Subcarrier multiplexing by chaotic multitone modulation

Author

Juang, Cheng ; Huang, Shaw Tzuu ; Liu, Chin Yueh ; Wang, Wei Chung ; Hwang, Tsung Min ; Juang, Jonq ; Lin, Wen Wei

Author_Institution

Electron. Dept., Ming Hsin Univ., Hsinchu, Taiwan

Volume

39

Issue

10

fYear

2003

Firstpage

1321

Lastpage

1326

Abstract

Subcarrier multiplexing by chaotic multitone modulation is investigated. Optical chaotic light can be achieved by injecting multiple subcarriers into a self-pulsating laser diode. Synchronization between two identical chaotic systems (drive and response) can be implemented provided that the conditional Lyapunov exponents are all negative. By adding amplitude modulation (AM) signals to each subcarrier, the two systems become asymptotically synchronized. The AM signals in each subcarrier can be recovered by the introduction of a filtering process where the Lyapunov exponent of the synchronized error function matches the cutoff frequency of a first order low pass filter.

Keywords

amplitude modulation; low-pass filters; optical chaos; optical communication equipment; optical modulation; semiconductor lasers; subcarrier multiplexing; synchronisation; AM signals; amplitude modulation signals; asymptotically synchronized; chaotic multitone modulation; conditional Lyapunov exponents; cutoff frequency; filtering process; first order low pass filter; optical chaotic light; self-pulsating laser diode; subcarrier multiplexing; subcarrier recovery; synchronization; synchronized error function; Amplitude modulation; Chaos; Diode lasers; Filtering; Frequency synchronization; Low pass filters; Matched filters; Optical filters; Optical modulation; Signal processing;

fLanguage

English

Journal_Title

Quantum Electronics, IEEE Journal of

Publisher

ieee

ISSN

0018-9197

Type

jour

DOI

10.1109/JQE.2003.817662

Filename

1233737