Parallel high-speed random bit generation based on wideband chaotic microcomb and wavelet high-pass filtering

We propose and experimentally demonstrate a parallel ultra-fast random bit generation (RBG) scheme based on wideband chaotic microcomb, which utilizes a phase modulation and dispersive component broadening spectrum. The effective bandwidth of each comb tooth is increased by over 10-fold. Wavelet hig...

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Bibliographic Details
Published in:Optics letters 2024-10, Vol.49 (20), p.5981
Main Authors: Li, Anran, Jiang, Ning, Geng, Yong, Qian, Jiahao, Fang, Yingjun, Zhang, Qiang, Zhai, Buqian, Xu, Bo, Qiu, Kun
Format: Article
Language:English
Subjects:
Broadband
Cross correlation
Filtration
Orthogonality
Phase modulation
Probability density functions
Teeth
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Summary:We propose and experimentally demonstrate a parallel ultra-fast random bit generation (RBG) scheme based on wideband chaotic microcomb, which utilizes a phase modulation and dispersive component broadening spectrum. The effective bandwidth of each comb tooth is increased by over 10-fold. Wavelet high-pass filtering (WHPF) is employed to make the probability density functions (PDFs) of the chaotic signal's amplitude unbiased, achieving high symmetry with a skewness coefficient |S| of 0.0026, and the RBG rate of a single channel reaches 200 Gbps. Furthermore, the autocorrelation properties of the random sequences from each comb tooth and the cross-correlation properties between different comb teeth are analyzed, confirming both true randomness and orthogonality. This scheme can simultaneously generate dozens of wideband chaotic combs in the wavelength range of 1500-1600 nm.
ISSN:0146-9592
1539-4794
1539-4794
DOI:10.1364/OL.541407