Broadband mode switch based on a three-dimensional waveguide Mach–Zehnder interferometer

Quandong Huang, Wei Jin, Kin Seng Chiang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

37 Citations (Scopus)


We propose a mode switch that operates on modulating the optical phases of a three-dimensional balanced four-arm waveguide Mach–Zehnder interferometer. We design and fabricate the device with polymer material to achieve thermo-optic switching between any two of the E11, E21, E12, and E22modes of the waveguide. Our experimental device shows an extinction ratio higher than 14 dB and a switching time shorter than 3.7 ms, measured with the E11mode switched to any of the other modes at 1550 nm. This mode switch can operate over a wide range of wavelengths with weak polarization dependence and could be used in reconfigurable fiber-based mode-division-multiplexing systems where mode routing is required.
Original languageEnglish
Pages (from-to)4877-4880
Number of pages4
JournalOptics Letters
Issue number23
Publication statusPublished - 1 Dec 2017
Externally publishedYes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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