Optical-communication systems based on chaos in semiconductor lasers

J. M. Liu*, H. F. Chen, S. Tang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

68 Scopus citations


Chaotic optical-communication systems using semiconductor lasers are studied. The dynamics, synchronization, and message encoding and decoding are modeled and studied numerically and experimentally for two systems which are based on optical injection and delayed optoelectronic feedback of semiconductor lasers, respectively. An optically-injected single-mode semiconductor laser is a nonautonomous nonlinear system of three dynamical variables. It has phase-sensitive dynamics that follow a period-doubling route to chaos. A single-mode semiconductor laser with delayed optoelectronic feedback is an autonomous, delayed-feedback nonlinear system with only two dynamical variables, but its dimension can be very high when the delay time is large. It has phase-insensitive pulsing dynamics that follows a quasi-periodic route to chaotic pulsing. Stable synchronization for both systems are devised, modeled, and studied numerically and experimentally. Message encoding schemes for chaotic communication systems based on the concept of chaos modulation are devised and implemented for both systems to encode and decode optically transmitted messages.

Original languageEnglish
Pages (from-to)1475-1483
Number of pages9
JournalIEEE Transactions on Circuits and Systems I: Fundamental Theory and Applications
Issue number12
StatePublished - Dec 2001


  • Chaos modulation
  • Chaotic communication
  • Chaotic synchronization
  • Message encoding and decoding
  • Semiconductor lasers


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