Relaxed fabrication tolerance for self-imaging photonic crystal waveguide splitters using a tapered multimode interference region

M. Zhang, A.C. Krüger, N. Groothoff, T. Balle, M. Kristensen

    Research output: Contribution to journalArticleAcademicpeer-review

    4 Citations (Scopus)

    Abstract

    The power imbalance between different waveguide outputs is compensated by manipulating the dispersion of the guided propagation in the multimode interference (MMI) region. This is attainable using a tapered region at the beginning of the MMI region that has been verified through simulation and experiment. From this, the fabrication tolerance for the diameters of holes in a tapered 1 × 3 photonic crystal waveguide (PhCW) splitter is relaxed up to a range of at least 27nm. The output power is well-balanced to within 1 dB. The effective bandwidth of the splitters shifts only around 13nm, for a reduction of 10nm in the diameter of the PhCW holes. The optimized component is an outstanding ultracompact 1 × 3 splitter for the photonic integrated circuit (PIC). © 2011 Optical Society of America.
    Original languageEnglish
    Pages (from-to)3058-3060
    JournalOptics Letters
    Volume36
    Issue number16
    DOIs
    Publication statusPublished - 2011

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