Abstract
Transmission and reflection properties are studied for a butt joint between an isotropic slab waveguide and an anisotropic one consisting of uniaxial crystalline material which has the optical axis in the plane defined by the propagation axis and the normal of the waveguide surface. The effects of axial displacement and angular misalignment are discussed on the basis of numerical results obtained from two different formulas: one is derived from the boundary condition together with the modal orthogonality and the other is based on the simple overlap integral of modal profiles. It is confirmed that the simple formula in terms of the overlap integral is applicable to the characterization of butt joints involving anisotropic waveguides.
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