For dispersion compensation in optical transmission systems, an optical transversal filter is provided as filter negative dispersion, τ a number of each at a spacing / 2 successive operated as branching directional couplers and a set of likewise τ at intervals / 2 successive operated as a combiner directional couplers having wherein each of the second output of each directional coupler of the directional couplers operated as branching leads to the second input of each respective combiner is operated as a directional coupler.
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