Design of fiber-matched uncladded rib waveguides on InP with polarization-independent mode matching loss of 1 dB

Author

Weinert, C.M.

Author_Institution

Heinrich-Hertz-Inst. fur Nachrichtentech. Berlin GmbH, Germany

Volume

8

Issue

8

fYear

1996

Firstpage

1049

Lastpage

1051

Abstract

A waveguide taper design for uncladded rib or channel waveguides on InGaAsP-InP with polarization-independent coupling loss to the fiber is proposed. The spot size variation of the guided mode along the taper is investigated numerically by a two-dimensional finite difference method. By introducing thin guiding layers below the waveguide it is shown that the taper structure can be designed to have relaxed fabrication tolerances and a mode matching loss to the fiber of 1 dB.

Keywords

III-V semiconductors; finite difference methods; gallium arsenide; indium compounds; mode matching; optical couplers; optical design techniques; optical fibre couplers; optical fibre losses; rib waveguides; semiconductor heterojunctions; InGaAsP-InP; InP; channel waveguides; fiber-matched uncladded rib waveguides; guided mode; mode matching loss; polarization-independent coupling loss; polarization-independent mode matching loss; relaxed fabrication tolerances; spot size variation; taper structure; thin guiding layers; two-dimensional finite difference method; uncladded rib; Finite difference methods; Indium phosphide; Optical device fabrication; Optical fiber losses; Optical fiber polarization; Optical waveguide theory; Optical waveguides; Slabs; Tellurium; Waveguide theory;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/68.508734

Filename

508734