Synchronized chaotic optical communications at high bit rates

Jia Ming Liu*, How Foo Chen, Shuo Tang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

170 Scopus citations


Basic issues regarding synchronized chaotic optical communications at high bit rates using semiconductor lasers are considered. Recent experimental results on broadband, high-frequency, phase-locked chaos synchronization, and message encoding-decoding at 2.5 Gb/s are presented. System performance at a bit rate of 10 Gb/s is numerically studied for the application of three encryption schemes, namely chaos shift keying, chaos masking, and additive chaos modulation, to three chaotic semiconductor laser systems, namely the optical injection system, the optical feedback system, and the optoelectronic feedback system. By causing synchronization error in the forms of synchronization deviation and desynchronization bursts, the channel noise and the laser noise both have significant effects on the system performance at high bit rates. Among the three laser systems, the optoelectronic feedback system has the best performance while the optical feedback system has the worst. Among the three encryption schemes, only the performance of additive chaos modulation with low-noise lasers is acceptable at high bit rates.

Original languageEnglish
Pages (from-to)1184-1196
Number of pages13
JournalIEEE Journal of Quantum Electronics
Issue number9
StatePublished - Sep 2002


  • Chaos
  • Chaotic communications
  • Cryptography
  • Optical communications
  • Semiconductor lasers
  • Synchronization


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