Study on tapered multimode interference-based coherent lightwave combiners

W. U. Zhigang, Katsuyuki Utaka

    Research output: Contribution to journalArticle

    5 Citations (Scopus)

    Abstract

    In this paper we analyze the characteristics of tapered multimode interference (MMI)-based coherent lightwave combiners, and theoretically confirm that the stable and clear multimode interference images exist in the tapered MMI combiners. We present the output characteristics of 2 × 1 tapered MMI-based coherent lightwave combiners under various structures, which are useful to optimally design the combiners. In order to extend the combiner to a multi-port (N × l, N > 2) configuration, a new structure with the border shapes of two tangent arcs is proposed, by which we show an output power imbalance of about 0.5 dB between different input ports of an 8 × 1 tapered coherent lightwave combiner. Due to the advantages of no end-facet reflection, easy extension to a multi-port configuration, high tolerance for fabrication errors and a compact size, the tapered MMI structure is a good candidate as a coherent lightwave combiner used in large-scale photonic integrated circuits.

    Original languageEnglish
    Pages (from-to)1005-1011
    Number of pages7
    JournalIEICE Transactions on Electronics
    VolumeE88-C
    Issue number5
    DOIs
    Publication statusPublished - 2005

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    Photonics
    Integrated circuits
    Fabrication

    Keywords

    • End-facet reflection
    • MMI
    • Multi-port combiner
    • Taper

    ASJC Scopus subject areas

    • Electrical and Electronic Engineering

    Cite this

    Study on tapered multimode interference-based coherent lightwave combiners. / Zhigang, W. U.; Utaka, Katsuyuki.

    In: IEICE Transactions on Electronics, Vol. E88-C, No. 5, 2005, p. 1005-1011.

    Research output: Contribution to journalArticle

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