Search query: Semiconductor laser synchronization

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abstract: Abstract The cluster synchronization properties of 12 different networks that consist of five semiconductor lasers (SLs) are systematically investigated through theoretical analysis and numerical simulation. The emergence of clusters in different networks is analytically predicted, and then numerically proved in SL networks. The synchronization properties between each pair of SL nodes in a network are quantified by the zero lag cross correlation coefficient of laser intensities. The impacts of injection strength and bias current on the synchronization quality are investigated, the robustness of clusters against noise is also considered. All the expected clusters are successfully obtained in the simulation and are robust to noise. However, for some networks, different clusters may also emerge with the variation of parameters. In addition, for most networks considered in this paper, the small difference in topologies can bring about tremendous change in synchronized clusters or the synchronization properties of clusters, but for other networks no obvious change can be observed. Moreover, the synchronization properties between nodes from different clusters are also considered. The numerical results not only validate the availability of the adopted analytical method, but also shed some light on possible applications of synchronization control or tolerance of connection failure within networks of SLs.
author_names: Yanan Han

Shuiying Xiang

Liyue Zhang
title: Cluster synchronization in mutually coupled semiconductor laser networks with different topologies
venue: Optics Communications
year: 2019

abstract: A new secure key distribution scheme based on the dynamic chaos synchronization of two cascaded semiconductor laser systems (CSLSs) subject to common chaotic injection and random phase modulated optical feedback is demonstrated. In this scheme, Alice and Bob adopt two independent random sequences to control the phase modulators of CSLSs, which induces a dynamic perturbation to the chaos synchronization. We thoroughly investigate the chaos synchronization performance under different phase shift conditions with cross correlation function, and systematically discuss the feasibility and security of the system. The results show that, with proper injection and feedback strength, the correlation coefficient gap between phase shift match and mismatch is clear and robust to the parameter mismatches in the CSLSs and those between the two CSLSs. Based on this, high quality key distribution can be performed by picking out the identical random bits from the two independent random sequences according to the computational correlation. Moreover, the investigations on the information theoretic security and rate of the key distribution show that the security of the key distribution scheme can be further enhanced by properly increasing the number of layers in the CSLSs or employing high order modulation format.
author_names: Chenpeng Xue

Ning Jiang

Yunxin Lv

Kun Qiu
title: Secure Key Distribution Based on Dynamic Chaos Synchronization of Cascaded Semiconductor Laser Systems
venue: IEEE Transactions on Communications
year: 2017

abstract: Langevin noise leads to inhibition of the temporal synchronization of the pulse oscillations from a gain switched multimode semiconductor laser, resulting in the power reduction in optical beat detection. In this paper, the degree of the temporal synchronization of the pulse oscillations was examined by numerically estimating the output energy in THz time domain spectroscopy (THz TDS) using multimode semiconductor laser rate equations that include Langevin noise. The degree was estimated to be 95.5% from the ratio of the averaged THz TDS output energy for the case where Langevin noise was included to that for when Langevin noise was excluded. Therefore, a gain switched multimode semiconductor laser can be regarded as equivalent to optical pulses oscillating simultaneously in all modes in actual applications including optical beat detection.
author_names: Kenji Wada

Naoaki Kitagawa

Tetsuya Matsuyama
title: The Degree of Temporal Synchronization of the Pulse Oscillations from a Gain Switched Multimode Semiconductor Laser
venue: Materials
year: 2017

abstract: Nonlinear dynamics of a semiconductor laser subjected optical feedback observed numerically. The investigation performed based on numerical simulation of Lang Kobayashi time delay rate equations over wide range of optical feedback strength. The results show that under small, moderate and high optical feedback strength semiconductor laser output power goes different dynamical regimes involving steady state, periodic, mixed modes and chaotic spiking. These dynamics analyzed by time series and their FFt power spectrum with phase space trajectory. The bifurcation diagram is drawn as a function of optical feedback strength. Chaos synchronization in unidirectional coupling scheme numerically presented.
author_names: Nasraldien A Eashag Saeed

Sora F Abdalah

Abdelmoneim Mohamed Awadelgied

Kais A Al Naimee
title: SPILKING GENERATION AND SYNCHRONIZATION IN SEMICONDUCTOR LASER BY MEANS OF OPTICAL FEEDBACK
year: 2017

abstract: Abstract We investigate the synchronization in coupled time delayed semiconductor laser models without and under the influence of external noise sources. The synchronization and its robustness are observed by mean synchronization error and the effect of parameter mismatch respectively. A communication scheme is introduced based on symmetrical encryption and decryption method in the frame of coupled synchronized lasers with optical feedback. The scheme is effective irrespective of the nature and dynamics of the transmitted signal. The security of the scheme is verified by the effect of relative parameter mismatch, key sensitivity frequency and cross correlation analysis. Numerical results support the proposed analysis.
author_names: Thang Manh Hoang

Sanjay Kumar Palit

Sayan Mukherjee

Santo Banerjee
title: Synchronization and secure communication in time delayed semiconductor laser systems
year: 2016

abstract: A model of a planar semiconductor multi channel laser is developed. In this model two dimensional (2D) Bragg mirror structures are used for synchronizing radiation of multiple laser channels. Coupling of longitudinal and transverse waves can be mentioned as the distinguishing feature of these structures. Synchronization of 20 laser channels is demonstrated with a semi classical approach based on Maxwell Bloch equations.
author_names: V R Baryshev

Naum S Ginzburg
title: Synchronization of semiconductor laser arrays with 2D Bragg structures
year: 2016

abstract: Two multi semiconductor laser (SL) topologies, based on mutually coupled semiconductor lasers representing a startype and a mesh type network are evaluated in terms of their synchrony potential and their sensitivity towards critical SLs' intrinsic and operational parameters. The coupling topology, the coupling conditions and the values of key SL parameters determine the type of dynamics of the emitted optical signals. The number of nodes and the detuning in their fundamental properties have been assessed to be decisive in terms of efficiency and quality of synchronized outputs, as wells as for the overall dynamical map of the network. Our investigation mainly focuses on discrepancies in SL parameter values and their effect on the efficiency of synchronized dynamics. This type of investigation will provide preliminary guidelines on building experimentally large scale networks of coupled SLs under various coupling matrices that could support optical sensing or cryptographic applications.
author_names: Michail Bourmpos

Apostolos Argyris

Dimitris Syvridis
title: Coupled semiconductor laser network topologies for efficient synchronization
venue: Photonics West Optoelectronic Materials and Devices
year: 2015

abstract: Optical chaos communication has advantages of high speed and long transmission distance. Unfortunately, the key space of the traditional transceiver, i.e. semiconductor laser with mirror feedback, is limited due to the time delay signature. In this paper, we propose and numerically demonstrate a key space enhancement by using semiconductor laser with optical feedback from a chirped fiber Bragg grating (FBG) The chirped FBG feedback can make feedback delay a key parameter by eliminating the time delay signature. Moreover, the grating dispersion and center frequency can also be used as new keys. As a result, the dimension of key space is increased. By taking a bidirectional communication scheme as an example, numerical results show that the key space is raised by 244 times as against mirror feedback with a data rate of 2.5 Gb/s and a coupling strength of 0.447. As the coupling strength decreases, the key space increases due to the fact that chaos synchronization becomes more sensitive to parameter mismatch.
author_names: Da Wang

Louis S Wang

Y Y Guo

Yu Cheng Wang

A B Wang
title: Key space enhancement of optical chaos secure communication: chirped FBG feedback semiconductor laser.
venue: Optics express
year: 2019

abstract: We discuss a model of anticipated synchronization of two distributed feedback lasers (DFB) with passive dispersive reflector. The influence of passive dispersive reflector parameters on the anticipated synchronization is discussed. The conditions for delayed, perfect and anticipated synchronizations are explored in detail.
author_names: Nellu Ciobanu

Spiridon Rusu

Vasile Tronciu
title: Anticipated Synchronization of Passive Dispersive Reflector Semiconductor Laser
year: 2016

abstract: In this paper, synchronization of multiple chaotic semiconductor lasers is achieved by appealing to complex system theory. In particular, we consider dynamical networks composed by semiconductor laser, as interconnected nodes, where the interaction in the networks are defined by coupling the first state of each node. An interest case is synchronized with master slave configuration in star topology. Nodes of these networks are modeled for the laser and simulate by Matlab. These results are applicable to private communication. Keywords Synchronization, chaotic laser, network.
author_names: Rosa Martha Lopez-Gutierrez

L Cardoza-Avendano

H Cervantes-de Avila

J A Michel-Macarty

Cesar Cruz-Hernandez

Adrian Arellano-Delgado

R Carmona-Rodriguez
title: Synchronization of Semiconductor Laser Networks
year: 2015