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Phys. Rev. E 68, 016215 (2003) [7 pages]

Generalized synchronization of chaos in He-Ne lasers

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A. Uchida1, K. Higa1, T. Shiba1, S. Yoshimori1, F. Kuwashima2, and H. Iwasawa3
1Department of Electronics and Computer Systems, Takushoku University, 815-1 Tatemachi, Hachioji, Tokyo 193-0985, Japan
2Hiroshima National College of Maritime Technology, 4272-1 Higashino, Oosakikamishima-cho, Toyota-gun, Hiroshima 725-0231, Japan
3Hiroshima Kokusai Gakuin University, 6-20-1 Nakano, Akiku, Hiroshima-shi, Hiroshima 739-0321, Japan

Received 31 July 2002; revised 28 April 2003; published 18 July 2003

We experimentally demonstrate synchronization of chaos in one-way coupled He-Ne lasers with optical feedback. We observe different types of synchronization such as identical synchronization, inverse synchronization, and random amplification. These dynamics are maintained only for a short duration of several hundred milliseconds. We also observe generalized synchronization of chaos by using one master and two slave lasers. The generalized synchronization is achieved for a long duration of tens of seconds under injection locking. The generalized synchronization is always maintained while the injection locking is achieved.

© 2003 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevE.68.016215
DOI:
10.1103/PhysRevE.68.016215
PACS:
05.45.Xt, 42.65.Sf, 42.55.Lt
 
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