Coupling efficiency of butt-joined isotropic and anisotropic single-mode slab waveguides

Author

Sawa, Shinnosuke ; Geshiro, Masahiro ; Hotta, Masashi ; Kanetake, Haruo

Author_Institution

Dept. of Electr. Eng., Univ. of Osaka Prefecture, Japan

Volume

40

Issue

2

fYear

1992

fDate

2/1/1992 12:00:00 AM

Firstpage

338

Lastpage

345

Abstract

Studied is the effect of axial displacement and angular misalignment on the power-coupling efficiency of a butt-joint between an isotropic and an anisotropic single-mode slab waveguide. The power-coupling coefficient is formulated by means of the boundary conditions at the interface of the butt-joint and the orthogonality relations between the modes in the outgoing waveguide. It is found from the numerical results that proper amounts of angular misalignment and axial displacement remarkably suppress transmission losses when the material coordinate system of the anisotropic waveguide is not aligned with its waveguide coordinate system in the plane defined by the propagation axis and the normal of the waveguide surface

Keywords

optical couplers; optical waveguide theory; angular misalignment; anisotropic single-mode slab waveguide; axial displacement; boundary conditions; butt-joint; isotropic slab waveguide; material coordinate system; numerical results; power-coupling efficiency; transmission losses suppression; waveguide coordinate system; Anisotropic magnetoresistance; Coupling circuits; Geometrical optics; Optical coupling; Optical fiber devices; Optical propagation; Optical waveguides; Planar waveguides; Slabs; Surface waves;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/22.120107

Filename

120107