Spot size expansion for improved OEIC-to-fibre coupling using directional couplers with 2D confinement

Author

Rajarajan, M. ; Rahman, B.M.A. ; Grattan, K.T.V.

Author_Institution

Dept. of Electr., Electron. & Inf. Eng., City Univ., London, UK

Volume

145

Issue

1

fYear

1998

fDate

2/1/1998 12:00:00 AM

Firstpage

71

Lastpage

76

Abstract

In optical fibre applications, by using an intermediate multiguide directional coupler section, this work has shown that the field profile of the source laser used can be expanded to match that of the receiving optical fibre. The vector H-field finite element method has been employed to determine the modal propagation constants and vector field profiles. An accurate calculation of the excited modal coefficients was achieved by using the least squares boundary residual method, which satisfies the continuity of the transverse field components more rigorously than through the use of the simple overlap integral approach

Keywords

finite element analysis; integrated optoelectronics; least squares approximations; optical communication equipment; optical directional couplers; optical fibre couplers; optical waveguide theory; vectors; 2D confinement; OEIC-to-fibre coupling; directional couplers; excited modal coefficients; field profile; intermediate multiguide directional coupler section; least squares boundary residual method; modal propagation constants; optical fibre applications; overlap integral approach; receiving optical fibre; source laser; spot size expansion; transverse field components; vector H-field finite element method; vector field profiles;

fLanguage

English

Journal_Title

Optoelectronics, IEE Proceedings -

Publisher

iet

ISSN

1350-2433

Type

jour

DOI

10.1049/ip-opt:19981604

Filename

668011