Experimental Evidence of Time-Delay Concealment in a DFB Laser With Dual-Chaotic Optical Injections

Mu, Penghua; Pan, Wei; Yan, Lianshan; Luo, Bin; Li, Nianqiang; Xu, M.

doi:10.1109/lpt.2015.2487519

Cited by 18 publications

(9 citation statements)

References 27 publications

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“…65 In addition, the identification methods of the TDS also include delayed mutual information 66 and permutation entropy 67 in the time domain, and the spectrum identification method 68 in the frequency domain. In order to suppress the TDS of a chaotic signal, scholars have carried out extensive researches, including fiber grating feedback, [69][70][71][72] fiber dispersion effect, [73][74][75] fiber backscattering effect, 76,77 external optical injection, [78][79][80] and other. [81][82][83]…”

Section: Time Delay Signature Suppressionmentioning

confidence: 99%

“…Mu et al performed a dual chaotic optical injection to generate the TDS suppressed chaotic laser in 2016. 79 As shown in Figure 7B, laser diodes (LD1 and LD2) generate two dual chaotic lasers through fiber mirror feedback, which are injected into LD3 through a FC and an OC. The chaotic laser is emitted by the LD3 through the OC.…”

Section: External Optical Injectionmentioning

confidence: 99%

“…After the output light passes through an optical isolator, which is for preventing unnecessary light disturbance, real‐time monitor of the time series, power spectrum and optical spectra is carried out. Mu et al performed a dual chaotic optical injection to generate the TDS suppressed chaotic laser in 2016 79 . As shown in Figure 7B, laser diodes (LD1 and LD2) generate two dual chaotic lasers through fiber mirror feedback, which are injected into LD3 through a FC and an OC.…”

Section: The Performance Improvement Of Chaotic Lasermentioning

confidence: 99%

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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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Section: Time Delay Signature Suppressionmentioning

confidence: 99%

Section: External Optical Injectionmentioning

confidence: 99%

Section: The Performance Improvement Of Chaotic Lasermentioning

confidence: 99%

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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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“…On the contrary, it has been found that an optical injection scheme allows the simultaneous achievement of TDS suppression and bandwidth enhancement, which makes it a tempting option. This can be realized in the conventional semiconductor lasers as well as in other novel laser architectures, e.g., vertical-cavity surfaceemitting semiconductor lasers (VCSELs) [29]- [33]. However, the parameter region for simultaneously achieving these goals is very narrow, which is not suitable for practical applications.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous Chaos Time-Delay Signature Cancellation and Bandwidth Enhancement in Cascade-Coupled Semiconductor Ring Lasers

2019

IEEE Access

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Optics chaos has been widely studied and its various applications have also been demonstrated in recent years. To improve the performance of chaos-based applications, several properties of the chaotic signals should be evaluated and enhanced accordingly. In this paper, we consider a chaotic system consisting of three cascade-coupled semiconductor ring lasers (SRLs), where the master SRL is subjected to conventional (parallel) optical feedback, while its output is injected to the intermediate SRL and further to the slave SRL. We focus on the time-delay signature (TDS) and bandwidth of the generated chaos and demonstrate the possibility of the simultaneous realization of TDS elimination and bandwidth enhancement in the parameter space of the injection strength against the frequency detuning. In addition, a proof-ofconcept test of randomness is carried out, and it demonstrates that the chaotic properties could be greatly enhanced by the proposed cascade-coupling scheme compared with a single SRL with feedback and thus is suitable for use in high-speed random number generation.INDEX TERMS Nonlinear dynamics, optical chaos, semiconductor ring laser, time-delay signature, bandwidth.

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“…Even worse, the TDS induces a security flaw because the drive system may be reconstructed if the delay time is identified [33]. Note that, although many chaotic sources with suppressed TDS have been proposed [34][35][36][37][38][39][40][41][42][43][44][45], their experimental utilization as drive signals to induce chaos synchronization for generating Real-Time 2.5-Gb/s Correlated Random Bit Generation Using Synchronized Chaos Induced by a Common Laser with Dispersive Feedback Longsheng Wang, Daming Wang, Hua Gao, Yuanyuan Guo, Yuncai Wang, Yanhua Hong, K. Alan Shore, Senior Member, IEEE, Anbang Wang, Member, IEEE C correlated random bits has not yet been reported. Approaches in the literature have focused on employing optical sources which are naturally free of the TDS to induce chaos synchronization and then construct correlated random bits.…”

mentioning

confidence: 99%

Real-Time 2.5-Gb/s Correlated Random Bit Generation Using Synchronized Chaos Induced by a Common Laser With Dispersive Feedback

Wang

Gao

et al. 2020

IEEE J. Quantum Electron.

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We experimentally demonstrate high-speed correlated random bit generation in real time using synchronized chaotic lasers commonly driven by a laser with dispersive feedback. The dispersive feedback from a chirped fiber Bragg grating induces frequency-dependent feedback delay and thus no longer causes time-delay signature, and resultantly ensures the signal randomness and security of chaotic laser. Driven by the time-delay signature-free chaotic signal, the two response lasers are routed into chaotic states and establish a synchronization with correlation beyond 0.97 while they maintain a low correlation level with the drive signal. Through quantizing the synchronized laser chaos with a one-bit differential comparator, real-time 2.5-Gb/s correlated random bits with verified randomness are experimentally obtained with a bit error ratio of 0.07. Combining with a robust sampling method, the BER could be further decreased to 1×10 −4 corresponding to an effective generation rate of 1.7 Gb/s. Bit error analysis indicates that the bit error ratio between the responses is lower than that between the drive and responses over a wide parameter region due to the synchronization superiority of the responses over the drive.

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Experimental Evidence of Time-Delay Concealment in a DFB Laser With Dual-Chaotic Optical Injections

Cited by 18 publications

References 27 publications

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

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

Simultaneous Chaos Time-Delay Signature Cancellation and Bandwidth Enhancement in Cascade-Coupled Semiconductor Ring Lasers

Real-Time 2.5-Gb/s Correlated Random Bit Generation Using Synchronized Chaos Induced by a Common Laser With Dispersive Feedback

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