In this paper, we present the design, fabrication, and characterization of a highly integrated optical 4\,×\,4 crossbar based on microring resonator add-drop filters. The designed crossbar structure, as small as50\,μm×50\,μm, has been fabricated in CMOS compatible silicon on insulator technology. Finally, experimental results proving the proper operation of the fabricated crossbar structures are discussed.
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Kaźmierczak et al. (2009) studied this question.
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