Multichannel communication using an infinite dimensional spatiotemporal chaotic system

White, J.K.; Moloney, Jerome V.

doi:10.1103/physreva.59.2422

Cited by 72 publications

(29 citation statements)

References 21 publications

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“…Besides, the transition between various synchronization types are not well investigated and obvious analogies between chaotic synchronization in the spatially extended and low-dimensional systems are not formulated. At the same time research of chaotic synchroniza-tion regimes in spatially extended beam-plasma microwave systems seems to be important because of its applications dealing with data transmission [37][38][39][40] and control of chaotic oscillations in microwave electronics systems (see, for example, [41]). …”

Section: Introductionmentioning

confidence: 99%

Chaotic synchronization in coupled spatially extended beam–plasma systems

2006

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The appearance of the chaotic synchronization regimes has been discovered for the coupled spatially extended beam-plasma Pierce systems. The coupling was introduced only on the right bound of each subsystem. It has been shown that with coupling increase the spatially extended beam-plasma systems show the transition from asynchronous behavior to the phase synchronization and then to the complete synchronization regime. For the consideration of the chaotic synchronization we used the concept of time scale synchronization described in work [Chaos, 14, 3 (2004) 603-610] and based on the introduction of the continuous set of phases of chaotic signal. In case of unidirectional coupling the generalized synchronization regime has been observed in the spatially extended beam-plasma systems. The generalized synchronization appearance mechanism has been analyzed by means of the offered modified system approach [Phys. Rev. E, 71, 6 (2005) 067201].

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Section: Introductionmentioning

confidence: 99%

Chaotic synchronization in coupled spatially extended beam–plasma systems

2006

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“…In order to circumvent this limitation, spectral filtering terms were added in the description of broad-band QCLs [18]. On a more fundamental basis, other works report on nonstandard techniques for the adiabatic elimination of the polarization which formally amount to introducing diffusive terms in the equations for the multimode laser field [23]. In order to provide a fundamentally self-consistent modelization, it is desirable to take into account a frequency dependent, asymmetric dispersion/gain line and the Linewidth Enhancement Factor (LEF) that are known to play a critical role in coherent multimode regimes of s.c. lasers [24,25].…”

Section: Introductionmentioning

confidence: 99%

Dynamics of a broad-band quantum cascade laser: from chaos to coherent dynamics and mode-locking

Columbo¹,

Barbieri²,

Sirtori³

et al. 2018

Opt. Express

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Abstract:The dynamics of a multimode Quantum Cascade Laser, is studied in a model based on effective semiconductor Maxwell-Bloch equations, encompassing key features for the radiationmedium interaction such as an asymmetric, frequency dependent, gain and refractive index as well as the phase-amplitude coupling provided by the Henry factor. By considering the role of the free spectral range and Henry factor, we develop criteria suitable to identify the conditions which allow to destabilize, close to threshold, the traveling wave emitted by the laser and lead to chaotic or regular multimode dynamics. In the latter case our simulations show that the field oscillations are associated to self-confined structures which travel along the laser cavity, bridging mode-locking and solitary wave propagation. In addition, we show how a RF modulation of the bias current leads to active mode-locking yielding high-contrast, picosecond pulses. Our results compare well with recent experiments on broad-band THz-QCLs and may help understanding the conditions for the generation of ultrashort pulses and comb operation in Mid-IR and THz spectral regions.

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“…More recently, a field experiment using commercial optical networks has demonstrated the ability and robustness of chaotic semiconductor lasers to transmit high-bit-rate messages in real-world conditions [13]. Both single-mode [10] and multimode [14,15] lasers have proved adequate for optical chaotic communications (in the latter, with the possibility of multiplexing different messages through the longitudinal modes of the laser).…”

Section: Introductionmentioning

confidence: 99%

Synchronization in Semiconductor Laser Rings

Buldú

Torrent

García-Ojalvo

2007

J. Lightwave Technol.

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We examine the dynamics of semiconductor lasers coupled in a ring configuration. The lasers, which have stable output intensity when isolated, behave chaotically when coupled unidirectionally in a closed chain. In this way, we show that neither feedback nor bidirectional coupling is necessary to induce chaotic dynamics at the laser output. We study the synchronization phenomena arising in this particular coupling architecture, and discuss its possible application to chaos-based communications. Next, we extend the study to bidirectional coupling and propose an appropriate technique to optical chaos encryption/decryption in closed chains of mutually coupled semiconductor lasers.

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Multichannel communication using an infinite dimensional spatiotemporal chaotic system

Cited by 72 publications

References 21 publications

Chaotic synchronization in coupled spatially extended beam–plasma systems

Chaotic synchronization in coupled spatially extended beam–plasma systems

Dynamics of a broad-band quantum cascade laser: from chaos to coherent dynamics and mode-locking

Synchronization in Semiconductor Laser Rings

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