Analysis of chaos generated by a modulated self-pulsating laser diode

Author

Walker, R.P. ; Rees, P. ; Pierce, I. ; Spencer, P.S. ; Roberts, G.W.

Author_Institution

Sch. of Informatics, Univ. of Wales, Bangor, UK

Volume

152

Issue

2

fYear

2005

fDate

4/8/2005 12:00:00 AM

Firstpage

90

Lastpage

96

Abstract

The Lyapunov exponents and plotted bifurcation diagrams for a self-pulsating laser diode under periodic current modulation have been calculated. Different dynamics are obtained dependent on the modulation depth and frequency of the drive current. It is shown that it is very difficult to distinguish between regimes of high periodicity and true chaos. However by introducing a return map relating the pulse peak height and the inter pulse interval clear differences are observed between these regimes. This has consequences for the use of chaotic self-pulsating laser diodes for data encryption applications.

Keywords

Lyapunov methods; chaotic communication; electro-optical modulation; encoding; laser theory; optical chaos; optical communication; semiconductor lasers; Lyapunov exponents; chaos; chaotic self-pulsating laser diodes; data encryption applications; drive current; high periodicity; inter pulse interval clear differences; modulated self-pulsating laser diode; modulation depth; periodic current modulation; plotted bifurcation diagrams; pulse peak height; return map;

fLanguage

English

Journal_Title

Optoelectronics, IEE Proceedings -

Publisher

iet

ISSN

1350-2433

Type

jour

DOI

10.1049/ip-opt:20045032

Filename

1425778