Optical-communication systems based on chaos in semiconductor lasers

TitleOptical-communication systems based on chaos in semiconductor lasers
Publication TypeJournal Article
Year of Publication2001
AuthorsLiu, J. M., H. F. Chen, and S. Tang
JournalCircuits and Systems I: Fundamental Theory and Applications, IEEE Transactions on
Pagination1475 -1483
Date Publisheddec.
Keywordsautonomous delayed-feedback nonlinear system, chaos modulation, chaotic communication, chaotic optical communication, chaotic pulsing, decoding, delayed optoelectronic feedback, encoding, laser feedback, message decoding, message encoding, nonautonomous nonlinear system, nonlinear dynamical systems, optical communication, optical injection, optically-injected single-mode semiconductor laser, period-doubling route, phase-insensitive pulsing dynamics, phase-sensitive dynamics, quasi-periodic route, Semiconductor lasers, stable synchronization, synchronisation, synchronization

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.


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