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Hyperchaotic dynamics and synchronization of external-cavity semiconductor lasers Volker Ahlers,* Ulrich Parlitz, and Werner Lauterborn
 

Summary: Hyperchaotic dynamics and synchronization of external-cavity semiconductor lasers
Volker Ahlers,* Ulrich Parlitz, and Werner Lauterborn
Drittes Physikalisches Institut, Universita¨t Go¨ttingen, Bu¨rgerstraße 42-44, D-37073 Go¨ttingen, Germany
Received 15 May 1998
Two unidirectionally coupled external cavity semiconductor lasers showing chaotic intensity fluctuations are
studied by numerically solving the Lang-Kobayashi model equations IEEE J. Quantum Electron. QE-16, 347
1980 . The systems are shown to synchronize when operating in the regime of low-frequency fluctuations,
which is characterized by a very high-dimensional (d 150) attractor. The influence of parameter differences
between the two lasers on the synchronization quality is investigated. S1063-651X 98 02512-4
PACS number s : 05.45. b, 42.55.Px, 42.65.Sf
I. INTRODUCTION
Synchronization phenomena are of fundamental impor-
tance for many physical, biological, and technical systems.
Since the pioneering work by Fujisaka and Yamada 1 , Pik-
ovsky 2 , and Afraimovich, Verichev, and Rabinovich 3 , it
has been known that even chaotic systems may synchronize.
This aspect of nonlinear dynamics became an issue of great
interest when Pecora and Carroll demonstrated synchroniza-
tion of unidirectionally coupled chaotic systems 4 and sug-
gested potential applications in communication systems. Ex-

  

Source: Ahlers, Volker - Fakultät IV - Wirtschaft und Informatik, Fachhochschule Hannover

 

Collections: Computer Technologies and Information Sciences