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This paper proposes and simulates a novel structure for optical demultiplexing of optical multiple-input-multiple-output (MIMO) systems. Such a structure obviates the need for electronic digital signal processing in low-dispersion links, potentially saving significant power consumption. It has the minimum number of required analog control elements for nonunitary MIMO demultiplexing.
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C.R. Doerr (2011) studied this question.
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