Prof. WenYan Yang Profile

Prof. WenYan Yang

at Chongqing Univ. of Science and Technology

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Proceedings Article | 8 November 2024 Poster + Paper

60 Gbps bidirectional dual-channel chaotic secure communication based on two 1550 nm synchronized response VCSELs

Tianjie Deng, Yingke Xie, Xiaodong Lin, Fei Wang, Xi Tang, Ziye Gao, Haibin Zhong, Wenyan Yang, Tao Deng

Proceedings Volume 13233, 132331A (2024) https://doi.org/10.1117/12.3037492

KEYWORDS: Telecommunications, Vertical cavity surface emitting lasers, Chaos, Polarization

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Based on chaos synchronization between two 1550 nm response vertical-cavity surface-emitting lasers (R-VCSELs), we propose and numerically investigate a bidirectional dual-channel chaotic secure communication system. Under delayed dual-path chaotic signal injections from the injection VCSEL (I-VCSEL) with polarization-preserved optical feedback, a driving VCSEL (D-VCSEL) can generate an optimized chaotic signal, which can drive two R-VCSELs to output polarization-resolved chaotic signals with wide bandwidth about 35 GHz and low TDS below 0.1 in a relatively large parameter range. Moreover, high-quality isochronal chaos synchronization between the corresponding linear polarization components of two R-VCSELs can be achieved. In contrast, the synchronization quality between D-VCSEL and arbitrary one R-VCSEL is inferior. On this basis, through the polarization-division-multiplexing technique in conjunction with the chaos modulation (CM) method, this proposed system can realize security-enhanced bidirectional dual-channel message transmission of 30 Gbps bipolar non-return-to-zero signals over a 140 km fiber link with Q-factors above six. After adopting four-level pulse amplitude modulation, 60 Gbps signals can be successfully transmitted over a 60 km fiber link with Bit-Error-Rates (BERs) below the hard-decision forward error correction (HD-FEC) threshold of 3.8×10^-3.

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