Analysis of ridge-type LiNbO3 optical waveguide modulators with the extended point-matching method

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)22_Publication in policy or professional journal

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Original languageEnglish
Pages (from-to)318-322
Journal / PublicationZhongguo Jiguang/Chinese Journal of Lasers
Issue number3
Publication statusPublished - Mar 2004


The point-matching method is extended to analyze a travelling-wave electrode structure for ridge-type LiNbO3 optical modulators. The potential function is expended in terms of a Fourier sine series, and the coefficients of the series are obtained by satisfying the boundary conditions in the contact plane at a finite, discrete set of points. The calculated fields are used to estimate the characteristic impedance and microwave effective index. This method provides a simple and fast approach to the quasi-static analysis of the multi-layered structures with finite electrode thickness. The results agree well with those obtained using the finite-element method. Some significant conclusions are obtained for design and optimization of modulators.

Research Area(s)

  • LiNbO3, Optical fiber communication technique, Optical waveguide modulator, Point-matching method, Quasi-static analysis