Acceptable values for filter bandwidth and amplifier output power are determined by means of numerical simulations under the criteria of tolerable maximum standard deviation of timing jitters and minimum Q factor for fixed and sliding-frequency in-line filters. The results, for chromatic dispersion values usually encountered in published experiments, represented by isojitters and iso-Q factors clearly show the existence of an optimum design area. From these diagrams, the optimum bandwidth can be obtained for the largest power margin. We also analyze power margins with increasing sliding rates of in-line filters. In our simulations we obtain a 1.5-dB power margin with fixed filters and a 3-dB power margin with sliding filters.
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