Hybrid analytical/numerical coupled-mode modeling of guided-wave devices

Manfred Hammer

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    26 Citations (Scopus)
    74 Downloads (Pure)

    Abstract

    A general version of coupled-mode-theory for frequency domain scattering problems in integrated optics is proposed. As a prerequisite a physically reasonable field template is required, that typically combines modes of the optical channels in the structure with coefficient functions of in principle arbitrary coordinates. Upon 1-D discretizations of these amplitude functions into finite elements, a Galerkin procedure reduces the problem to a system of linear equations in the element coefficients, where given input amplitudes are included. Smooth approximate solutions are obtained by solving the system in a least squares sense. The versatility of the approach is illustrated by means of a series of 2-D examples, including a perpendicular crossing of waveguides, and a grating-assisted rectangular resonator. As an appendix, we show that alternatively a similar procedure can be derived by variational means, i.e. by restricting a suitable functional representation of the full 2-D/3-D vectorial scattering problem (with transparent influx boundary conditions for inhomogeneous exterior) to the respective field templates.
    Original languageUndefined
    Article number10.1109/JLT.2007.901438
    Pages (from-to)2287-2298
    Number of pages15
    JournalJournal of lightwave technology
    Volume25
    Issue number9
    DOIs
    Publication statusPublished - Sep 2007

    Keywords

    • PACS-42.82
    • PACS-42.82.Bq
    • PACS-42.82.Et
    • Integrated Optics
    • Coupled mode theory
    • IR-67080
    • Numerical modeling
    • Variational modeling
    • EWI-9726
    • METIS-245706
    • Transparent-Influx Boundary Conditions

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