ON/OFF phase shift keying for chaos-encrypted communication using external-cavity semiconductor lasers

Synchronization phenomena of two chaotically emitting semiconductor lasers subject to delayed optical feedback are investigated. The lasers are unidirectionally coupled via their optical fields. Our experimental and numerical studies demonstrate that the relative optical feedback phase is of decisiv...

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Bibliographic Details
Published in:IEEE journal of quantum electronics 2002-09, Vol.38 (9), p.1162-1170
Main Authors: Heil, T., Mulet, J., Fischer, I., Mirasso, C.R., Peil, M., Colet, P., Elsasser, W.
Format: Article
Language:English
Subjects:
Chaos theory
Chaotic communication
Fiber lasers
Frequency synchronization
Laser feedback
Lasers
Mathematical models
Optical coupling
Optical feedback
Optical receivers
Optical transmitters
Phase shift keying
Semiconductor lasers
Synchronism
Synchronization
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Summary:Synchronization phenomena of two chaotically emitting semiconductor lasers subject to delayed optical feedback are investigated. The lasers are unidirectionally coupled via their optical fields. Our experimental and numerical studies demonstrate that the relative optical feedback phase is of decisive importance: a characteristic synchronization scenario evolves under variation of the relative optical-feedback phase mediating cyclically between chaos synchronization in conjunction with coherent fields, and uncorrelated states in conjunction with incoherent fields. As a key result, we propose, and numerically demonstrate, a novel ON/OFF phase shift keying method opening up new perspectives for applications in communication systems using chaotic carriers.
ISSN:0018-9197
1558-1713
DOI:10.1109/JQE.2002.801950