Abstract
We propose a secure key distribution (SKD) based on local polarization modulation driven by optical chaos in a reciprocal fiber link. A robust error-free SKD with a key generation rate of 4.3 Gbit/s over transmission of 10-km standard single-mode fiber is experimentally demonstrated. A chaotic laser system shared by legitimate users serves as an external wideband entropy source. The polarization reciprocity of the fiber channel provides fundamental safety against eavesdropping. The robustness of SKD resulted from local chaotic polarization modulation is also theoretically analyzed and then verified by practical performance. The proposed scheme is an alternative SKD strategy with high speed and strong security.
© 2021 Optica Publishing Group
Full Article | PDF ArticleMore Like This
Taihan Qiu, Weidong Shao, Lei Deng, Qi Yang, Deming Liu, Yongqin Yu, Xiaojing Gao, and Mengfan Cheng
Opt. Lett. 48(13) 3547-3550 (2023)
Weidong Shao, Taihang Qiu, Lei Deng, Qi Yang, Xiaoxiao Dai, Deming Liu, and Mengfan Cheng
Opt. Lett. 47(23) 6125-6128 (2022)
Zexi Zhao, Mengfan Cheng, Chenkun Luo, Lei Deng, Minming Zhang, Songnian Fu, Ming Tang, Ping Shum, and Deming Liu
Opt. Lett. 44(10) 2605-2608 (2019)