Abstract

Providing physical layer security at the lowest network layer in fiber-optic communication systems is a technical challenge worldwide. Here, we propose and experimentally demonstrate a pure hardware optical encryption scheme based on temporal spreading and self-feedback phase encryption for high-speed and long-distance physical-layer secure optical communication. A record high bit-rate–distance product of 6400 Gb/s km is successfully achieved by the secure transmission of a 32 Gb/s on-off-keying modulated confidential signal over a 200 km optical fiber link. The demonstrated scheme is fully compatible with conventional optical transmission systems and can be operated in a pluggable manner, which may pave a new path to ultra-high-speed physical-layer secure optical communication in the future.

© 2022 Optica Publishing Group

Photonic-layer secure 56 Gb/s PAM4 optical communication based on common noise driven synchronous private temporal phase en/decryption

Zhensen Gao, Lei Liao, Biao Su, Qiongqiong Wu, Xulin Gao, Songnian Fu, Zhaohui Li, Yuncai Wang, and Yuwen Qin
Opt. Lett. 47(19) 5232-5235 (2022)

56 Gb/s PAM4 physical secure communication based on electro-optic self-feedback hardware temporal phase encryption and decryption

Zhensen Gao, Ying Luo, Lihong Zhang, Bin Tang, Xulin Gao, Wenfu Gu, Yuehui Sun, Zhaohui Li, Yuwen Qin, and Yuncai Wang
Opt. Express 31(2) 1666-1676 (2023)

60 Gb/s coherent optical secure communication over 100 km with hybrid chaotic encryption using one dual-polarization IQ modulator

Yuqing Wu, Hanwen Luo, Lei Deng, Qi Yang, Xiaoxiao Dai, Deming liu, and Mengfan Cheng
Opt. Lett. 47(20) 5285-5288 (2022)

Experimental demonstration of synchronous privacy enhanced chaotic temporal phase en/decryption for high speed secure optical communication

Zhensen Gao, Qiongqiong Wu, Lei Liao, Biao Su, Xulin Gao, Songnian Fu, Zhaohui Li, Yuncai Wang, and Yuwen Qin
Opt. Express 30(17) 31209-31219 (2022)

Coherent chaotic optical communication of 30 Gb/s over 340-km fiber transmission via deep learning

Zhao Yang, Junxiang Ke, Qunbi Zhuge, Weisheng Hu, and Lilin Yi
Opt. Lett. 47(11) 2650-2653 (2022)