Subcarrier multiplexing by chaotic multitone modulation

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

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


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.

Original languageEnglish
Pages (from-to)1321-1326
Number of pages6
JournalIEEE Journal of Quantum Electronics
Issue number10
StatePublished - 1 Oct 2003


  • Asymptotic synchronization
  • Chaotic modulation
  • Self-pulsating laser diodes
  • Subcarrier multiplexing

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