XPM) and four wave mixing (FWM), to
characterize the impact of these impairments individually on the system output.
We then investigate the impact of system parameters, namely, duty cycle, spectral
efficiency, frequency chirp, and span length, on the RoI for long-haul DWDM
systems.
© 2012 IEEE
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