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This paper deals with the research proposal and evaluation of a novel optical mode multiplexer/demultiplexer. It is based on angled-multimode interference (a-MMI) waveguide for realizing compact size,... low loss and high integrated mode multiplexer/demultiplexer. Previously, the optical mode demultiplexer which was based on a-MMI waveguide showed the possibility of multiplexing the fundamental and first order modes. However, the mode-crosstalk between the fundamental and first order modes are not sufficient, that is due to the insufficient focal point shift between the fundamental and first order modes for the transmission system. The proposed approach is using another type which is based on Rowland circular geometry and it has been investigated comprehensively. The principle has also been confirmed for mode multiplexing/demultiplexing process for mode division multiplexing (MDM) transmission system.show more
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