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Optica Publishing Group
  • CLEO/Europe and IQEC 2007 Conference Digest
  • (Optica Publishing Group, 2007),
  • paper JSI3_2

Synchronization of Chaotic Unidirectionally Coupled Multisection Lasers

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Abstract

Chaos based communication is an alternative technique to encode and transmit information at high bit rate in conventional optical communication systems. A promising new encryption method termed on/off phase shift keying (OOPSK) has been proposed recently [1]. It bases on unidirectionally coupled external cavity lasers whose synchronization switches on and off when changing the masters feedback phase by a portion of 2π. Since it is known that fast encryption rates require short cavity lengths, we investigate the ultrashort cavity regime. This regime can be achieved by integrating the feedback path into a multisection semiconductor laser. The result is a compact and robust device which, in addition to the short time scales, is an important requirement for possible applications [2].

© 2007 IEEE

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