Title :
Coupled-mode analysis of leaky waves in channel waveguides consisting of anisotropic material
Author :
Geshiro, Masahiro ; Hotta, Masashi ; Kameshima, Tomotoshi
Author_Institution :
Dept. of Electr. & Electron. Eng., Ehime Univ., Japan
Abstract :
A study of leaky waves in anisotropic circular channel waveguides consisting of uniaxial crystalline material, in which the optical axis is on the plane defined by the propagation axis and one of the transverse coordinates axes, is discussed. The analysis is based on the theory of coupled modes. Mathematical discretization of the continuum of radiation modes offers satisfactorily accurate solutions of the coupled-mode equations. The characteristics of leakage losses and the field distributions of leaky waves in a LiNbO3 waveguide are discussed on the basis of the numerical results
Keywords :
integrated optics; lithium compounds; optical couplers; optical losses; optical waveguide theory; LiNbO3 waveguide; anisotropic material; channel waveguides; circular channel waveguides; coupled modes; field distributions; leakage losses; leaky waves; optical axis; propagation axis; transverse coordinates axes; uniaxial crystalline material; Anisotropic magnetoresistance; Coupled mode analysis; Crystalline materials; Equations; Geometrical optics; Optical losses; Optical propagation; Optical waveguide theory; Optical waveguides; Planar waveguides;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
