Coupled multimode analysis of anisotropic heterostructure waveguides and its application to a light modulator


  • Masamitsu Nakajima,

  • Hidetoshi Onodera,

  • Jun-ichi Ikenoue


A method of analysis for anisotropic planar optical waveguides is presented by taking the finite thickness of the substrate into account wherein the substrate radiation mode is quantized to have a discrete spectrum of propagation constants rather than a continuous spectrum. The analytical procedure is thereby systematized and makes it possible for a computer solution to obtain accurate results. As an example, this method is applied to the analysis of a light modulator in which the coupling of a guided mode to radiation modes is electrooptically controlled.