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  • Optica Publishing Group  (17)
  • Zhao, Anke  (17)
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  • Optica Publishing Group  (17)
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  • 1
    Online Resource
    Online Resource
    Chaos synchronization and communication in global semiconductor laser network with coupling time delay signature concealment
    Optica Publishing Group ; 2020
    In:  Applied Optics Vol. 59, No. 22 ( 2020-08-01), p. 6788-
    Details
    In: Applied Optics, Optica Publishing Group, Vol. 59, No. 22 ( 2020-08-01), p. 6788-
    Abstract: Chaos synchronization and pairwise bidirectional communication with coupling time delay signature (CTDS) concealment in a global heterogeneous coupled semiconductor laser (SL) network are achieved by introducing identical chaotic injections from an external SL with self-feedback. The properties of chaos synchronization and CTDSs in four indicative cases are comparatively discussed. Moreover, the influences of key parameters on the quality of chaos synchronization and the CTDS characteristics are thoroughly investigated. On the basis of the chaos synchronization, the chaotic communication performance is further analyzed. The numerical results demonstrate that with the joint contributions of heterogeneous couplings and external identical chaotic injections, isochronous chaos synchronization can be achieved between two arbitrary SLs, and simultaneously the CTDSs are suppressed to a distinguishable level close to zero, over a wide parameter range. Besides, bidirectional transmission with a bit rate beyond 6 Gbit/s can be achieved between the synchronized SLs. Comparing with the conventional two-user communication system, the proposed SL network with CTDS concealment supports flexible network-type message exchanges between pairwise SLs.
    Type of Medium: Online Resource
    ISSN: 1559-128X , 2155-3165
    URL: Article
    DOI: 10.1364/AO.400262
    Language: English
    Publisher: Optica Publishing Group
    Publication Date: 2020
    detail.hit.zdb_id: 207387-0
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  • 2
    Online Resource
    Online Resource
    Generation of broadband chaos with perfect time delay signature suppression by using self-phase-modulated feedback and a microsphere resonator
    Optica Publishing Group ; 2018
    In:  Optics Letters Vol. 43, No. 21 ( 2018-11-01), p. 5359-
    Details
    In: Optics Letters, Optica Publishing Group, Vol. 43, No. 21 ( 2018-11-01), p. 5359-
    Type of Medium: Online Resource
    ISSN: 0146-9592 , 1539-4794
    URL: Article
    DOI: 10.1364/OL.43.005359
    Language: English
    Publisher: Optica Publishing Group
    Publication Date: 2018
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  • 3
    Online Resource
    Online Resource
    Secure key distribution based on hybrid chaos synchronization between semiconductor lasers subject to dual injections
    Optica Publishing Group ; 2022
    In:  Optics Express Vol. 30, No. 18 ( 2022-08-29), p. 32366-
    Details
    In: Optics Express, Optica Publishing Group, Vol. 30, No. 18 ( 2022-08-29), p. 32366-
    Abstract: We propose and numerically demonstrate a novel secure key distribution (SKD) scheme by using dynamically synchronized semiconductor lasers (SLs) subject to common dual injections from two mutually coupled SLs. The performance of hybrid chaos synchronization, complexity of chaotic signals, chaos-based key distribution, and the privacy of SKD scheme are systematically discussed. It is shown that high-quality hybrid chaos synchronization of zero lag and lead lag can be both achieved between two local lasers under different injection delay conditions, whereas low cross correlations are observed among the driving lasers and the local lasers. By randomly perturbing the injection delays with four independent random sequences, the outputs of local SLs can be dynamically synchronized. Extracting the outputs in the synchronization time slots of zero lag and lead lag, synchronous entropy sources are obtained and used to generate keys with high consistency at local ends of Alice and Bob, which are robust to the parameter mismatches of local lasers to some extent. Moreover, large BER is calculated in two types of typical illegal attacks, which demonstrates the security of the proposed scheme. This work proposed a high-level secure key distribution solution to one-time pad communication.
    Type of Medium: Online Resource
    ISSN: 1094-4087
    URL: Article
    DOI: 10.1364/OE.461957
    Language: English
    Publisher: Optica Publishing Group
    Publication Date: 2022
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  • 4
    Online Resource
    Online Resource
    Generation and synchronization of wideband chaos in semiconductor lasers subject to constant-amplitude self-phase-modulated optical injection
    Optica Publishing Group ; 2020
    In:  Optics Express Vol. 28, No. 9 ( 2020-04-27), p. 13292-
    Details
    In: Optics Express, Optica Publishing Group, Vol. 28, No. 9 ( 2020-04-27), p. 13292-
    Abstract: We propose a novel wideband chaos generation scheme by using an external-cavity semiconductor laser (ECSL) subject to optical-electronic hybrid feedback. In this scheme, the output of ECSL is photo-detected and used to modulate the output of a continuous wave laser by an electro-optical phase modulator, the constant-amplitude self-phase-modulated light is then injected back into the ECSL. The experimental results indicate that, compared with the chaos generation with conventional optical feedback (COF), significant bandwidth enhancement is achieved in the proposed scheme. The effective bandwidth of generated chaos is increased from a few GHz to over 20 GHz, and moreover, the spectrum flatness and the complexity of generated chaos are also considerably improved. Furthermore, we propose a wideband chaos synchronization system based on the proposed chaos generation scheme. It is experimentally demonstrated that high-quality synchronization between two wideband chaos signals with an effective bandwidth greater than 20 GHz is achieved. This work simultaneously achieves the generation and the synchronization of wideband chaos, which shows valuable potential in chaos-based secure communication, such as enhancing the transmission capacity and improving the security.
    Type of Medium: Online Resource
    ISSN: 1094-4087
    URL: Article
    DOI: 10.1364/OE.393276
    Language: English
    Publisher: Optica Publishing Group
    Publication Date: 2020
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  • 5
    Online Resource
    Online Resource
    Chaos synchronization and communication in closed-loop semiconductor lasers subject to common chaotic phase-modulated feedback
    Optica Publishing Group ; 2018
    In:  Optics Express Vol. 26, No. 25 ( 2018-12-10), p. 32404-
    Details
    In: Optics Express, Optica Publishing Group, Vol. 26, No. 25 ( 2018-12-10), p. 32404-
    Type of Medium: Online Resource
    ISSN: 1094-4087
    URL: Article
    DOI: 10.1364/OE.26.032404
    Language: English
    Publisher: Optica Publishing Group
    Publication Date: 2018
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  • 6
    Online Resource
    Online Resource
    Generation of synchronized wideband complex signals and its application in secure optical communication
    Optica Publishing Group ; 2020
    In:  Optics Express Vol. 28, No. 16 ( 2020-08-03), p. 23363-
    Details
    In: Optics Express, Optica Publishing Group, Vol. 28, No. 16 ( 2020-08-03), p. 23363-
    Abstract: We propose and demonstrate a novel secure optical communication scheme, in which the message signal is encrypted and decrypted by two synchronized wideband complex signals. In our scheme, the wideband complex signals are generated by two private chaotic driving signals which are obtained from two local conventional external-cavity semiconductor lasers (ECSLs) subject to a common injection. Both the experimental and simulation results show that, the effective bandwidths of the chaotic driving signals are significantly improved and the time-delay signatures are completely suppressed, in virtue of the spectral broadening effect of chaotic phase-modulation and the phase-to-intensity conversion effect of dispersive components. Furthermore, the generated wideband complex signals are used as the optical carriers for achieving secure transmission. The message signal with a bit rate up to 10 Gb/s can be well hidden into the carrier, and cannot be recognized by the eavesdropper. The high-quality synchronization ensures that the message signal can be correctly recovered at the receiver.
    Type of Medium: Online Resource
    ISSN: 1094-4087
    URL: Article
    DOI: 10.1364/OE.398119
    Language: English
    Publisher: Optica Publishing Group
    Publication Date: 2020
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  • 7
    Online Resource
    Online Resource
    Adaptive time-delayed photonic reservoir computing based on Kalman-filter training
    Optica Publishing Group ; 2022
    In:  Optics Express Vol. 30, No. 8 ( 2022-04-11), p. 13647-
    Details
    In: Optics Express, Optica Publishing Group, Vol. 30, No. 8 ( 2022-04-11), p. 13647-
    Abstract: We propose an adaptive time-delayed photonic reservoir computing (RC) structure by utilizing the Kalman filter (KF) algorithm as training approach. Two benchmark tasks, namely the Santa Fe time-series prediction and the nonlinear channel equalization, are adopted to evaluate the performance of the proposed RC structure. The simulation results indicate that with the contribution of adaptive KF training, the prediction and equalization performance for the benchmark tasks can be significantly enhanced, with respect to the conventional RC using a training approach based on the least-squares (LS). Moreover, by introducing a complex mask derived from a bandwidth and complexity enhanced chaotic signal into the proposed RC, the performance of prediction and equalization can be further improved. In addition, it is demonstrated that the proposed RC system can provide a better equalization performance for the parameter-variant wireless channel equalization task, compared with the conventional RC based on LS training. The work presents a potential way to realize adaptive photonic computing.
    Type of Medium: Online Resource
    ISSN: 1094-4087
    URL: Article
    DOI: 10.1364/OE.454852
    Language: English
    Publisher: Optica Publishing Group
    Publication Date: 2022
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  • 8
    Online Resource
    Online Resource
    Photonic decision-making for arbitrary-number-armed bandit problem utilizing parallel chaos generation
    Optica Publishing Group ; 2021
    In:  Optics Express Vol. 29, No. 16 ( 2021-08-02), p. 25290-
    Details
    In: Optics Express, Optica Publishing Group, Vol. 29, No. 16 ( 2021-08-02), p. 25290-
    Abstract: In this paper, we propose and experimentally demonstrate a novel scheme that helps to solve an any-number-armed bandit problem by utilizing two parallel simultaneously-generated chaotic signals and the epsilon ( ɛ )-greedy strategy. In the proposed scheme, two chaotic signals are experimentally generated, and then processed by an 8-bit analog-to-digital conversion (ADC) with 4 least significant bits (LSBs), to generate two amplitude-distribution-uniform sequences for decision-making. The correspondence between these two random sequences and different arms is established by a mapping rule designed in virtue of the ɛ-greedy-strategy. Based on this, decision-making for an exemplary 5-armed bandit problem is successfully performed, and moreover, the influences of the mapping rule and unknown reward probabilities on the correction decision rate (CDR) performance for the 4-armed to 7-armed bandit problems are investigated. This work provides a novel way for solving the arbitrary-number-armed bandit problem.
    Type of Medium: Online Resource
    ISSN: 1094-4087
    URL: Article
    DOI: 10.1364/OE.432956
    Language: English
    Publisher: Optica Publishing Group
    Publication Date: 2021
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  • 9
    Online Resource
    Online Resource
    Pulsed-chaos MIMO radar based on a single flat-spectrum and Delta-like autocorrelation optical chaos source
    Optica Publishing Group ; 2022
    In:  Optics Express Vol. 30, No. 4 ( 2022-02-14), p. 4782-
    Details
    In: Optics Express, Optica Publishing Group, Vol. 30, No. 4 ( 2022-02-14), p. 4782-
    Abstract: We propose and demonstrate a pulsed-chaos multiple-input-multiple-output (MIMO) radar system in this paper. In the proposed MIMO radar system, multi-channel pulsed chaotic signals are extracted from an optical seed chaos source with Delta-like autocorrelation and flat spectrum. The seed chaos source is generated by passing the chaotic output of an external-cavity semiconductor laser through a dispersive self-feedback phase-modulation loop and used for MIMO radar signal generation. The cross-correlation characteristics of MIMO radar signals, the maximum channel number of separable mixed echoes, as well as the performances of multi-target ranging and anti-interference in the proposed pulsed-chaos MIMO radar system are systematically investigated. The results indicate that multi-channel pulsed-chaos signals with Delta-like autocorrelation can be simultaneously generated from the seed chaos source, and excellent quasi-orthogonality of transmission radar signals can be guaranteed. Moreover, it is demonstrated that the proposed pulsed-chaos MIMO radar supports multi-target ranging with a centimeter-level resolution and can maintain satisfactory performance under low SNR scenarios with various interferences.
    Type of Medium: Online Resource
    ISSN: 1094-4087
    URL: Article
    DOI: 10.1364/OE.450949
    Language: English
    Publisher: Optica Publishing Group
    Publication Date: 2022
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  • 10
    Online Resource
    Online Resource
    Physical secure optical communication based on private chaotic spectral phase encryption/decryption
    Optica Publishing Group ; 2019
    In:  Optics Letters Vol. 44, No. 7 ( 2019-04-01), p. 1536-
    Details
    In: Optics Letters, Optica Publishing Group, Vol. 44, No. 7 ( 2019-04-01), p. 1536-
    Type of Medium: Online Resource
    ISSN: 0146-9592 , 1539-4794
    URL: Article
    DOI: 10.1364/OL.44.001536
    Language: English
    Publisher: Optica Publishing Group
    Publication Date: 2019
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