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Opt Express. 2008 Sep 29;16(20):16124-37.

Impact of XPM and FWM on the digital implementation of impairment compensation for WDM transmission using backward propagation.

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  • 1CREOL: The College of Optics and Photonics, University of Central Florida, 4000 Central Florida Blvd, Orlando, Florida 32816, USA.


The impact of cross-phase modulation (XPM) and four-wave mixing (FWM) on electronic impairment compensation via backward propagation is analyzed. XPM and XPM+FWM compensation are compared by solving, respectively, the backward coupled Nonlinear Schrödinger Equation (NLSE) system and the total-field NLSE. The DSP implementations as well as the computational requirements are evaluated for each post-compensation system. A 12 x 100 Gb/s 16-QAM transmission system has been used to evaluate the efficiency of both approaches. The results show that XPM post-compensation removes most of the relevant source of nonlinear distortion. While DSP implementation of the total-field NLSE can ultimately lead to more precise compensation, DSP implementation sing the coupled NLSE system can maintain high accuracy with better computation efficiency and low system latency.

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