Low-loss, single-mode GaAs/AlGaAs waveguides with large core thickness

Author

Ferguson, A.D. ; Kuver, A. ; Heaton, J.M. ; Zhou, Y. ; Snowden, C.M. ; Iezekiel, S.

Author_Institution

Sch. of Electron. & Electr. Eng., Univ. of Leeds, UK

Volume

153

Issue

2

fYear

2006

fDate

4/10/2006 12:00:00 AM

Firstpage

51

Lastpage

56

Abstract

Low-loss, single-mode waveguides with a large core thickness have been designed and fabricated in gallium arsenide/aluminium gallium arsenide waveguides. Detailed beam propagation method simulations were carried out to investigate the modal properties of the waveguides and were compared with measured results. For lengths of 2 cm, insertion losses of ≤3.5 dB were achieved when coupled to conical lensed fibre. This demonstrates a simple method of achieving minimal coupling losses without the need for complex structures such as waveguide tapers. In addition, the propagation loss was measured to have a low value of 0.2±0.09 dB/cm.

Keywords

III-V semiconductors; aluminium compounds; gallium arsenide; integrated optics; lenses; optical design techniques; optical fabrication; optical fibre couplers; optical losses; optical waveguides; GaAs-AlGaAs; GaAs-AlGaAs waveguides; beam propagation method; conical lensed fibre; coupling losses; insertion losses; large core thickness; low-loss waveguides; modal properties; propagation loss; single-mode waveguides; waveguide design; waveguide fabrication;

fLanguage

English

Journal_Title

Optoelectronics, IEE Proceedings -

Publisher

iet

ISSN

1350-2433

Type

jour

DOI

10.1049/ip-opt:20050024

Filename

1593508