Ultra-broadband mode multiplexers based on three-dimensional asymmetric waveguide branches

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Original languageEnglish
Pages (from-to)407-410
Journal / PublicationOptics Letters
Issue number3
Publication statusPublished - 1 Feb 2017



We propose a three-dimensional waveguide mode multiplexer structure that operates on the principle of adiabatic mode transition along multilayer asymmetric waveguide branches. Using this structure, we designed and fabricated a three-mode and a four-mode multiplexer with polymer material that can operate over the C + L band and beyond with small modal crosstalk (<- 10 dB) and negligible polarization dependence and be directly connected to fibers with low loss. These multiplexers could be used as mode-selective devices for ultra-broadband mode-division multiplexing based on few-mode fibers.

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