Generation of Wideband Chaos With Time-Delay Signature Suppression in Semiconductor Lasers by Asymmetrical Mutual Injection

Wei, Xiaojing; Qiao, Lijun; Wang, Biao; Chai, Mengmeng; Zhang, Mingjiang

doi:10.1109/jlt.2023.3322629

J. Lightwave Technol.

2024

DOI: 10.1109/jlt.2023.3322629

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Generation of Wideband Chaos With Time-Delay Signature Suppression in Semiconductor Lasers by Asymmetrical Mutual Injection

Xiaojing Wei,

Lijun Qiao,

Biao Wang

et al.

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Cited by 2 publications

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Generation of broadband chaotic laser based on a four-segment InP-based monolithically integrated chaotic semiconductor laser

Wang,

Qiao,

Zhang

2024

Opt. Express

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Aiming at the problems of limited bandwidth and obvious time-delay signature (TDS) of monolithically integrated chaotic semiconductor lasers, this paper proposes a four-segment InP-based monolithically integrated chaotic semiconductor laser. The laser structure is composed of a distributed feedback (DFB1) laser region, a semiconductor optical amplifier (SOA) region, a distributed Bragg reflector (DBR) grating region and a distributed feedback (DFB2) laser region. Mutual injection between the two DFB laser regions effectively enhances the bandwidth of power spectrum. The DBR grating region is used to form a complex multi-feedback cavity to suppress the TDS caused by the fixed external cavity structure. The simulation results show that the chaotic signal with the standard bandwidth of 29.2 GHz and the TDS value of 0.094 is generated. The research in this paper can further improve the performance of monolithically integrated chaotic laser, and provide a high-quality chaotic laser source for secure optical communication, chaotic lidar and distributed optical fiber sensing.

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Generation of broadband chaotic laser based on a four-segment InP-based monolithically integrated chaotic semiconductor laser

Wang,

Qiao,

Zhang

2024

Opt. Express

View full text Add to dashboard Cite

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Time-delay signature elimination of chaotic laser via a self-feedback antisymmetric resonator

Zuo,

Shao,

Xie

et al. 2024

Opt. Lett.

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A scheme for generating a chaotic output from a semiconductor laser while eliminating the time-delay signature (TDS) is proposed, leveraging the multi-path feedback provided by a self-feedback antisymmetric coupling fiber ring resonator (SACFRR). A theoretical model is developed to elucidate the feedback perturbation process in the proposed structure. The multi-path feedback can be modeled by incorporating the unit impulse response of the SACFRR into the modified Lang–Kobayashi-based model. We successfully eliminated the TDS using the SACFRR structure in our experimental demonstration. Further investigation into the impact of the coupling coefficient on the TDS revealed that the optimal value is 0.3, which results in the largest mapping area with the TDS below 0.03. The proposed structure is highly effective and simple to implement and integrate. As a result, the chaotic laser generated by this structure can serve as an efficient optical source for encrypted communications, chaotic Lidar, and random bit generation.

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Generation of Wideband Chaos With Time-Delay Signature Suppression in Semiconductor Lasers by Asymmetrical Mutual Injection

Cited by 2 publications

References 37 publications

Generation of broadband chaotic laser based on a four-segment InP-based monolithically integrated chaotic semiconductor laser

Generation of broadband chaotic laser based on a four-segment InP-based monolithically integrated chaotic semiconductor laser

Time-delay signature elimination of chaotic laser via a self-feedback antisymmetric resonator

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