Wideband chaos synchronization using discrete-mode semiconductor lasers

Wang, Longsheng; Huang, Haoping; Mao, Xiaoxin; Jia, Zhiwei; sun, YueHui; Li, Song-Sui; Wang, Yuncai; Yan, Lianshan; Wang, Anbang

doi:10.1364/ol.487178

Opt. Lett.

2023

DOI: 10.1364/ol.487178

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Wideband chaos synchronization using discrete-mode semiconductor lasers

Longsheng Wang¹,

Haoping Huang²,

Xiaoxin Mao³

et al.

Abstract: Optical chaos communication encounters difficulty in high-speed transmission due to the challenge of realizing wideband chaos synchronization. Here, we experimentally demonstrate a wideband chaos synchronization using discrete-mode semiconductor lasers (DMLs) in a master–slave open-loop configuration. The DML can generate wideband chaos with a 10-dB bandwidth of 30 GHz under simple external mirror feedback. By injecting the wideband chaos into a slave DML, an injection-locking chaos synchronization with synchr… Show more

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2024

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Cited by 2 publications

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Multi-channel broadband optical chaos generation assisted by phase modulation and CFBG feedback

Zhang,

Jiang,

Sun

et al. 2024

Opt. Express

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In this paper, we propose a novel and simple multi-channel broadband optical chaos generation scheme based on phase modulation and chirped fiber Bragg grating (CFBG). Firstly, phase modulation is introduced to generate more new frequency components to broaden the spectrum of the phase chaos. Meanwhile, the accumulated dispersion from CFBG distorts the intensity chaos, converts phase chaos to intensity chaos, and weakens the laser relaxation oscillation. This process would lead to energy redistribution in the power spectrum, effectively increasing the chaotic bandwidth. Then, the wavelength detuning between CFBG and the semiconductor laser is introduced to enhance the chaotic bandwidth further. The experiment results show that the 10 dB bandwidths of the five channels are up to 31.0 GHz, 34.3 GHz, 36.3 GHz, 40 GHz, and 40 GHz, respectively. Note that the maximum bandwidth of the PD in our experiment is limited to 40 GHz. In addition, the multi-channel chaotic signals obtained from the experiment system are used to generate multi-channel physical random numbers. After the post-processing operations, the total rate of five parallel high-speed physical random number generation channels is 4.64 Tbit/s (160 GSa/s × 5bit × 1 channel + 160 GSa/s × 6bit × 4 channels). As far as we know, this is the highest record of using external cavity feedback semiconductor lasers to generate random numbers, which has great potential to meet the security requirements of next-generation Tbit/s optical communication systems.

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Multi-channel broadband optical chaos generation assisted by phase modulation and CFBG feedback

Zhang,

Jiang,

Sun

et al. 2024

Opt. Express

View full text Add to dashboard Cite

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Experimental demonstration on the proactive detection of fiber tapping in optical chaos communication

Wang,

Du,

Mao

et al. 2024

Opt. Lett.

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Optical chaos communication has a physical-layer security advantage but defends passively against a malicious attack. Here, we conduct a proof-of-concept experiment of detecting the attack proactively by observing performance degradation in optical chaos communication tapped with fiber bending. Influences of the curvature radius of the bent fiber on a chaos synchronization coefficient and bit error rate are investigated. Results show that the synchronization coefficient decreases from 0.958 to 0.904 and the bit error rate increases from 1.31 × 10−4 to 1.73 × 10−3 under a curvature radius of 10 mm, revealing the attack. Bending fiber to this extent leads to a power loss of 1.81%, which is difficult to detect by the optical time-domain reflectometer but causes significant interference to chaos communication due to the concurrent change in the light polarization, jointly decreasing the effective optical injection strength for yielding chaos synchronization.

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Wideband chaos synchronization using discrete-mode semiconductor lasers

Cited by 2 publications

References 37 publications

Multi-channel broadband optical chaos generation assisted by phase modulation and CFBG feedback

Multi-channel broadband optical chaos generation assisted by phase modulation and CFBG feedback

Experimental demonstration on the proactive detection of fiber tapping in optical chaos communication

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