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The mode-conversion characteristics of a few-mode optical waveguide based on adiabatic mode evolution are investigated. The mode-conversion efficiency and cross talks of the configuration are found dependent on the position and angle between the assistant waveguide and the main waveguide, and also the size of the assistant waveguide. By setting the bottoms of the two waveguides at the same plane,...
Mode conversion based on adiabatical mode evolution in a two-core configuration is proposed. The mode conversion feature is only dependent on the relationship between the effective mode indexes of the two cores in the configuration, which shows the highly flexible characteristics of the configuration and large fabrication tolerance. A mode wide bandwidth multiplexer/demultiplexer which is achieved...
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