Wideband Chaos With Time-Delay Concealment in Vertical-Cavity Surface-Emitting Lasers With Optical Feedback and Injection

Hong, Yanhua; Spencer, P.S.; Shore, K.A.

doi:10.1109/jqe.2014.2304745

Cited by 75 publications

(28 citation statements)

References 33 publications

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“…In this way ω = 2π ν x + αγ a − γ p . The optical feedback terms are the last ones in equations (1) and (2), where k f is the strength of the feedback, fixed in this work at 5 ns −1 and τ is the feedback roundtrip time, whose value is 80 ns, similar to the experiments of [19] and [20].…”

Section: Theoretical Model and Proceduresmentioning

confidence: 99%

“…The chaos bandwidth is defined by using the radiofrequency spectra of the temporal traces of the power obtained through the simulations of the model. We define the chaotic bandwidth as the span between the dc and the frequency where 80% of the energy is contained within it [19]- [22].…”

Section: Theoretical Model and Proceduresmentioning

confidence: 99%

“…One of the most important quantities for the applications of the optical chaos is the bandwidth of the chaos. Methods developed to enhance this bandwidth have focused on the use of single optical injection in VCSELs [19]- [21] or DFB [22], [23] subject to optical feedback, double optical injection in chaotic Fabry-Perot laser diodes [24] or VCSELs with a fiber ring resonator [25]. Very recently, Hong et al [19], [20] have experimentally developed several strategies to enhance the chaotic bandwidth: continuous wave (CW) or a chaotic beam unidirectionally injected into a chaotic slave VCSEL, a chaotic VCSEL unidirectionally and mutually coupled with a CW VCSEL, and a CW VCSEL coupled with another CW VCSEL.…”

mentioning

confidence: 99%

“…It has been experimentally shown that this strategy enhances the bandwidth of chaos [20]. Experimental conditions of [19], [20] correspond to the case of parallel optical injection. In this type of injection linearly polarized light is injected parallel to the linear polarization of the free-running VCSEL.…”

mentioning

confidence: 99%

See 3 more Smart Citations

Enhancement of Chaotic Signal Bandwidth in VCSELs Induced by Polarized Optical Injection

Pérez

Valle

2015

IEEE J. Quantum Electron.

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Section: Theoretical Model and Proceduresmentioning

confidence: 99%

Section: Theoretical Model and Proceduresmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Enhancement of Chaotic Signal Bandwidth in VCSELs Induced by Polarized Optical Injection

Pérez

Valle

2015

IEEE J. Quantum Electron.

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“…The optical chaos generated by semiconductor lasers subject to various types of delayed feedback has attracted considerable interest during the last two decades [4][5][6] . From applications point of view, it has some interesting features such as broadband spectrum and extreme sensitivity to initial conditions.…”

Section: Introductionmentioning

confidence: 99%

A new technique for ultrafast physical random number generation using optical chaos

Elsonbaty

Hegazy²,

Obayya

2016

SPIE Proceedings

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In this paper, we numerically demonstrate a new extraction scheme for generating ultra-fast physically random sequence of bits. For this purpose, we utilize a dual-channel optical chaos source with suppressed time delayed (TD) signature in both the intensity and the phase of its two channels. The proposed technique uses M 1-bit analog-to-digital converters (ADCs) to compare the level of the chaotic intensity signal at time t with its levels after incommensurable delay-interval T m , where { }. The binary output of each 1-bit ADC is then sampled by a positive-edge-triggered D flipflop. The clock sequence applied to the flip-flops is relatively delayed such that the rising edge of the clock triggering the m flip-flop precedes the rising edge of the clock of a subsequent m+1 flip-flop by a fixed period. The outputs of all flipflops are then combined by means of a parity-check logic. Numerical simulations are carried out using values of parameters at which TD signature is suppressed for chosen values of setup parameters. The 15 statistical tests in Special Publication 800-22 from NIST are applied to the generated random bits in order to examine the randomness quality of these bits for different values of M. The results show that all tests are passed from M = 1 to M = 39 at sampling rate up to 34.5 GHz which indicates that the maximum generation rate of random bits is 2.691 Tb/sec using a chaotic source of single VCSEL and without employing any pre-processing techniques.

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Review on the broadband time‐delay‐signature‐suppressed chaotic laser

Wei

Qiao

Chai

et al. 2021

Micro & Optical Tech Letters

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Chaotic laser generated by semiconductor lasers has been attached great importance in areas of secure communication, random number generation, and optical sensing. This article mainly reviews the research progress in the performance improvement of chaotic laser, including bandwidth enhancement and time-delay signature suppression. First, the methods of chaotic laser generation and the existing problems are briefly introduced. Then, innovative methods for the optimization of chaotic characteristics are analyzed and discussed. The integrated chaotic semiconductor lasers are also discussed. At last, avenues for the development trends and future applications of chaotic semiconductor lasers are prospected.

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Wideband Chaos With Time-Delay Concealment in Vertical-Cavity Surface-Emitting Lasers With Optical Feedback and Injection

Cited by 75 publications

References 33 publications

Enhancement of Chaotic Signal Bandwidth in VCSELs Induced by Polarized Optical Injection

Enhancement of Chaotic Signal Bandwidth in VCSELs Induced by Polarized Optical Injection

A new technique for ultrafast physical random number generation using optical chaos

Review on the broadband time‐delay‐signature‐suppressed chaotic laser

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