Two-point coupling method to independently control coupling efficiency at different wavelengths

Dohyeong Kim, Sangyoon Han, Dae Gon Kim, Kiyoung Ko, Duk Yong Choi, Hansuek Lee

    Research output: Contribution to journalArticlepeer-review

    11 Citations (Scopus)

    Abstract

    To efficiently access light waves confined in a high-quality-factor (Q) microcavity over a wide spectral range, it is necessary to independently control coupling efficiency at different wavelengths. Here we suggest an approach to add a degree of freedom to control the coupling efficiency based on a two-point coupling geometry. By changing the phase difference between two paths connecting two coupling points, various combinations of coupling efficiencies at multiple wavelengths can be achieved. An analytic model describing the coupling property is derived and confirmed by experimental results. It is also shown that the coupling property can be modified by adjusting the effective refractive index difference between a waveguide and a resonator.

    Original languageEnglish
    Pages (from-to)106-109
    Number of pages4
    JournalOptics Letters
    Volume47
    Issue number1
    DOIs
    Publication statusPublished - 1 Jan 2022

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