Design of externally tuned asymmetric fibre Fabry-Perot electroabsorption optical modulators

Author

Xu, M.G. ; Nener, B.D. ; Dell, J.M.

Author_Institution

Dept. of Electr. & Electron. Eng., Western Australia Univ., Nedlands, WA, Australia

Volume

145

Issue

6

fYear

1998

fDate

12/1/1998 12:00:00 AM

Firstpage

344

Lastpage

352

Abstract

The authors present design criteria for a fibre-matched, externally tunable, asymmetric Fabry-Perot, electroabsorption optical modulator. The theoretical analysis includes the effects of angular distribution of the incident power, optical bandwidth of the source, cavity finesse, and the power-coupling loss for both singlemode and multimode step-index fibre devices. The results indicate that, for a laser source, fibre with standard numerical aperture of 0.2 and a fibre front-end reflectivity of 0.6, a cavity length less than four times of the working wavelength is required to obtain 10 dB contrast for both singlemode- and multimode-fibre devices, while an optimum cavity length exists for minimum insertion loss. A theoretical analysis of degradation of device performance with mirror-surface roughness, mirror mismatch and mirror misalignment is also presented, showing that such devices have high tolerance to these deviations

Keywords

Fabry-Perot resonators; electro-optical modulation; electroabsorption; optical fibres; optical tuning; angular distribution; asymmetric Fabry-Perot electroabsorption optical modulator; cavity finesse; cavity length; contrast; design; external tuning; fibre matching; insertion loss; mirror misalignment; mirror mismatch; mirror surface roughness; multimode step-index fibre device; numerical aperture; optical bandwidth; power coupling loss; reflectivity; singlemode step-index fibre device;

fLanguage

English

Journal_Title

Optoelectronics, IEE Proceedings -

Publisher

iet

ISSN

1350-2433

Type

jour

DOI

10.1049/ip-opt:19982480

Filename

762371