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- Title
Combined Optical Fiber Transmission System Based on QNSC and BER-LM.
- Authors
Yang, Xiaokun; Wang, Xiangqing; Wang, Dongfei; Zhang, Lan; Yang, Zufang; Zhu, Han; Wu, Baohong
- Abstract
A quantum noise stream cipher (QNSC) is a physical layer encryption technology based on quantum noise. Bit error rate loopback measurement (BER-LM) is a method to measure the BER of a loopback channel and extract channel characteristics. Then, channel characteristics can be extracted, and consensus keys can be obtained through negotiation. In previous studies, encryption and key distribution were implemented in independent channels. In this paper, we propose a scheme that combines these two technologies in a single fiber channel to achieve encrypted transmission and key distribution. We verified a 20 Gbps QPSK coherent optical transmission system with a PSK/QNSC scheme. The results show that by reasonably setting the negotiation bit position, the consensus key could be obtained through negotiation, and the requirements of transmission performance could be met. When the negotiation bit position was set to seven, the Q-factor of the system was nine, which met the error-free condition of the 7% forward error correction (FEC) limit.
- Subjects
LIGHT transmission; OPTICAL fibers; FORWARD error correction; QUANTUM noise; OPTICAL communications; STREAM ciphers; QUADRATURE phase shift keying; BIT error rate
- Publication
Photonics, 2023, Vol 10, Issue 2, p154
- ISSN
2304-6732
- Publication type
Article
- DOI
10.3390/photonics10020154