Unconstrained splitting ratios in compact double-MMI couplers

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    34 Citations (Scopus)


    A novel guided-wave optical power coupler is presented, based on two 2x2 50/50 multimode interference splitters connected with tapered waveguides that play the role of a phase shifter. By simply changing the length of this phase shifter, these double-MMI couplers can be easily designed to get any desired splitting ratio. Results of simulations are discussed and compared with the characterizations of devices fabricated on micron-scale SOI wafers, to highlight pros and cons of the proposed solution. The fabricated splitters have been found to have average losses about 0.4 ± 0.5 dB and splitting ratios ranging from 56/44 to 96/4.
    Original languageEnglish
    Pages (from-to)9245-9253
    JournalOptics Express
    Issue number8
    Publication statusPublished - 21 Apr 2014
    MoE publication typeA1 Journal article-refereed


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