Pulse advancement and delay in an integrated optical two-port ring-resonator circuit: direct experimental observations

H.P. Uranus, L. Zhuang, C.G.H. Roeloffzen, Hugo Hoekstra

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    22 Citations (Scopus)


    We report experimental observations of the negative-group-velocity (v_g) phenomenon in an integrated-optical two-port ring-resonator circuit. We demonstrate that when the v_g is negative, the (main) peak of output pulse appears earlier than the peak of a reference pulse, while for a positive v_g, the situation is the other way around. We observed that a pulse splitting phenomenon occurs in the neighborhood of the critical-coupling point. This pulse splitting limits the maximum achievable delay and advancement of a single device as well as facilitating a smooth transition from highly advanced to highly delayed pulse, and vice versa, across the critical-coupling point.
    Original languageUndefined
    Pages (from-to)2620-2622
    Number of pages3
    JournalOptics letters
    Issue numberSupplement/17
    Publication statusPublished - Sep 2007


    • IR-62043
    • METIS-245835
    • EWI-11516

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