Photonic layer security in fiber-optic networks and optical OFDM transmission

Alireza BaghaeiPouri, Mohammad Ali Torabi

Dimitris Syvridis, Evangelos Pikasis, Charidimos Chaintoutis

Zhi Chai, Liuming Zhang, Xinran Huang +2 more

A secure OFDM data communication scheme is proposed for wireless or optical networks, where a 200Kbps data transmission integrated with 50Kbps physical-layer key distribution is demonstrated using non-orthogonal multiple access (NOMA).

Jiajia Shen, Suiyao Zhu, Xubiao Zhang +3 more

In this study, we address the challenges of performance and security in passive optical networks (PON) by proposing and experimentally validating a quantum-enhanced affine frequency division multiplexing (AFDM) PON system. Through comparative experimental analysis of chromatic dispersion tolerance characteristics, we demonstrate that AFDM signals achieve receiver sensitivity gains of 0.5 dB, 1 dB, and 3 dB over conventional orthogonal frequency division multiplexing (OFDM) systems in 30-km, 50-km, and 80-km standard single-mode fiber (SSMF) transmissions, respectively. For secure PON transmission, we introduce a six-dimensional (6-D) signal encryption scheme, where the generated random sequence with true randomness masks AFDM signals across multiple physical dimensions to resist brute-force attacks. Experimental validation in a 10-km 7-core fiber system verifies the synergistic integration of multi-core signal distribution and key management, with AFDM exhibiting a 1-dB performance advantage in crosstalk-dominated environments. Notably, the proposed framework demonstrates exceptional inter-core interference suppression while maintaining complete physical layer security, establishing a technological foundation for high-capacity secure optical access networks.

Ben Wu, Bhavin J. Shastri, Paul R. Prucnal

Yonghao Li, Yifeng Wang

At present, the optical fiber transmission technology is developing more and more rapidly. In the meantime, the discussion on the security issues triggered by it has become more and more intense. Based on this, this article summarizes the mainstream methods for improving the security of optical fiber transmission technology at the present stage. This can provide the certain reference direction for future research and exploration. Currently certain accomplishments have been attained in the physical layer, management layer, the network layer, the encryption technology, and the access control. But at the same time, there are also some disadvantages in certain aspects. For example, the complexity of the encryption technology is too high, the cost of the management layer is too excessive, and the difficulty of constructing the network layer is too great. In the future, more in-depth research can be conducted in material improvement, intelligent management, optimization of encryption technology, construction of secure networks, and detection of intrusion signals. This will further enhance the security of optical fiber transmission technology.