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The use of infinite impulse response filtering for back-propagation of an optical signal is investigated. Experimental results and a comparison between several compensation techniques show the feasibility of this approach.
Digital distributed impairment postcompensation for dispersion and nonlinear effects using backward propagation is demonstrated in a wavelength-division-multiplexing environment for the first time. The experimental results clearly show the benefit of employing distributed postcompensation, compared to dispersion compensation only or lumped dispersion and nonlinearity compensation.
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