Unidirectional synchronization of single-mode semiconductor lasers

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

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review


For chaotic optical communications using semiconductor lasers, synchronization of the chaotic waveforms of two semiconductor lasers, one functioning as the transmitter and the other as the receiver, has to be accomplished. Two systems of single-mode semiconductor lasers that exhibit chaotic behaviour are considered. A single-mode semiconductor laser with optical injection follows a period-doubling route to chaos, whereas one with delayed optoelectronic feedback follows a quasiperiodic route to chaotic pulsing. The strategy for devising a scheme for synchronizing two semiconductor lasers is to make the coupled transmitter and receiver lasers to be described by two sets of dynamical equations of identical form. The transmitter and receiver are coupled through a signal and are both driven by a force that is a function of the signal. Any message to be communicated can be encoded in the signal. Schemes for synchronization with unidirectional coupling are devised, modeled, and studied for both optical injection and optoelectronic feedback systems. Experimental data on the synchronization of both systems are presented. Methods for encoding and decoding messages are also discussed for both systems.

Original languageEnglish
Pages (from-to)325-334
Number of pages10
JournalProceedings of SPIE - The International Society for Optical Engineering
StatePublished - 2001
EventPhysics and Simulation of Optoelectronic Devices IX - San Jose, CA, United States
Duration: 22 Jan 200126 Jan 2001


  • Chaotic communications
  • Chaotic synchronization
  • Optical injection
  • Optoelectronic feedback
  • Semiconductor lasers


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