title: Secure passive optical network based on chaos synchronization.
abstract: A physical-enhanced secure passive optical network (PON) based on chaos synchronization is proposed and numerically demonstrated. In this scheme, the chaotic output of an external-cavity semiconductor laser is used as the transmission carrier in both downstream and upstream directions, the chaos modulation technology is used to encrypt the downstream data, and the multiplexed subcarrier-modulation technology is adopted for the upstream transmission. Simulation results demonstrate that both the downstream data and the upstream data encrypted into the chaotic carriers can be successfully decrypted; moreover, the security of downstream can be enhanced by properly increasing the bit rate, and the upstream security can be maintained at a high level. The proposed PON affords secure all-optical access at the physical layer.
authors.affiliation: Key Laboratory of Optical Fiber Sensing and Communications, Education Ministry of China, University of Electronics Science and Technology of China, Chengdu, Sichuan, China. uestc_nj@uestc.edu.cn
authors.forename: Ning
authors.initials: N
authors.lastname: Jiang
authors.forename: Chongfu
authors.initials: C
authors.lastname: Zhang
authors.forename: Kun
authors.initials: K
authors.lastname: Qiu