Square wave solutions in semiconductor lasers with mutual rotated optical coupling

Journées DYCOEC: Synchronization, control and bio-dynamics Organisées par l’Institute FEMTO-ST / Optique – Université de Besançon 9 November 2010EELs with selective orthogonal optical coupling, Experimental apparatus, Squarewaves and characteristics, Mathematical model Simulations Noise effects, Steady states, Mixed modes and pure modes, Existence and coexistence properties,US National Science FoundationFonds National de la Recherche Scientifique (FNRS). -- and the InterUniversity Attraction Pole. -- Washington and Lee UniversityPeer reviewe

Dynamics of a semiconductor laser with polarization rotated feedback and its utilization for random bit generation

Chaotic semiconductor lasers have been proven attractive for fast random bit generation. To follow this strategy, simple robust systems and a systematic approach determining the required dynamical properties and most suitable conditions for this application are needed. We show that dynamics of a single mode laser with polarization-rotated feedback are optimal for random bit generation when characterized simultaneously by a broad power spectrum and low autocorrelation. We observe that successful random bit generation also is sensitive to digitization and postprocessing procedures. Applying the identified criteria we achieve fast random bit generation rates (up to 4Gbit/s) with minimal postprocessing.This work was supported by Ministerio de Ciencia e Innovación (Spain), Fondo Europeo de Desarrollo Regional, and the European Commission under projects TEC2009-14101 (DeCoDicA), 0200950I190 (Proyecto Intramurales Especiales), and EC FP7 Project PHOCUS under grant 240763, respectively. D. W. Sukow acknowledges support of this work through the Spanish National Research Council and the Lenfest Endowment.Peer reviewe

Fast random bit generation using a chaotic laser: Approaching the information theoretic limit

We design and implement a chaotic-based system, enabling ultra-fast random bit sequence generation. The potential of this system to realize bit rates of 160 Gb/s for 8-bit digitization and 480 Gb/s for 16-bit digitization is demonstrated. In addition, we provide detailed insight into the interplay of dynamical properties, acquisition conditions, and post-processing, using simple and robust procedures. We employ the chaotic output of a semiconductor laser subjected to polarization-rotated feedback. We show that not only dynamics affect the randomness of the bits, but also the digitization conditions and postprocessing must be considered for successful random bit generation. Applying these general guidelines, extensible to other chaos-based systems, we can define the optimal conditions for random bit generation. We experimentally demonstrate the relevance of these criteria by extending the bit rate of our random bit generator by about two orders of magnitude. Finally, we discuss the information theoretic limits, showing that following our approach we reach the maximum possible generation rate. © 1965-2012 IEEE.Peer Reviewe

Asymmetric square-waves in mutually-coupled semiconductor lasers with orthogonal optical injection

info:eu-repo/semantics/publishe

Asymmetric square-waves in mutually coupled semiconductor lasers

info:eu-repo/semantics/publishe